CBM Calculator & Dimensional Weight

Multiply length × width × height in meters, then by the number of cartons. A 100 × 100 × 100 cm box is 1 × 1 × 1 = 1 m³; three of them are 3 m³. For a 60 × 40 × 40 cm carton: 0.6 × 0.4 × 0.4 = 0.096 m³.

A weight carriers charge for bulky, light parcels: length × width × height divided by a divisor. With centimeters and a 5,000 divisor, a 100 cm cube has a dimensional weight of 1,000,000 ÷ 5,000 = 200 kg. You're charged on whichever is higher — actual or dimensional weight.

The one on your carrier's rate card for that service — commonly 5,000 or 6,000 cm³/kg, or 139 or 166 in³/lb. A cm³/kg divisor must be used with centimeters and an in³/lb divisor with inches; the calculator converts your dimensions to match automatically.

Parcel carriers usually compare actual and dimensional weight for each package. Freight and some multi-piece services compare the shipment's totals once. Pick the option that matches your service.

No. It's the weight a carrier would likely charge on. Prices also depend on zones, minimum charges, surcharges and how the carrier measures and rounds.

Convert each dimension to meters first (1 inch = 0.0254 m), or multiply in cubic inches and divide by 61,023.7. A 24 × 16 × 12 in carton is 0.0755 m³, or 2.67 ft³. Choose “in” as the unit and the calculator converts for you.

One cubic meter is 35.31 cubic feet, and one cubic foot is about 0.0283 m³. The calculator shows the shipment's volume in both.

As a rough guide, a standard 20ft container holds about 33 m³ inside, a 40ft about 67 m³ and a 40ft high cube about 76 m³. Because cartons never fill every gap, plan on loading noticeably less — often around 25–28 m³ in a 20ft and 55–58 m³ in a 40ft. Check your carrier's figures for the exact container type.

Less-than-container-load freight is usually charged per “revenue ton”: whichever is greater of the volume in cubic meters or the weight in metric tons, often written W/M. A 2 m³ shipment weighing 800 kg is charged as 2 revenue tons. Use the total m³ and actual weight here to compare them.

Yes, if you choose a rounding step. Many carriers round up to the next 0.5 kg or whole kilogram (or pound), so a 45 × 35 × 30 cm box weighing 7 kg — 9.45 kg dimensional — is billed as 9.5 kg with 0.5 rounding. Pick no rounding, 0.5 or 1 to match your carrier.

The packed box. Measure the outside of the carton at its longest, widest and tallest points, including any bulges, or the pallet if it ships on one. Carriers often round each dimension up to the nearest whole centimeter or inch before calculating; the calculator uses exactly what you enter, so round up yourself if your carrier does.

Yes — import a CSV with columns name, length, width, height, unit, quantity, weight and weight_unit. The file is read in your browser and isn't uploaded. Export gives the same columns plus the results.