Three calculators
Towing decisions come down to four or five numbers, and almost all of them are on labels you already have. These three tools do the arithmetic.
Every calculator here works only from figures you enter yourself. There is no VIN lookup, and the site holds no database of vehicle tow ratings or payload figures - we have no licensed source for that data, and publishing capacity numbers we cannot verify would be a safety risk rather than a convenience. Your door-jamb sticker and your owner’s manual are the authoritative sources, and these tools exist to help you use them.
Enter your loaded trailer weight and your measured tongue weight. Returns the percentage and tells you whether it sits inside the 10 to 15 percent band.
When: Use it after any trip to a scale, and any time you change how the trailer is loaded.
Start from the payload figure on your door placard, subtract passengers, cargo and the hitch hardware, and see what is left for tongue weight.
When: Use it before you buy a trailer, and before you assume a tow rating applies to you.
Compares your measured tongue weight against your receiver's weight-carrying rating and the front-end rise you measured, then gives a yes, no or probably.
When: Use it before spending several hundred dollars on hardware you may not need.
Do not have a measured tongue weight yet? The public-scale method is free and needs no tools at all.