CBM Calculator

Every international shipment starts with the same question: how much space will this cargo actually take up, and what will it cost to move? This CBM calculator answers both questions directly: enter your shipment’s dimensions and quantity, and get total cubic meters, volumetric weight, chargeable weight, container utilization, and an educational freight cost estimate in one place. Whether you’re a freight forwarder quoting a new client, an importer consolidating cargo into a shared container, or an e-commerce seller shipping cartons internationally for the first time, this cubic meter calculator turns freight volume calculation from a manual, error-prone process into an instant, reliable answer.

Six dedicated modes cover the different ways CBM calculation actually gets used in freight forwarding and logistics. The CBM Calculator is the default: full dimension-and-quantity-based volume calculation supporting box, pallet, crate, cylinder, roll, and custom package shapes. The Volumetric Weight Calculator compares volumetric and actual weight to determine chargeable weight for air freight. The Container Loading Calculator checks shipment volume against standard container capacities. The Pallet CBM Calculator uses standard pallet footprint presets for quick palletized cargo estimates. The Multi-Package Calculator aggregates up to 100 different package types into a combined shipment total. The Shipping Cost Calculator estimates freight cost from CBM and a freight rate.

This tool serves the full range of people who move cargo internationally: freight forwarders and freight brokers quoting shipments across ocean, air, road, and rail modes, importers and exporters planning container loads, warehouse managers and supply chain professionals estimating storage and handling capacity, and manufacturers and e-commerce sellers shipping palletized cargo, cartons, crates, and irregular freight. The underlying volume-based calculation logic stays identical across every one of these contexts, what changes is which package shape, container type, transport mode, and currency apply to a specific shipment.

This calculator supports every common cargo type and package shape freight forwarders and shippers actually encounter, including palletized cargo, cartons, crates, cylindrical drums and rolls, and fully custom irregular shapes, all fitting within the same underlying volume calculation framework, whether the cargo is ocean freight (FCL or LCL), air freight, road freight, rail freight, or courier shipments. Seven major world currencies are supported for shipping cost estimation, letting freight forwarders and shippers quote in whichever currency is most relevant for a specific client, trade lane, or internal reporting requirement.

How the CBM Calculator Formula Works

This calculator measures how much physical space a shipment occupies by converting its dimensions to meters and multiplying them together, then scaling that figure by quantity for a total shipment volume. The formula itself is simple geometry, length times width times height, but its practical value comes from consistently applying it the same way across every shipment, package shape, and unit system a freight operation encounters.

Step-by-step calculation walkthrough

Step 1: Identify the inputs. A wooden crate measuring 200 × 100 × 150 cm, with a quantity of 3 crates.

Step 2: Apply the formula. Convert each dimension from centimeters to meters. Single CBM = Length (m) × Width (m) × Height (m). Total CBM = Single CBM × Quantity.

Step 3: Perform the calculation. 200 cm = 2.00 m, 100 cm = 1.00 m, 150 cm = 1.50 m. Single crate CBM = 2.00 × 1.00 × 1.50 = 3.000 m³. Total CBM = 3.000 × 3 = 9.00 m³.

Step 4: Interpret the result. This shipment of 3 crates occupies 9.00 m³ of space, roughly 27% of a 20′ Standard container’s 33.2 m³ capacity. That figure feeds directly into container selection, LCL freight quoting, and customs documentation, all of which reference total CBM rather than individual crate dimensions.

Assumptions and limitations: the arithmetic is exact given accurate dimensions and quantity, but the result only reflects the space a shipment’s outer footprint occupies, not how efficiently that footprint actually packs into a real container alongside other cargo, irregular stacking, bracing, and dunnage all reduce usable container space below its theoretical CBM capacity. For cylindrical cargo, the calculator uses the exact πr²h formula rather than a rectangular approximation, giving a more accurate figure than bounding-box measurement for genuinely round items.

What Is CBM?

CBM stands for cubic meter, the standard unit of volume measurement used throughout international freight forwarding, ocean shipping, and air cargo to quantify how much physical space a shipment occupies. Working through the worked example from the step-by-step solution above: a package measuring 120 × 80 × 60 cm converts to 1.20 × 0.80 × 0.60 meters, giving a single-package CBM of 0.576 m³; multiplied by a quantity of 5, this produces a total shipment CBM of 2.88 m³. This single figure, CBM, becomes the foundation for container loading decisions, freight cost calculations, and shipping documentation across virtually every international shipping transaction.

