Free Export & Freight Planning Tool Shipping & Logistics

Shipment CBM Calculator

Calculate carton and shipment volume before requesting freight or container quotations.

Enter the external carton dimensions and number of cartons to calculate cubic metres (CBM), volume per carton and total shipment volume.

This calculator is designed for importers, exporters, sourcing teams, retailers, manufacturers and logistics teams planning international shipments of home textiles, rugs, cushions, bedding and other goods.

Free to use Instant estimate Built for sourcing & trade

CBM Shipment volume

Cartons Quantity based

B2B Built for import planning

Carton Length

Enter the external packed length of one carton.

Carton Width

Enter the external packed width of one carton.

Carton Height

Enter the external packed height of one carton.

Number of Cartons

cartons

Enter the total number of cartons in the shipment.

Use Packed Dimensions

For freight planning, use the external dimensions of the final packed carton, not the unpacked product dimensions.

Shipment Volume

Estimated Shipment Volume

Enter carton details

Add the packed carton dimensions and number of cartons to calculate shipment CBM.

Estimates generated by this calculator are for preliminary planning only. Actual manufacturing cost, finished weight, material consumption, packing, freight, duty, container utilization or other commercial results may vary according to construction, specifications, production method and supplier.

About this calculator

What Is a Shipment CBM Calculator?

CBM, or cubic metre, is one of the most important measurements used in international freight and container planning. It represents the amount of three-dimensional space occupied by a packed shipment.

Primeval's Shipment CBM Calculator helps buyers, exporters and logistics teams estimate shipment volume using carton dimensions and carton quantity. This can be useful when comparing freight quotations, estimating container utilization, evaluating packing efficiency and preparing early-stage logistics budgets.

The calculation is straightforward: convert carton length, width and height into metres, multiply them to calculate the volume of one carton, and multiply that figure by the number of cartons.

The result should be used as a planning estimate. Final freight quotations can also depend on gross weight, volumetric weight, palletization, carrier rules, route, commodity, Incoterm and actual packed dimensions.

Simple process

How to Calculate Shipment CBM

Enter your specifications and use the result as a practical starting point for product, sourcing and shipment planning.

Measure the packed carton length

Measure the longest external side of the final closed carton. Include the actual packed dimensions rather than product dimensions.

Measure carton width

Enter the external width of the packed carton using the same unit convention.

Measure carton height

Enter the final packed height, including any normal carton bulge or packing structure where applicable.

Enter the number of cartons

Add the total carton quantity expected in the shipment.

Calculate CBM per carton

The calculator converts the dimensions to metres and multiplies length × width × height.

Review total shipment volume

The per-carton CBM is multiplied by carton quantity to estimate the overall shipment volume.

CBM measures cubic metres. When carton dimensions are entered in centimetres, each dimension is first converted to metres before calculating volume.

Formula

Total Shipment CBM = Length (m) × Width (m) × Height (m) × Number of Cartons

What the values mean

Carton Length: External packed length of one carton.
Carton Width: External packed width of one carton.
Carton Height: External packed height of one carton.
Carton Quantity: Total number of cartons included in the shipment.
Cubic Metres: The three-dimensional shipment volume measured in cubic metres.

Practical examples

Shipment CBM Calculation Examples

See how typical values translate into a useful planning estimate.

Example 1

100 Cartons Measuring 60 × 40 × 35 cm

A common export-carton example for preliminary freight-volume planning.

Carton Size: 60 × 40 × 35 cm
Cartons: 100
CBM per Carton: 0.084 CBM

Result 8.40 CBM total shipment volume

Example 2

250 Cartons Measuring 50 × 40 × 30 cm

Smaller cartons can still create substantial total volume when shipment quantity increases.

Carton Size: 50 × 40 × 30 cm
Cartons: 250
CBM per Carton: 0.060 CBM

Result 15.00 CBM total shipment volume

Example 3

50 Large Rug Cartons Measuring 170 × 25 × 25 cm

Long cartons or rolled-rug packages can consume significant container volume despite relatively narrow cross-sections.

Carton Size: 170 × 25 × 25 cm
Cartons: 50

Result Approximately 5.31 CBM

Example 4

500 Cushion Cartons Measuring 55 × 45 × 40 cm

High-volume home-textile orders can require substantial freight space even when individual cartons are manageable.

Carton Size: 55 × 45 × 40 cm
Cartons: 500

Result Approximately 49.50 CBM

CBM Basics

What Does CBM Mean in Shipping?

CBM means cubic metre. It measures the volume occupied by a shipment rather than its physical weight.

