ShippingCowWhich carrier size rules does your carton trigger?
Enter one carton. See which FedEx, UPS and USPS size and weight rules it trips, the number that trips each one, and the carrier page it comes from.
How the checker works
Enter the packed carton's length, width, height and weight. The checker compares them with the 2026 size and weight rules UPS, FedEx and USPS publish, and shows which rules the carton trips, the number that trips each one, and the carrier page the rule comes from.
It works out dimensional weight with the 139 divisor, length plus girth (the longest side plus twice each of the other two) and cubic volume, then checks each against the Additional Handling, Large Package or Oversize, and maximum-size lines.
It shows rules, not prices. What you pay depends on your carrier contract, the zone and the week, so the next step is a Saving Audit on your real shipments.
Questions
What is dimensional weight? +
The space a carton takes up, converted to pounds: length times width times height in inches, divided by the carrier's divisor. FedEx, UPS and USPS Ground Advantage all use 139. You are billed on the greater of the actual weight and the dimensional weight.
What triggers Additional Handling? +
At FedEx and UPS, any one of: actual weight over 50 lb, a longest side over 48 in, a second-longest side over 30 in, length plus girth over 105 in, or more than 10,368 cubic in. Packaging that is not a fully enclosed corrugated box triggers it too.
What is a Large Package or Oversize? +
UPS calls it a Large Package and FedEx an Oversize package: length plus girth over 130 in, a longest side over 96 in, more than 17,280 cubic in, or an actual weight over 110 lb. Both bill it at a 90 lb minimum.
What is the heaviest parcel UPS and FedEx accept? +
150 lb, 108 in on the longest side and 165 in in length plus girth. Past any of these the shipment moves as LTL freight.
What is the USPS Ground Advantage weight limit? +
70 lb, with a length plus girth of up to 130 in. A heavier carton has to go by UPS or FedEx.