CBM serves as a universal, standardized unit specifically because it allows carriers, freight forwarders, and shippers to communicate and price shipment volume consistently regardless of the specific commodity, packaging type, or country of origin involved. A furniture manufacturer in one country and an electronics distributor in another can both express their shipment’s space requirements in the same CBM terms, allowing consistent container planning, freight quoting, and documentation across an enormously diverse range of cargo types moving through the same global shipping infrastructure.

Why CBM Matters in Shipping

CBM matters because it directly determines how much of a scarce, priced resource (container space, aircraft cargo hold capacity, truck bed volume) a specific shipment consumes, which in turn drives a substantial portion of what that shipment actually costs to move. Two shipments of identical weight can cost dramatically different amounts to ship if their CBM differs significantly, since the bulkier shipment consumes more of the carrier’s finite space regardless of how light it is. This is exactly why accurate CBM calculation isn’t merely a bureaucratic formality: it’s a genuinely consequential input into freight cost, one that shippers who understand and actively manage (through packaging optimization, consolidation, and mode selection) can meaningfully influence, while shippers who ignore it risk consistently overpaying relative to what accurate volume-based planning would achieve.

Beyond cost, accurate CBM calculation also directly affects operational planning throughout the shipping process: from initial container or vehicle selection, through customs documentation (which frequently requires declared CBM figures), to final delivery logistics at the destination. Getting CBM wrong doesn’t just risk a pricing surprise; it can also result in a shipment that doesn’t actually fit in the container or vehicle initially booked, requiring last-minute rebooking, delays, and additional costs considerably beyond the original volume miscalculation itself.

How to Calculate CBM

Calculating CBM follows a straightforward two-step process: first, convert length, width, and height to meters (regardless of what unit they were originally measured in) and multiply them together to get the volume of a single unit; second, multiply that single-unit CBM by the total quantity of identical units to get total shipment CBM. This calculator’s CBM Calculator mode above automates both steps directly, supporting millimeters, centimeters, meters, inches, and feet as input units and converting automatically. This removes the manual unit conversion errors that commonly creep into hand-calculated freight volume figures.

For non-rectangular cargo, the calculation adapts to the specific shape involved. Cylindrical cargo (drums, rolls, pipes) uses the formula CBM = π × r² × h, where r is the radius (half the diameter) and h is the height or length of the cylinder. This calculator’s Cylinder and Roll shape options in the CBM Calculator mode handle this calculation automatically from an entered diameter and height. Irregularly shaped cargo that doesn’t fit a simple rectangular or cylindrical model typically requires either breaking the item down into simpler component shapes calculated separately and summed, or measuring the maximum bounding rectangular dimensions (the smallest rectangular box the item would fit inside) as a conservative volume estimate, since carriers generally charge based on the space an item occupies rather than its precise geometric volume.

Multi-Package and Consolidated Shipment Calculations

Real-world shipments frequently involve multiple different item types rather than a single uniform package repeated identically, a furniture shipment might include several distinct product lines, each with its own dimensions and quantity, all consolidating into a single container or booking. The Multi-Package Calculator mode above is purpose-built for exactly this scenario, supporting up to 100 different item entries, each with independent dimensions and quantity, automatically aggregating into a combined total CBM alongside a detailed breakdown table showing each item’s individual contribution to that total.

This multi-package aggregation capability serves several practical purposes beyond simply arriving at a combined total. It supports accurate customs documentation, which typically requires itemized shipment manifests rather than a single blended volume figure. It enables informed decisions about whether to split a large, diverse shipment across multiple containers or consolidate everything into one, based on seeing exactly how much volume each item category actually contributes. And it supports cost allocation across different product lines or customers sharing a single consolidated shipment, letting each item’s proportional share of total freight cost be calculated based on its individual CBM contribution to the overall total.

Air Freight vs Sea Freight

Air freight and sea (ocean) freight price cargo using meaningfully different logic, and understanding this distinction is essential for choosing the right transport mode and estimating costs accurately. Air freight typically bills based on chargeable weight (the greater of actual weight or volumetric weight, calculated using the Volumetric Weight Calculator mode above), since air cargo space is scarce and airlines need to account for both weight and space constraints simultaneously. Ocean freight, particularly for less-than-container-load (LCL) shipments, typically bills based on CBM directly (or occasionally weight, whichever generates more revenue for the carrier), reflecting sea freight’s greater sensitivity to volume than to weight for most general cargo. This fundamental pricing difference is exactly why the same shipment can be dramatically cheaper via one mode versus the other depending on its specific weight-to-volume ratio.

