DIMENSIONAL WEIGHT
How to Calculate Dimensional Weight
Dimensional weight turns package size into a billable weight so that low-density freight is priced for the space it occupies.
SHORT ANSWER
Start with the inputs you can verify
Dimensional weight turns package size into a billable weight so that low-density freight is priced for the space it occupies.
What the estimate means
Measure the packed outside dimensions, not the product alone.
Use the divisor and rounding rules supplied by the carrier or tariff.
Where estimates go wrong
Compare dimensional weight with actual scale weight; the larger value is usually billable.
Keep the source measurements and assumptions with the result so another person can review or update the estimate later.
A practical workflow
- Measure and record length, width, and height in the carrier’s required unit.
- Multiply the dimensions and divide by the current carrier divisor.
- Apply the carrier’s rounding rule, then compare the result with actual weight.