UPS Dimensional Weight Calculator
UPS publishes an imperial dimensional-weight formula of length × width × height divided by a rate-specific divisor. Its U.S. guidance identifies 139 for Daily Rates and 166 for Retail Rates.
UPS Daily and Retail Rate divisors
UPS’s U.S. shipping-dimensions guidance says to round each measurement to the nearest whole inch, calculate cubic size, and divide by the applicable factor. It lists 139 for Daily Rates and 166 for Retail Rates.
Using 166, the same carton produces 15.18 lb before rounding. This is why choosing the divisor from the correct UPS rate type matters.
UPS billable weight
UPS describes billable weight as the weight used to calculate the rate and generally compares dimensional and actual weight. Additional minimums, package rules, surcharges, and rounding can still affect the final charge.
Official UPS reference
See UPS shipping dimensions and weight guidance. Then check the current UPS Rate and Service Guide and your agreement for the shipment’s rate type.
Frequently asked questions
Does UPS use 139 or 166?
UPS U.S. guidance lists 139 for Daily Rates and 166 for Retail Rates; use the divisor tied to your applicable rate type.
How does UPS measure dimensional weight?
UPS instructs users to measure at the longest points, round measurements as directed, multiply the dimensions, and divide by the applicable factor.
Is UPS dimensional weight always the final billed weight?
Not necessarily. Actual weight, minimums, rounding, service rules, and surcharges may affect billable weight.