Beyond pricing structure, air and sea freight differ substantially in transit time and cost scale, factors that often matter as much as the per-unit shipping rate itself. Air freight typically moves cargo in days rather than the weeks ocean freight requires, making it the natural choice for time-sensitive, high-value, or perishable cargo despite its considerably higher per-kilogram or per-CBM cost. Ocean freight’s dramatically lower cost per unit volume makes it the default choice for bulky, lower-value cargo where transit time is less critical: the classic tradeoff between speed and cost that shapes most international shipping mode decisions. Road and rail freight, while not carrying the same international scope as air and ocean, apply similar volume-and-weight-based pricing logic for domestic and regional cargo movement, making the same CBM and chargeable weight calculations broadly relevant across virtually every transport mode this calculator supports.

Volumetric Weight Explained

Volumetric weight (also called dimensional weight) exists specifically to address a pricing problem carriers face with bulky, lightweight cargo: without a volumetric weight rule, a large but very light shipment would be underpriced relative to the trailer, aircraft, or container space it actually occupies. The volumetric weight formula, Length × Width × Height (cm) ÷ divisor, converts a shipment’s physical dimensions into an equivalent “weight” figure that reflects its space consumption. The International Air Transport Association (IATA) sets the general rule of dividing shipment volume in cubic centimeters by 6,000 for standard air cargo, though couriers and some carriers use 5,000, and 7,000 also appears on certain trade lanes. Whichever is greater, this calculated volumetric weight or the shipment’s actual physical weight, becomes the chargeable weight carriers actually bill against.

The specific divisor a carrier uses meaningfully affects the resulting volumetric weight and therefore the shipping cost. A lower divisor (like 5000) produces a higher volumetric weight for the same dimensions than a higher divisor (like 7000), making 5000-divisor pricing generally less favorable for bulky, low-density cargo. Different carriers, trade lanes, and even different service levels from the same carrier sometimes use different standard divisors, which is exactly why this calculator’s Volumetric Weight Calculator mode above lets you select between the three most commonly referenced divisors (5000, 6000, and 7000) to match your specific carrier’s published policy, rather than assuming a single universal figure applies across all air freight shipments.

Common Logistics Terms

Freight forwarding and international shipping carry their own specialized vocabulary worth understanding for anyone regularly working with CBM calculations and shipping documentation. FCL (full container load) and LCL (less-than-container-load) describe whether a shipment occupies an entire dedicated container or shares container space with other shippers’ cargo. Chargeable weight refers to the greater of actual and volumetric weight: the figure carriers actually bill against. Freight forwarder describes a company that arranges shipping on behalf of importers and exporters, coordinating between shippers, carriers, and customs authorities. Incoterms (international commercial terms) define which party bears responsibility and cost for different stages of a shipment’s journey, a related but distinct concept from the pure volume and weight calculations this calculator focuses on.

TEU (twenty-foot equivalent unit) is a standardized measure of container-carrying capacity based on the 20′ Standard container, used to describe port and vessel capacity in aggregate terms. Consolidation refers to combining multiple smaller shipments into a single larger shipment or container to improve cost efficiency, directly related to the cargo consolidation concept discussed in the Logistics Insights section above. Demurrage and detention describe charges incurred when a container isn’t returned or unloaded within an agreed timeframe. These costs are entirely separate from the CBM-based freight charges this calculator estimates, but worth being aware of as part of the broader total cost of an international shipment.

Container Sizes and Capacities

Standard shipping containers come in a small number of internationally standardized sizes, each with a specific usable cubic meter capacity: the 20′ Standard container holds approximately 33.2 CBM, the 40′ Standard holds approximately 67.7 CBM, the 40′ High Cube (with additional height) holds approximately 76.3 CBM, and the 45′ High Cube holds approximately 86.0 CBM. The Container Loading Calculator mode above checks your total shipment CBM against any of these standard capacities directly, showing container fill percentage and remaining available space, essential information for deciding whether a shipment needs a full container (FCL), can share space with other cargo (LCL), or requires splitting across multiple containers.

