About.

GirthCalculator.com is a free utility site offering two calculators for two contexts where the word "girth" matters: parcel shipping and body measurement.

Why two calculators on one site?

Most people searching for "girth calculator" know exactly which meaning they need — they're either holding a parcel they're about to ship, or they have a tape measure around their bicep. The two contexts rarely overlap, but they share the same word. Rather than fight for ranking on a single meaning, this site serves both clearly and lets users self-route on the homepage.

How accurate is the data?

Carrier size limits are sourced from each carrier's published rate guide. Limits change periodically — always verify against the carrier's current documentation before shipping high-value items. Body measurement formulas (US Navy body fat, WHR, McCallum proportions) cite their original published sources; these are estimation tools, not medical diagnoses.

How is the site funded?

Display advertising. The site is free to use, with no premium tiers, no account signup, no email capture. We do not sell user data because we never collect any — see the privacy policy.

Contact

For corrections, broken calculations, or carrier limit updates: see the contact page or email contactus@girthcalculator.com.