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Shipping cost calculator
Enter the packed parcel, the carrier divisor and the rate you were quoted. The calculator returns dimensional weight, billable weight and an itemised cost.
Defaults are illustrative, not a carrier quote. Rates, divisors, rounding and accessorials change; confirm the current tariff for the service you use.
What the calculator counts — and what it does not
It counts actual weight, dimensional weight, the billable weight after rounding, the base transport charge, a percentage fuel surcharge, an optional residential or delivery-area fee, declared-value insurance and any other accessorial you enter.
It does not know the carrier zone table, the current fuel index, the remote postcode list or the exact rounding rule. Treat the result as a planning number and replace it with a real quote for a high-volume lane.
Why the divisor changes the answer
The divisor converts box volume into a weight-equivalent. A lower divisor produces a higher dimensional weight, so a bulky parcel is billed more. UPS and FedEx commonly use 139 cubic inches per pound; USPS commonly uses 166.
Keep inches and pounds consistent. If you enter centimetres or kilograms, convert first; otherwise the result will look plausible but be wrong.
The lines to add before quoting a buyer
Add residential and remote-area surcharges for the actual destination, address-correction risk and the cost of a failed delivery or return. For cross-border sales, add duty and import tax separately; they are not part of the carrier charge.
If the product is light and bulky, reducing the box volume is often a bigger saving than negotiating the rate. Test the packed parcel, not the flat product.
Shipping cost reference — all entries
Every entry links to its full reference page. The search box above filters this list.
Frequently asked questions
Which dimensional divisor should I use?
Use the divisor published for your carrier and service. UPS and FedEx commonly use 139 cubic inches per pound; USPS commonly uses 166.
Does the result include customs duty?
No. Duty and import tax are separate. Use the landed-cost calculator for those lines.
Why is the cost per kilogram higher than the rate per pound?
Because the billable weight can be dimensional, and fuel, residential and insurance lines add cost without adding weight.
Can I use this for DHL Express?
The 139 divisor is close to DHL’s 5000 cm³/kg rule, but DHL publishes its own tariff and rounding. Use the calculator as an estimate and confirm with DHL.
Ask a compliance question
Free first answer by email. Tell us the destination, the product and the channel — we will point you to the rule and the official source. No obligation, no sales sequence.