Choosing the right container size involves balancing several considerations beyond simply finding the smallest container that fits a given CBM total. A shipment that just barely exceeds a 40′ Standard container’s capacity might be better served by upgrading to a 40′ High Cube (with its additional height) rather than booking two separate 20′ Standard containers, depending on relative pricing for the specific trade lane. Weight distribution and container weight limits matter alongside pure volume, a container can reach its practical weight limit well before filling its available cubic capacity, particularly for dense cargo like machinery or metal goods, meaning container selection sometimes needs to account for weight constraints as much as volume constraints.

Package Shapes and Irregular Cargo

Not all cargo fits neatly into a rectangular box, and this calculator’s support for multiple package shapes, box, pallet, crate, cylinder, roll, and custom, reflects the genuine variety of cargo forms encountered in real freight forwarding. Boxes, pallets, and crates share the same rectangular volume formula, differing mainly in typical size and handling characteristics rather than the underlying math. Cylindrical cargo (drums, rolls of material, pipes, and similar cylindrical items) uses the distinct πr²h formula, since applying a rectangular bounding-box calculation to genuinely cylindrical cargo would meaningfully overstate its actual volume (a cylinder occupies roughly 78.5% of its bounding rectangular box’s volume).

Truly irregular cargo (items that don’t cleanly fit either a rectangular or cylindrical model) presents the greatest measurement challenge, and this calculator’s Custom shape option supports entering the maximum bounding rectangular dimensions as a practical, conservative approach. While this bounding-box approach doesn’t capture an irregular item’s precise geometric volume, it reflects the reality that carriers generally allocate and charge for the rectangular space an item occupies during transport and storage, regardless of the item’s actual internal shape, making bounding-box measurement the practically relevant figure for most freight forwarding purposes, even when it doesn’t perfectly match an item’s true geometric volume.

Warehouse Applications

CBM calculation extends well beyond active shipping into warehouse storage planning, where accurately estimating the cubic volume of inventory directly affects storage space allocation, racking system design, and overall warehouse capacity utilization. Warehouse managers use the same underlying CBM math this calculator performs to estimate how much storage space incoming inventory will require, plan efficient rack and floor layouts, and forecast when additional storage capacity will be needed as inventory volume grows. The Multi-Package Calculator mode above, supporting up to 100 different item types in a single calculation, is particularly useful for this broader warehouse planning use case, where a single shipment or storage planning exercise often involves many different product types simultaneously.

Beyond static storage capacity planning, CBM calculation supports ongoing warehouse operational decisions: forecasting incoming shipment volume ahead of arrival to plan receiving dock and staging area allocation, calculating outbound shipment volume to determine appropriate vehicle or container sizing for each dispatch, and tracking overall warehouse utilization trends over time to identify when expansion or a second facility becomes necessary. E-commerce fulfillment operations in particular benefit from accurate, fast CBM calculation given the sheer diversity and volume of individual SKUs typically moving through a fulfillment warehouse, the Multi-Package Calculator mode’s 100-item capacity directly supports this kind of high-SKU-count operational planning.

Shipping Cost Optimization

Since CBM (or volumetric weight, depending on transport mode) directly drives freight pricing, optimizing shipment density and packaging is one of the most direct levers shippers have for controlling freight costs. Reducing packaging bulk, using appropriately sized boxes or crates rather than oversized generic packaging, and consolidating multiple smaller shipments into fewer, better-utilized containers all reduce the CBM or volumetric weight a carrier actually bills against. The Shipping Cost Calculator mode above lets you model how a specific freight rate translates a given CBM figure into an actual estimated cost, making the direct financial impact of packaging and consolidation decisions concrete rather than abstract.

Beyond packaging optimization itself, several complementary strategies help control overall freight spend across a shipping operation. Negotiating freight rates directly with carriers or through a freight forwarder for businesses with consistent, recurring shipping volume typically secures meaningfully better per-CBM or per-kilogram pricing than ad-hoc spot-market rates. Choosing the right transport mode for each shipment’s specific weight-to-volume ratio and time sensitivity, rather than defaulting to a single habitual mode regardless of shipment characteristics, ensures each shipment moves via its most cost-effective option. Consolidating multiple smaller shipments bound for the same destination into fewer, larger, better-utilized shipments reduces the fixed-cost component embedded in every individual freight booking, a strategy the Multi-Package Calculator mode above directly supports by modeling combined shipment volume before finalizing how many separate bookings a given order actually requires.

