Compare actual and volumetric weight to estimate billable shipment weight. Change any input below and the estimate updates instantly.
Dimensional weight = length × width × height ÷ carrier divisor. Billable weight is usually the greater of actual and dimensional weight.
The calculator runs locally in your browser. Values are estimates and are not sent to Margin Manifest.
Carriers use different divisors, rounding, service rules, and oversized-package charges. Enter the divisor from your carrier contract.
Last reviewed: October 2026. Always verify current account-specific rates.
Carriers compare the parcel's physical weight with a size-based dimensional weight. The larger value is commonly used as the starting point for billing. Reducing empty space can therefore save more than reducing a small amount of product weight.
Use the divisor stated by the carrier for your service and contract. Common examples are only defaults and may not match your rate card.
The parcel occupies more vehicle or aircraft space than its scale weight would suggest, so the carrier prices it by volume.
Follow the carrier's measurement and rounding rules. Rounding each dimension can produce a different result from rounding only the final weight.
Related tools: Etsy Fee Calculator · Amazon FBA Profit Calculator · eBay Fee Calculator