Dimensional Weight Calculator
Calculate the volumetric weight to determine your package's billable weight.
Your Shipping Result
Couriers charge based on the greater of actual or dimensional weight.
Calculate Dimensional (Volumetric) Weight
Enter a parcel's length, width, and height plus your carrier's DIM divisor to get its volumetric weight — the billable weight couriers use for bulky, lightweight shipments.
Compare the dimensional weight against the actual scale weight: carriers charge whichever is greater. The math runs instantly in your browser.
Any unit system
Work in centimeters or inches — the calculator handles metric and imperial DIM divisors correctly.
Billable weight verdict
See dimensional vs. actual weight side by side so you know exactly what the carrier will charge for.
Free and private
The calculation runs entirely in your browser — no signup and no data sent anywhere.
How to use
- Enter the parcel's length, width, and height.
- Set the DIM divisor your carrier uses.
- Click Calculate to see the dimensional and billable weight.
Frequently Asked Questions
What is dimensional (volumetric) weight?
A formula carriers use to price bulky, light packages: (length × width × height) ÷ DIM divisor. You are billed on whichever is higher — actual or dimensional weight.
What DIM divisor should I use?
It varies by carrier and service — common values are 5000 (cm³/kg) for international air freight and 139 (in³/lb) for US domestic express. Check your carrier's rate guide.
Why do carriers use dimensional weight?
Because a large light box takes up the same truck or plane space as a heavy one — DIM pricing reflects the space your parcel occupies.
Is my data sent anywhere?
No. The calculation happens locally in your browser.
Is the calculator free?
Yes, free with no signup.
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