Common CBM Calculation Mistakes

The most common mistake is incorrect unit conversion: forgetting to convert centimeters to meters (or inches to meters) before calculating CBM, producing a result that’s off by orders of magnitude. Ignoring quantity (calculating single-unit CBM but forgetting to multiply by total pieces) similarly produces a dramatically understated total shipment volume. Wrong measurements and mixing inches and centimeters within the same calculation both introduce errors that can be difficult to spot without careful review. Using internal instead of external dimensions understates true shippable volume, since carriers bill based on the full external footprint including packaging. Ignoring pallet size (measuring only goods without the pallet’s own footprint and height), incorrect volumetric divisor selection (using the wrong divisor for a specific carrier or trade lane), not considering packaging bulk, overfilling containers beyond stated capacity, and ignoring weight limits (a container can be volume-full well before reaching its weight limit, or vice versa) round out the most common, most costly CBM calculation mistakes.

The unit-conversion mistake deserves particular emphasis since it’s both extremely common and can produce a dramatically wrong CBM figure if overlooked, a shipment dimensioned in centimeters but mistakenly treated as meters would calculate to a CBM figure one million times too large, while the reverse error understates volume by the same enormous factor. This is precisely why this calculator handles unit conversion automatically across every mode, converting whatever units you select into a consistent internal system before calculating, removing this specific high-impact error source entirely as long as the correct unit is selected for each dimension input.

Logistics Insights

FCL vs LCL represents one of the most consequential decisions in ocean freight planning: full container load (FCL) dedicates an entire container to a single shipper’s cargo, while less-than-container-load (LCL) shares container space among multiple shippers’ cargo, typically priced by CBM. FCL generally makes economic sense once a shipment approaches roughly 15 CBM or more (though this threshold varies by trade lane and specific rates), below which LCL often proves more cost-effective despite its per-CBM rate typically running higher than the equivalent FCL cost-per-CBM, since LCL avoids paying for substantial unused container capacity. Air freight pricing and ocean freight pricing operate under fundamentally different economic logic: air cargo space is scarce and time-sensitive, driving chargeable-weight-based pricing that accounts for both actual weight and volumetric weight, while ocean freight (particularly LCL) more directly reflects CBM-based space consumption.

Volumetric weight and dimensional weight are effectively synonymous terms describing the same underlying concept: a weight-equivalent figure derived from a shipment’s physical dimensions, used to ensure bulky, lightweight cargo is priced fairly relative to the space it occupies rather than purely by its actual weight. Container optimization and cargo consolidation both aim to maximize the useful cargo moved per container or per shipment, reducing the effective per-unit shipping cost by minimizing wasted space. Palletization (organizing cargo onto standardized pallets) improves handling efficiency and loading speed, though it does consume some of a container’s total volume with the pallets themselves, a tradeoff worth considering when maximizing volume efficiency is the primary goal.

Warehouse storage planning relies on the same CBM-based volume calculations this calculator performs, applied to inventory planning rather than active shipment planning. International shipping and freight forwarding more broadly involve considerable additional complexity beyond pure volume and weight calculation, customs documentation, import/export regulations, insurance, and multi-leg routing all layer on top of the core CBM and chargeable weight figures this calculator generates. Supply chain optimization at a strategic level increasingly incorporates CBM and volumetric efficiency considerations directly into product packaging design decisions, recognizing that packaging choices made early in a product’s lifecycle have lasting downstream effects on shipping cost efficiency across potentially millions of units shipped over a product’s commercial life.

Real-Life Applications

This freight volume calculator supports shipping and logistics decisions across the full range of industries that move physical cargo internationally. Import/export operations rely on accurate CBM calculation for customs documentation, freight quoting, and container planning at every shipment. Warehouse planning and container loading both benefit directly from this calculator’s volume-based approach, whether planning storage racking capacity or deciding how to fit a specific shipment into available container space. Air cargo and sea freight shippers apply the same underlying CBM math but through different pricing lenses: chargeable weight for air, direct CBM or weight for ocean, both fully supported through this calculator’s dedicated modes.