In international freight, CBM is commonly used to describe the amount of cargo space required by cartons, crates, pallets or other packed units. One cubic metre represents a cube measuring one metre long, one metre wide and one metre high.

For ocean freight, shipment CBM is particularly important for LCL cargo and for estimating how much of a container a shipment may occupy.

Formula

How to Calculate CBM from Carton Dimensions

To calculate CBM, multiply the carton length, width and height after converting all dimensions to metres.

If dimensions are measured in centimetres, divide each dimension by 100 before multiplying them.

Step 1 Convert carton length from centimetres to metres.
Step 2 Convert width and height using the same method.
Step 3 Multiply length × width × height.
Step 4 Multiply CBM per carton by the total number of cartons.

Quick Reference

CBM Formula for Different Measurement Units

Common CBM Formulas

Dimension Unit	CBM Formula
Metres	Length × Width × Height
Centimetres	Length × Width × Height ÷ 1,000,000
Millimetres	Length × Width × Height ÷ 1,000,000,000

Example

CBM Example for a 60 × 40 × 35 cm Carton

A carton measuring 60 cm × 40 cm × 35 cm is equivalent to 0.60 m × 0.40 m × 0.35 m.

Multiplying these dimensions gives 0.084 CBM per carton. If the shipment contains 100 identical cartons, the total theoretical volume is 8.40 CBM.

Freight

Why CBM Matters in International Freight

Shipment volume influences freight planning because transport capacity is limited by physical cargo space as well as weight. Two shipments with the same gross weight can require very different amounts of cargo space.

Ocean Freight LCL freight is often quoted using volume or weight-based freight rules depending on the shipment.
Container Planning CBM provides an initial comparison between shipment volume and container capacity.
Air Freight Dimensions can affect volumetric or chargeable weight even when actual weight is relatively low.
Warehousing Shipment dimensions affect storage-space and handling requirements.
Transport Planning Truck and delivery capacity can also depend on cubic volume.

Ocean Freight

CBM in LCL Shipping

LCL means Less than Container Load. Instead of using an entire shipping container, a buyer's cargo shares container space with other shipments.

Shipment CBM is therefore an important early input when requesting LCL quotations. However, freight pricing may use a weight-or-measure rule, minimum charges, origin charges and destination charges in addition to basic volume.

FCL Shipping

Using CBM for Full Container Load Planning

For FCL shipments, buyers often compare estimated shipment CBM with approximate container capacity. This can help identify whether an order may fit into a 20-foot, 40-foot or 40-foot high-cube container.

However, dividing container capacity by shipment CBM does not provide a physical packing guarantee. Carton proportions, orientation, palletization, container dimensions, door clearance, void space and weight distribution all affect real loading.

Container Reference

Approximate Container Volume Reference

Container capacities vary by equipment specification and carrier. These figures are useful only as general planning references.

Typical Nominal Container Volume

Container Type	Approximate Internal Volume
20 ft Standard	About 33 CBM
40 ft Standard	About 67 CBM
40 ft High Cube	About 76 CBM
45 ft High Cube	About 86 CBM

Reality Check

Why 33 CBM Does Not Mean You Can Always Load 33 CBM into a 20-Foot Container

Nominal internal volume is not the same as practical loading capacity. Cargo rarely fills every cubic centimetre of a container because packed units do not always match the internal container dimensions perfectly.

Carton orientation The dimensions of cartons determine how efficiently they can be arranged.
Void spaces Unused gaps can remain between cartons or around container walls.
Palletization Pallets consume additional volume and can reduce usable cargo capacity.
Weight limits Dense goods may reach allowable payload limits before the container is volumetrically full.
Loading method Floor loading and palletized loading can have very different space utilization.

Home Textiles

CBM Planning for Home Textile Shipments

Home textiles can vary greatly in packing density. Cushion covers, throws, bedding, rugs and filled products may occupy very different volumes even when their commercial value is similar.

Cushion Covers Flat-packed unfilled covers generally consume relatively little volume compared with filled cushions.
Throws & Blankets Compression and folding method can materially affect carton dimensions.
Bed Linen Packaging format and retail presentation influence carton density.
Rugs Rolled carpets and rugs can consume substantial longitudinal container space.
Filled Cushions Bulky fill can create high CBM relative to product weight.

Packing Efficiency

How Packaging Can Reduce Shipment CBM

Packaging optimization can lower freight volume without changing the product itself. For import programmes with high freight costs, carton engineering can materially affect landed cost.

