What is dimensional weight?
Dimensional weight, also called volumetric weight, converts package volume into a reference weight. It helps describe how much space a shipment occupies relative to its physical weight.
Free freight weight tool
Dimensional Weight Calculator
Calculate dimensional weight in kg or lb with reference divisors or a custom value. See the formula, worked examples, and provider-rule limitations.
Dimensional weight formula
Metric: L × W × H (cm) ÷ divisor = kg
Imperial: L × W × H (in) ÷ divisor = lb
Divisors vary by provider and transport mode. Select a reference option or enter the rule you need.
How to calculate dimensional weight
Multiply length, width, and height in one compatible unit system, divide by the selected divisor for one package, then multiply by the number of identical packages.
Metric example
50 × 40 × 30 cm ÷ 5000 = 12 kg per package. Two identical packages total 24 kg of dimensional weight.
Imperial example
20 × 15 × 10 in ÷ 139 ≈ 21.583 lb per package. Three identical packages total about 64.748 lb.
Choose the divisor deliberately
A dimensional divisor is a density conversion rule, not a universal constant. The listed values are reference options; verify the current rule for the relevant provider, service, and transport mode.
Dimensional, actual, and chargeable weight
Actual weight comes from a scale. Dimensional weight comes from package volume and a divisor. Chargeable weight may compare those values and apply separate minimums or rounding rules, so this tool does not calculate it.
Dimensional weight is not CBM
CBM measures shipment volume in cubic metres, while dimensional weight converts volume into a reference weight. Calculate shipment volume with the CBM tool.
Dimensional weight calculator FAQs
What is the dimensional weight formula?
Multiply package length by width by height, divide by a compatible dimensional divisor, and multiply the per-package result by the quantity when the packages are identical.
Which dimensional divisor should I use?
Use the divisor specified for the relevant provider, service, and transport mode. The 5000, 6000, 139, and 166 options here are references, not universal or official rules.
Is dimensional weight the same as actual or chargeable weight?
No. Actual weight is measured on a scale. Chargeable weight may compare actual and dimensional weight and apply separate minimum or rounding rules.
Is dimensional weight the same as CBM?
No. CBM is a volume measurement in cubic metres. Dimensional weight uses package volume and a divisor to produce a reference weight in kilograms or pounds.
Use the estimate as route-research context
Continue to compare China-to-global route information after verifying the divisor. Route information is research guidance, not a binding freight quote.