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Package measurement tool

Package Girth Calculator

Calculate package girth and length plus girth. The longest side is automatically treated as the package length.

Package dimensions

Formula
Girth = 2 × (width + height)

Why length plus girth matters

Parcel carriers can use length-plus-girth thresholds when determining whether a package is oversized. Thresholds vary by carrier and service, so use the measurement here and compare it with the current published carrier limit.

Worked example

For a 24 × 16 × 12 inch package, the longest side is 24 inches. Girth is 2 × (16 + 12) = 56 inches, so length plus girth is 80 inches.

Frequently asked questions

Which side is package length?

For a rectangular package, this calculator automatically treats the longest entered side as length and uses the other two sides to calculate girth.

Does this tell me whether a parcel is oversized?

It gives you the measurement needed for an oversized-package check. Compare the result with the current size limits for the carrier and service you plan to use.