Towdini: Tow Calculator

The right match isn't magic. It's math. Towdini tells you whether your truck can safely tow your travel trailer or fifth wheel, and what to change when it's close. Answer a few guided questions, and Towdini checks your setup against every manufacturer rating as you type. CHECKS EVERY LIMIT • Tow rating, including separate fifth-wheel ratings • Payload, GVWR, and GCWR • Hitch rating, with weight-distribution and fifth-wheel hitch ratings • Front and rear axle ratings • Tongue weight (10–15%) or pin weight (20–25%) share SHOWS YOU HOW TO MAKE IT WORK When a setup is tight, Towdini doesn't stop at "no." It tells you exactly how much to take out of the truck, how much less to pack in the trailer, whether emptying your tanks helps, and when a bigger hitch or a weight-distribution hitch is the fix. SHOP FOR YOUR NEXT TRAILER See the heaviest loaded trailer your truck can pull, with and without a 10% safety cushion, and which rating is holding you back. YOUR GARAGE Save your truck, save the trailers you own or are shopping for, and see at a glance which ones fit. BUILT FOR REAL-WORLD TOWING • Guided prompts tell you where to find each number, like the stickers in your door frame • Accounts for propane tanks and batteries on the tongue • Plan for a full trailer, or enter the gear and water you'll really carry • Light and dark mode PRIVATE BY DESIGN No account, no ads, no tracking. Everything you enter stays on your phone. Towdini gives estimates based on the numbers you enter. Always confirm your ratings with your manufacturer and weigh your loaded setup at a certified scale before you travel.