Towing calculators
Each one does simple arithmetic on your own numbers and shows it beside the rating the manufacturer published. None of them works out a rating.
Towing calculator
Pick your vehicle and build, enter what your trailer weighs, and see it beside the published rating and your payload.
Towing capacity by VIN
Enter a VIN to decode the year, model, engine and drive, then see the published ratings that fit.
Tongue weight calculator
Enter your trailer's loaded weight to see the weight on the hitch and the payload it leaves.
Trailer weight calculator
Add water, propane and gear to the empty weight to get the loaded weight a towing rating is measured against.
Why no calculator here gives you a rating
A towing rating comes out of the manufacturer's own testing of one build. It cannot be worked out from engine size or weight, so we copy it from the document it was printed in and say which page. How the ratings are collected.