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DimCheck

Check How Carriers See Your Package

See how FedEx, UPS, USPS, and DHL may bill your package — dimensional weight, surcharge thresholds, and safer box sizes. Rules verified against official carrier documentation.

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Use a custom DIM divisor only if your shipping agreement specifies one. It applies only to this calculation — official carrier rules are never changed.

Safety allowance is a planning buffer for packaging variation, not a prediction of carrier measurement error.

Monthly shipments power the Business Impact metric (excess billable weight × volume).

How it works

  1. 1

    Enter your package

    Dimensions, actual weight, carrier.

  2. 2

    Diagnose the result

    Billable weight, DIM excess, surcharge thresholds.

  3. 3

    Optimize the box

    Find smaller dimensions that bill less.

Want the details? Read the methodology or browse every carrier rule and its official source.