Improve folding Consistent folding can reduce unused carton space.
Optimize pieces per carton Carton quantity should balance compression, weight, handling and product protection.
Use suitable carton dimensions A carton designed around actual product dimensions can reduce internal voids.
Avoid excessive retail packaging Large individual packs can significantly increase shipment CBM.
Use compression where appropriate Certain soft goods can be compressed, subject to product-quality and presentation requirements.

Carton Dimensions

Use External Carton Dimensions, Not Internal Dimensions

Freight volume should normally be based on the outside dimensions of the final packed shipping unit. A carton supplier may provide internal and external measurements, but carriers handle the space occupied externally.

Measure the closed, packed carton rather than relying only on an empty-carton specification because packed cartons may change shape slightly.

Pallets

How Pallets Affect Shipment CBM

If cartons are palletized, the shipment volume should be calculated using the dimensions of the completed palletized load rather than simply adding individual carton CBM.

Pallet footprint, stacking pattern, total load height and overhang can change the actual volume presented to the carrier.

CBM vs Weight

CBM Is Not the Same as Shipment Weight

CBM measures volume, while kilograms measure mass. Freight decisions often consider both because a shipment can be light but bulky or compact but very heavy.

Light but bulky Filled cushions, pillows and some soft furnishings can have high volume relative to weight.
Heavy but compact Dense rugs, stone products or metal goods may reach transport weight limits with relatively modest CBM.

Air Freight

CBM and Volumetric Weight Are Different Calculations

Shipment CBM describes cargo volume. Air and courier carriers commonly convert package dimensions into a volumetric or dimensional weight using a carrier-specific divisor.

Use Primeval's Volumetric Weight Calculator separately when estimating chargeable air or courier weight.

Freight Quotation

Information to Send a Freight Forwarder

A meaningful freight request normally requires more information than shipment CBM alone.

Origin Factory location, port, ICD or airport where applicable.
Destination Destination port, airport or final delivery location.
Number of packages Total cartons, rolls, pallets, bales or crates.
Dimensions External dimensions of the packed units.
Gross weight Packed shipment weight, not only product net weight.
Commodity Description of the goods being transported.
Shipping mode Ocean FCL, ocean LCL, air, courier or another service.
Incoterm Clarify the commercial responsibility for freight and handling.

Buyer Strategy

Why Buyers Should Calculate CBM Before Confirming an Order

Freight can materially change the landed economics of an imported product. Knowing approximate shipment volume early allows buyers to evaluate packaging, order quantity and freight options before production is finalized.

Compare packing options Evaluate whether packaging changes could reduce shipment volume.
Estimate freight budget Use CBM when requesting preliminary LCL or container freight pricing.
Optimize order quantity An order can sometimes be adjusted to make better use of container capacity.
Estimate landed cost Freight allocation per unit can be calculated after establishing total shipment volume and freight charges.

Important

Shipment CBM Is a Planning Estimate

The calculator assumes all entered cartons have the same external dimensions. If a shipment contains multiple carton sizes, calculate each carton group separately and add the resulting CBM values.

Final freight bookings should use confirmed packing lists and actual packed measurements because production packing, compression, palletization and carton tolerances can change the final shipment volume.

For importers & buyers

Before Using CBM for a Freight Booking

CBM is an essential planning figure, but final shipping instructions should be based on actual packed cargo.

Use final external dimensions

Do not rely only on estimated product dimensions or internal carton measurements.

Separate different carton sizes

Calculate each carton type individually and add their total volumes.

Check gross weight

Transport can be limited by weight as well as volume.

Include pallets where applicable

Palletized cargo should be measured as the finished palletized unit.

Confirm container utilization

Nominal container volume is not the same as guaranteed loadable volume.

Use the final packing list

Update freight planning when production packing information is confirmed.

Source with Primeval

Planning a Home Textile Shipment from India?

Primeval helps international buyers source home textiles from Indian manufacturers. Along with product development and factory sourcing, buyers can use packing and shipment information to evaluate order economics before import.

Share your product specifications, quantities, target market and packaging requirements to move from preliminary calculations to an actual sourcing discussion.

Cushion covers
Rugs and carpets
Throws and blankets
Bed linen
Curtains
Kitchen textiles
Bath textiles
Table linen
Private-label products
Custom designs
Export packaging
Carton planning
Wholesale production
Sampling support

Buyer questions

Shipment CBM Calculator FAQs

Helpful answers about calculations, sourcing estimates and commercial planning.

What does CBM mean in shipping?

CBM means cubic metre. It measures the three-dimensional volume occupied by cargo.

How do I calculate shipment CBM?

