Free browser-based tool
Free Shipping Weight Calculator
Estimate chargeable shipping weight by comparing actual weight with volumetric weight for courier, air freight, and freight quote discussions.
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Result
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How this helps
Estimate chargeable shipping weight by comparing actual weight with volumetric weight for courier, air freight, and freight quote discussions. The goal is to make the first working draft clear enough to review, share, and improve instead of starting from a blank document.
Real-world example
A carton measuring 50 x 40 x 30 cm has volumetric weight of 12 kg with a 5000 divisor. If the actual weight is 8 kg, the chargeable weight is usually 12 kg before carrier-specific rules.
Common mistakes
- Confusing CBM with volumetric weight.
- Forgetting that carriers can use different divisors.
- Using product net weight instead of packed carton gross weight.
Shipping Weight Calculator: what the result means
Compare scale weight with volumetric weight to see which figure may become the chargeable weight for air express or air freight. The calculator keeps CBM and volumetric weight separate so the result is easier to explain to a carrier.
A realistic way to use it
For a 50 x 40 x 30 cm carton, the express-style estimate is 50 x 40 x 30 / 5000 = 12 kg. If the carton actually weighs 8 kg, a carrier using divisor 5000 may quote against 12 kg.
Checks that prevent a bad result
Do not call 0.06 CBM a weight. Confirm whether actual weight is per carton or for the full shipment, and use the carrier divisor shown in the quote rather than assuming 5000 always applies.
Confirm the number the carrier may actually bill
The higher figure is often the starting chargeable weight, but the divisor, rounding method, and piece-by-piece rules come from the service quote.
| Decision point | Compare | Action before booking |
|---|---|---|
| Actual vs volumetric | Scale weight against the dimensional result | Plan from the higher figure unless the carrier confirms another rule. |
| Divisor | 5000, 6000, 139, or the factor printed in the quote | Use the contracted service factor instead of a remembered default. |
| Rounding | Per parcel rounding versus shipment-total rounding | Ask how fractional kilograms and multiple pieces are handled. |
| Oversize exposure | Longest side, girth, and service limits | Check for oversize or additional-handling charges outside the weight formula. |
Before you act: save the carrier divisor and rounding rule beside the result so the estimate can be reconciled with the invoice later.
When this tool is not enough
Carrier rounding, minimum charges, oversize surcharges, route rules, and account-specific divisors can change the billable result. Ask the carrier or forwarder to confirm the final basis.
Frequently asked questions
Which weight is normally charged?
Many carriers use the higher of actual and volumetric weight, subject to their own rules and rounding.
Do all carriers use divisor 5000?
No. Divisors vary by carrier, service, route, and contract.