Parcel girth calculator.
Enter your package dimensions to see length plus girth and check it against seven major carriers at once. Supports box and tube shapes, metric and imperial.
Length + Girth Calculator
Fee estimates are sourced from each carrier's published 2026 rate documentation, linked above. Some carriers (DHL, Canada Post) trigger their handling fee based on an individual side length rather than combined length+girth — this calculator checks length+girth only, so a fee could apply even when a row shows OK. Fees change seasonally (especially UPS, FedEx, USPS) and vary by account type and shipping zone; always confirm the exact charge with the carrier before shipping.
Embed this calculator on your site
Free to use on any e-commerce or blog site. Paste this snippet where you want the calculator to appear:
Preview
Carrier limits compared
Every major carrier publishes a maximum combined length plus girth. Exceeding the limit triggers either oversize surcharges or outright rejection.
| Carrier | Max length + girth | Details |
|---|---|---|
| UPS Ground | 165 in / 419 cm | View → |
| FedEx Ground | 165 in / 419 cm | View → |
| USPS | 108 in / 274 cm | View → |
| DHL Express | 157 in / 399 cm | View → |
| Royal Mail | 118 in / 300 cm | View → |
| Canada Post | 118 in / 300 cm | View → |
| Australia Post | 55 in / 140 cm | View → |
How girth is calculated
For a rectangular box, girth equals twice the sum of the two smaller dimensions:
girth = 2 × (width + height)
length + girth = length + 2 × (width + height)
For a cylindrical tube, girth is the circumference of the circular cross-section:
girth = π × diameter
length + girth = length + π × diameter
Always measure outer dimensions of the finished package, including any padding, wrapping, or protrusions. Carriers round up to the next whole inch when verifying.
Sources & standards
Full citation and verification date for each carrier's fee estimate is also shown inline next to that carrier's result above. This section collects all seven in one place:
- UPS — Avoid Additional Shipping Fees — verified 2026-08-03 source
- FedEx — 2026 Surcharge and Fee Changes (official PDF) — verified 2026-08-03 source
- USPS Notice 123 — Price List (Postal Explorer) — verified 2026-08-03 source
- DHL Express — Service & Rate Guide 2026, United States — verified 2026-08-03 source
- Canada Post — Features, Options and Other Surcharges — verified 2026-08-03 source
- Australia Post — Business Pricing Updates — verified 2026-08-03 source
- Royal Mail — official parcel size and pricing guidance — no single downloadable rate-card PDF published source