Convert carton length, width and height to metres, multiply them to calculate CBM per carton, then multiply by the number of cartons.

What is the CBM formula for centimetres?

When all dimensions are in centimetres, multiply length × width × height and divide by 1,000,000 to calculate CBM per carton.

How do I calculate CBM for multiple cartons?

Calculate the volume of one carton and multiply it by the number of identical cartons.

How do I calculate CBM if cartons have different sizes?

Calculate each carton-size group separately and then add all of the group CBM totals together.

Should I use internal or external carton dimensions?

Use the external dimensions of the final packed carton because those dimensions represent the actual space occupied by the shipment.

Does CBM include carton quantity?

CBM per carton represents one packed unit. Total shipment CBM multiplies that value by the number of cartons.

How many cubic metres are in a 60 × 40 × 35 cm carton?

A 60 × 40 × 35 cm carton has a theoretical volume of 0.084 CBM.

What is the CBM of 100 cartons measuring 60 × 40 × 35 cm?

Each carton is 0.084 CBM, so 100 identical cartons equal approximately 8.4 CBM.

Is CBM the same as cubic metres?

Yes. CBM is commonly used as an abbreviation for cubic metre in freight and logistics.

Is CBM the same as cubic feet?

No. They are different units of volume. One cubic metre is approximately 35.315 cubic feet.

Does shipment weight affect CBM?

No. CBM measures physical volume independently of weight, although freight pricing and transport capacity can depend on both.

Is CBM used for ocean freight?

Yes. CBM is commonly used in ocean-freight planning, particularly for LCL shipments and container-utilization calculations.

What is LCL shipping?

LCL means Less than Container Load. Cargo from multiple shippers can share container space rather than one shipper booking the entire container.

What is FCL shipping?

FCL means Full Container Load. The shipper books a complete container rather than sharing space through an LCL service.

How many CBM fit in a 20-foot container?

A typical 20-foot standard container has nominal internal volume of roughly 33 cubic metres, but practical loadable volume is usually lower and depends on carton dimensions, weight and loading method.

How many CBM fit in a 40-foot container?

A typical 40-foot standard container has nominal internal volume of roughly 67 cubic metres. Actual usable space depends on cargo dimensions and loading efficiency.

How many CBM fit in a 40-foot high-cube container?

A typical 40-foot high-cube container has nominal internal volume of roughly 76 cubic metres, although real loadable capacity depends on the cargo.

Can I simply divide container CBM by carton CBM to calculate cartons per container?

That can provide a rough volume estimate, but it is not a reliable physical loading calculation because carton orientation, voids, weight, door clearance and palletization matter.

Does palletization change shipment CBM?

Yes. For palletized freight, calculate volume using the external length, width and total height of each loaded pallet.

Can compression reduce shipment CBM?

For certain soft goods, compression can reduce packed dimensions, but the method must be compatible with product-quality and presentation requirements.

Is CBM used for air freight?

Cargo volume matters in air freight, but carriers commonly calculate volumetric or dimensional weight using package dimensions and a service-specific divisor.

What is the difference between CBM and volumetric weight?

CBM measures cargo volume in cubic metres. Volumetric weight converts package dimensions into a weight equivalent used for certain freight calculations.

Can I use CBM to calculate freight cost?

CBM is an important input for some freight quotations, but actual cost also depends on route, freight mode, weight, carrier, commodity, minimum charges, origin and destination fees.

Can I use CBM to calculate freight cost per product?

Yes after obtaining the shipment freight cost. Freight cost can be allocated across the units in the shipment, although the allocation method should reflect the commercial purpose.

Should I calculate CBM before placing a wholesale order?

It is useful to do so because packing and freight volume can materially affect landed cost and container utilization.

Can this CBM calculator be used for rugs and carpets?

Yes, provided you enter the external dimensions of the actual rolled, folded or carton-packed shipping unit.

Can this calculator be used for cushion-cover shipments?

Yes. Enter the final master-carton dimensions and total carton quantity.

Does this calculator calculate container loading exactly?

No. It calculates shipment volume. Use a container-loading calculator for an additional capacity estimate, and confirm final loading with actual cargo and logistics providers.

Is the calculated shipment CBM final?

No. It is a planning estimate. Final freight bookings should use confirmed packed dimensions from the production packing list.

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Home Textile Sourcing & Export Planning

Planning an Order from India? Move from CBM to Actual Factory Pricing.

Share your product specifications, quantity, packaging, target market and delivery requirements with Primeval. Use the Shipment CBM Calculator for early freight planning, then move to an actual manufacturing and sourcing discussion.

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