Chargeable Weight Calculator
Enter each box. See the weight you'll be billed on.Enter each box. See the weight you'll be billed on, with each carrier's 2026 divisor and rounding — air freight, FedEx, UPS, DHL, USPS and LCL.
UPS · Daily rates · ÷139 in³/lb · each package
UPS rounds each side up to the next inch and each weight up to the next pound, then bills each package on the higher of dimensional and actual.
Box by box
| Box | Entered | As UPS measures it | Dimensional each | Actual each | Billable each | Qty | Line |
|---|---|---|---|---|---|---|---|
| Box A | 12.2 × 10.1 × 8.3 in | 13 × 11 × 9 in | 9.26 → 10 lb | 6 lb | 10 lb | 2 | 20 lb |
| Box B | 24 × 16 × 12 in | 24 × 16 × 12 in | 33.15 → 34 lb | 18 lb | 34 lb | 1 | 34 lb |
| Total | 7,182 in³ · 0.118 m³ | 54 lb | 30 lb | 3 | 54 lb |
- Box A · 13 × 11 × 9 indim 9.26 → 10 lb · actual 6 lb · ×220 lb
- Box B · 24 × 16 × 12 indim 33.15 → 34 lb · actual 18 lb · ×134 lb
Lighter than 12.4 lb per cubic foot? With ÷139 you pay for space, not weight.
Same boxes, other carriers
Weights, not pricesDivisors change. USPS moved from 166 to 139 on July 12, 2026; FedEx and UPS now round every fraction of an inch up. We checked each carrier's own page on October 13, 2026 — links below. Confirm with your carrier before you quote.
The calculator stays free. The trial turns these boxes into packing list lines — no card, then from $15 a week.
How each carrier counts it
Each preset follows the carrier's own 2026 document. Checked Oct 13, 2026. Rates and rules change — confirm with your carrier before you quote.
- Air cargo (IATA)÷6,000 cm³/kg
Air cargo rounds each side to the nearest cm, adds up the whole shipment, divides by 6,000 and rounds the weight up to the next half kilogram.
IATA — air cargo rulesTACT 3.9.4 rounding, as quoted by ASEAN - FedEx÷139 in³/lb
FedEx rounds every fraction of an inch up, divides by 139 and rounds up to the next pound — per package or per shipment, depending on how your shipment is billed.
FedEx Service Guide 2026 - FedEx · metric÷5,000 cm³/kg
FedEx rounds each side up to the next cm and divides by 5,000. Its page does not say how the kilograms are rounded, so they are not rounded here — check with FedEx.
FedEx — calculate dimensional weight (metric) - FedEx International Deferred Freight÷166 in³/lb
For International Deferred Freight FedEx divides by 166 instead of 139, still rounding every fraction of an inch and pound up.
FedEx Service Guide 2026 - UPS · Daily rates÷139 in³/lb
UPS rounds each side up to the next inch and each weight up to the next pound, then bills each package on the higher of dimensional and actual.
UPS Rate & Service Guide 2026UPS — dimensions and weight - UPS · Retail rates÷166 in³/lb
UPS Retail divides by 166 instead of 139. Sides and pounds are rounded up as in the 2026 guide, and each package is billed on its own.
UPS Rate & Service Guide 2026UPS — dimensions and weight - USPS÷139 in³/lb
USPS rounds each side up to the next inch. Only a parcel over 1 cubic foot (1,728 in³) gets a dimensional weight (÷139, up to the next pound); smaller ones go by actual weight.
USPS Postal Bulletin 22705 - DHL Express÷5,000 cm³/kg
No rounding applied — DHL does not publish how it rounds sides or weight. Check with DHL before you quote.
DHL Express Weights & Dimensions 2026DHL Express — volumetric weight - Sea LCL (W/M)1 m³ = 1,000 kg
LCL is charged per revenue ton (W/M): cubic metres or metric tonnes, whichever is greater, on the actual dimensions. Some tariffs use another ratio — use a custom divisor for those.
Crowley Tariff 003, Rule 2
Not here on purpose: a road-freight preset (the 1:3,000 figure some sites use has no carrier source we could find) and DHL's rounding (not published). Use Custom divisor with the number your carrier gives you.
Frequently asked questions
What is chargeable weight?
The weight a carrier bills you on: the higher of the actual weight and the volume (dimensional) weight. DHL Express puts it this way — whichever of the two is higher counts as the weight of your shipment.
What divisor do UPS and FedEx use in 2026?
UPS divides by 139 (in³ per lb) for Daily Rates and by 166 for Retail Rates (Rate & Service Guide effective September 7, 2026). FedEx divides by 139, and by 166 for FedEx International Deferred Freight (Service Guide 2026). FedEx in centimetres divides by 5,000.
Do FedEx and UPS round the dimensions?
Yes — every fraction of an inch goes up to the next inch (FedEx since August 18, 2025; UPS: "1.1 will be considered 2"). A 12.2 × 10.1 × 8.3 in box is measured as 13 × 11 × 9 in: 1,287 in³ ÷ 139 = 9.26, billed as 10 lb. Without rounding it would be 7.36 lb, so the rounding alone adds about 36%.
When does USPS charge dimensional weight?
Only for a parcel over 1 cubic foot (1,728 in³). Since July 12, 2026 the divisor is 139 (it was 166). A smaller parcel is billed on its actual weight.
What is the volumetric ratio for air freight?
IATA's general rule is the shipment's volume in cubic centimetres divided by 6,000 (1 m³ ≈ 167 kg). Under the TACT rules, as quoted in ASEAN's training material, sides go to the nearest centimetre and weights up to the next half kilogram. Your airline or forwarder may use another divisor — choose Custom divisor for that.
How does DHL Express calculate volumetric weight?
Length × width × height in cm ÷ 5,000 (200 kg per m³), per DHL Express's 2026 weights and dimensions sheet, valid from April 1, 2026. That sheet does not say how DHL rounds, so this calculator does not round DHL — check with DHL before you quote.
How is LCL sea freight charged?
Per revenue ton (W/M): cubic metres or metric tonnes, whichever is greater, with 1 m³ = 1,000 kg — the rule in Crowley's tariff, on the actual dimensions. The same tariff also lists other ratios (CBM/500 kg, CBM/2,000 lb, CFT/100 lb), so 1:1,000 is common but not universal. For 1 m³ = 500 kg, use a custom divisor of 2,000 cm³/kg.
Why does per package vs per shipment matter?
Take box A, 30 × 30 × 30 cm and 20 kg, and box B, 60 × 50 × 50 cm and 3 kg, at ÷5,000. Counted as one shipment: 177,000 cm³ ÷ 5,000 = 35.4 kg against 23 kg actual, so 35.4 kg. Counted box by box: A bills its 20 kg actual, B its 30 kg of volume — 50 kg, about 41% more. UPS and USPS bill each package; FedEx bills per package or per shipment; air cargo and DHL Express count the whole shipment.