Already know your box size and weight? Skip the guesswork: enter the dimensions and weight directly and compare live USPS, UPS, and FedEx prices for your exact route — one all-in price per service, labels sold online.
Length, width, height, weight, two ZIP codes. That's the whole form.
The packed box's length, width, and height in inches, its weight in pounds, and the origin and destination ZIP codes. No scale? Type what's inside instead — the calculator can estimate the packed size and weight from a plain description.
Carriers bill the greater of actual weight and dimensional weight (length × width × height ÷ a carrier divisor). A big light box often costs more than a small heavy one — entering real measurements is how you avoid both overpaying and post-delivery price corrections.
Route distance and zone, delivery speed, residential vs. commercial address, and the final packed size and weight. The same box can price very differently on different lanes — the calculator prices your actual route with live carrier rates.
For boxes under 5 lb, USPS Ground Advantage bought online at commercial rates is usually cheapest. Over one cubic foot or above ~15 lb, UPS and FedEx ground services often win. Online label prices run 20-40% below walk-up counter prices for the same service.
Measure the longest side as length, then width and height, all in inches, after the box is packed and closed. Round each up to the next inch and the weight up to the next pound — carriers round up, and underestimating triggers price corrections after delivery.
Length × width × height in inches divided by a carrier divisor (typically 139). If that number is bigger than the actual weight, the carrier bills the dimensional figure. Example: an 18 × 14 × 12 in box bills at 22 lb even if it weighs 6 lb.
Yes — describe what's inside ("winter jackets, about 10", "a toaster in its retail box") and the calculator estimates the packed size and weight, which you can adjust before buying the label.