Courier shipments, medical logistics, and manufacturing operations all depend on accurate volume calculation for cost forecasting and carrier selection, particularly for time-sensitive or high-value cargo where getting the shipping mode and cost estimate right matters considerably. Retail and e-commerce fulfillment operations increasingly ship internationally at meaningful scale, making CBM-based cost estimation a routine part of sourcing and fulfillment decisions. Furniture shipping and industrial equipment transport frequently involve large, bulky, or irregularly shaped cargo where this calculator’s flexible package shape support (including cylinders and custom shapes) proves particularly valuable for accurate volume estimation beyond simple rectangular boxes.

Pallet CBM Calculations and Best Practices

Pallet CBM calculation deserves particular attention given how central palletized cargo is to modern freight handling, the Pallet CBM Calculator mode above uses standard pallet footprint presets (including the common 48″×40″ pallet and the 120×80cm Euro pallet) alongside a load height input to quickly calculate palletized shipment volume. A critical measurement detail applies here just as it does for freight class calculation: the height measurement should capture the full stack height from floor to top of load, including the pallet’s own height (typically 12-15 cm for a standard wooden pallet), not just the height of goods sitting on top of the pallet. Omitting the pallet’s own height is a common source of understated CBM for palletized shipments specifically.

Beyond accurate measurement, pallet loading efficiency itself affects overall shipment economics. Stacking cargo to make full use of a pallet’s footprint (rather than leaving substantial unused floor space on the pallet) and building to an appropriate height that balances volume efficiency against stability and any height restrictions for the intended transport mode both improve overall CBM efficiency per pallet. For shipments involving multiple pallets, the Multi-Package Calculator mode above supports modeling each pallet’s individual dimensions and quantity, generating both individual and aggregate CBM totals useful for both container planning and per-pallet cost allocation across a multi-pallet shipment.

Frequently Asked Questions

3 Real-Life Examples

Three different shipments, calculated the way the tool above does it.

Situation	Mode & inputs	Result	What it means
E-commerce seller shipping cartons via LCL	CBM mode: 45 × 35 × 30 cm cartons, 200 units.	0.0473 m³ per carton, 9.45 m³ total.	This total CBM figure is exactly what an LCL freight forwarder needs to generate a shipping quote, since LCL rates are typically priced per CBM.
Air freight shipper comparing volumetric and actual weight	Volumetric Weight mode: 80 × 60 × 50 cm box, 18 kg actual weight, IATA 6000 divisor.	40.00 kg volumetric weight, 40.00 kg chargeable weight.	Since the volumetric weight (40 kg) exceeds the actual weight (18 kg), this shipment bills at the higher volumetric figure, a classic case of bulky, lightweight cargo where packaging optimization could meaningfully reduce freight cost.
Importer checking whether a furniture shipment fits a 40′ High Cube	Container mode: 52.4 m³ total shipment, 40′ High Cube (76.3 m³ capacity).	68.7% container fill.	With nearly a third of the container’s capacity still available, this importer could potentially consolidate additional cargo into the same booking rather than paying for unused space.

These are illustrative calculations using the same formulas the calculator above applies. They’re a planning tool for estimating shipment volume and cost, not a substitute for a freight forwarder’s own quote before booking.

Important Notes

• These are volume and weight estimates, not a carrier’s final invoice. The arithmetic is exact given accurate dimensions, but actual freight charges depend on the carrier, trade lane, fuel surcharges, and accessorial fees beyond base CBM or chargeable weight pricing.
• Rounding. CBM figures typically display to two or three decimal places, matching the precision freight documentation and quotes conventionally use.
• Always measure external dimensions, including packaging. Carriers bill based on the outer shippable footprint, not the product’s internal dimensions, measuring only the product itself will understate true CBM.
• The volumetric divisor varies by carrier and mode. This calculator supports 5000, 6000, and 7000, confirm which one your specific carrier or trade lane actually uses before finalizing a chargeable weight estimate.
• Pallet height must include the pallet itself. Measuring only the goods stacked on top and omitting the pallet’s own height (typically 12 to 15 cm) understates palletized CBM.
• Container fill percentage reflects theoretical volume, not practical loading efficiency. Real-world stacking, bracing, and irregular cargo shapes mean a container rarely achieves 100% usable fill even when CBM math suggests it fits.
• Data privacy. All calculations run in your browser. Saved shipments are stored in your browser’s local storage, not on a server, and the PDF is generated locally on your device.

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