U.S. rectangular parcel comparison
20 × 15 × 10 in; actual 12 lb
Calculation: ceil(3000 ÷ 139) = 22; ceil(3000 ÷ 166) = 19
Expected: 22 lb FedEx, UPS Daily and USPS Ground Advantage; 19 lb UPS Retail, before other rating rules
Load these inputs →Carrier comparison
Dimensional Weight Calculator
Compare U.S. FedEx, UPS Daily, UPS Retail and USPS Ground Advantage base dimensional weights.
Live calculator
Rectangular packages; published rules checked October 10, 2026.
Compare U.S. parcel base weights
Dimensions round up to whole inches; fractional pounds round up. Rounded volume: 4,480 in³.
This compares base weight only. Additional handling, large-package minimum weights, oversize pricing, service limits and negotiated terms can change the rate.
Sources: FedEx 2026 guide, pp. 135–136; UPS dimensions and weight; USPS DMM 283 §1.4.2. USPS scope here: commercial Ground Advantage, rectangular, zones 1–9. Its divisor is 139, effective July 12, 2026. Sub-pound ounce tiers and cubic pricing are not modeled.
Your estimate
FedEx U.S. parcel (139)33 lbDIM 33 lb
UPS Daily (139)33 lbDIM 33 lb
UPS Retail (166)27 lbDIM 27 lb
USPS Ground Advantage (139)33 lbDIM 33 lb
Planning estimate only. Confirm measurements, rounding, service rules, payload, and rates with the carrier.
Load a worked example
Each link fills the calculator with the measurements shown. Change a value to see what changes. Reference examples are covered by automated calculation checks; they are not physical shipping tests.
USPS rounded volume threshold
12.1 × 12 × 12 in; actual 8 lb
Calculation: 13 × 12 × 12 = 1872; ceil(1872 / 139) = 14
Expected: 14 lb USPS Ground Advantage base comparison
Load these inputs →A carrier comparison starts with the same packed box
Enter one set of dimensions in inches and the actual weight in pounds. The comparison applies each displayed preset to that same box. Differences reflect the preset's divisor, threshold and rounding rules, not a price comparison between carriers.
A base billable weight is only one part of a shipping quote. The displayed results exclude charges and service conditions identified below the calculator. Check the linked carrier sources and your current contract before relying on a preset.
Use the volumetric-weight calculator when you already know the divisor you need. Use package girth when the question is whether length plus girth meets a service's dimensional limit; that measurement is separate from DIM weight.
A clear answer from the numbers you already have.
Compare common published parcel divisors with one set of dimensions. The calculator shows the base weight before surcharges and minimum-weight rules for each preset and keeps USPS's one-cubic-foot threshold visible.
FormulaBillable weight = greater of actual weight and rounded-up dimensional weight
How to use this calculator
- 1
Enter outer package dimensions in inches.
- 2
Add the actual scale weight in pounds.
- 3
Review each carrier preset and confirm the applicable rule before shipping.
What to check before booking
The result is a planning estimate, not a freight quote or load-safety approval. Measure the finished package, confirm the correct carrier service and divisor, and apply the rounding method in your current contract. For pallets and containers, also verify maximum payload, door clearance, stacking strength, load restraint, and local transport rules.
Equipment specifications and tariff rules can change. Cargoivo keeps common presets visible while letting the carrier's own documentation remain the final authority.
Calculator behavior is checked with repeatable examples documented in How We Test and the Cargoivo Lab.
Learn the method
All shipping guides →Guides for this calculation
Dimensional weight
DIM Divisor 139 vs 166: What Changes?
See how two common dimensional-weight divisors change the billed-weight estimate for the same parcel.
2 min read →Dimensional weightFedEx-Style Dimensional Weight Example
See how an inch-based 139 divisor changes the planning weight of a bulky parcel.
1 min read →Dimensional weightUPS-Style DIM Weight Example
Compare 139 and 166 divisors on one package to understand rate-program differences.
1 min read →Frequently asked
Dimensional Weight Calculator FAQ
Does FedEx use a 139 DIM divisor?+
FedEx publishes 139 as a common imperial divisor. Contract terms and services can differ.
What divisors does UPS use?+
UPS publishes 139 for Daily Rates and 166 for Retail Rates in its U.S. guidance.
When does USPS DIM weight apply?+
Commercial USPS Ground Advantage rectangular parcels over 1,728 cubic inches use divisor 139 under DMM 283, effective July 12, 2026. Dimensions and dimensional pounds round up. The comparator lists its scope and exclusions.
Keep planning
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01Courier planning
Volumetric weight
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Open calculator →02Parcel limitsLength + girth
Calculate girth and combined length plus girth for parcel size checks.
Open calculator →03Freight ratingChargeable weight
Find the higher of actual and volumetric weight for air or express freight.
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