Towing Capacity Calculator

Can your truck or SUV really tow that boat, camper or travel trailer? The number in the brochure is only part of the answer. This free towing capacity calculator checks your setup against several ratings at once: towing capacity, payload, GVWR and GCWR. Then it gives you a simple green, yellow or red result.

Have your owner’s manual handy and open the driver’s door. The door-jamb stickers list your GVWR and payload, and the manual lists towing capacity and GCWR for your exact configuration.

How to Use the Calculator

1. Vehicle towing capacity: the maximum trailer weight your vehicle is rated to pull. It changes with engine, axle ratio, cab, bed and drivetrain, so use the figure for your exact build. Our guide on how to read truck towing specs walks through it.
2. GVWR: the most your vehicle can weigh fully loaded, including passengers, cargo and tongue weight. See What Is GVWR?
3. GCWR: the maximum combined weight of the loaded vehicle and loaded trailer. See What Is GCWR?
4. Payload: how much weight the vehicle can carry. This is often the first limit people hit, because tongue weight counts against payload.
5. Curb weight: the empty vehicle weight with standard fluids.
6. Trailer loaded weight: what the trailer weighs packed for the trip, not the “dry” weight in the brochure. How to weigh a trailer covers using a public scale.
7. Tongue weight %: for most conventional (bumper-pull) trailers, 10–15% of loaded trailer weight is the commonly cited range. More on the 10–15% tongue weight rule.
8. Passengers and cargo: everyone in the cab plus coolers, tools, firewood, the hitch itself and anything in the bed.

What the Results Mean

• % of towing capacity used: loaded trailer weight divided by rated towing capacity. Many experienced towers try to stay at or under about 80% of rated capacity. That leaves a margin for wind, hills, heat and emergency maneuvers. It’s a common rule of thumb, not a legal limit or a manufacturer spec.
• Tongue weight: the downward force the trailer puts on your hitch. Too little can contribute to sway, and too much overloads the rear axle and steering feel.
• Remaining payload: payload minus passengers, cargo and tongue weight. If this goes negative, you’re overloaded even if the trailer is “under” towing capacity.
• GCWR check: curb weight + passengers/cargo + trailer, compared to GCWR.

Green means you’re within every rating you entered and under about 80% of towing capacity. Yellow means you’re close to one or more limits, so double-check your numbers and consider lightening the load. Red means at least one rating is exceeded as entered. Don’t tow that setup until it’s fixed.

Why Towing Capacity Alone Is Misleading

A truck advertised to tow 10,000+ lbs may only have 1,400–1,800 lbs of payload depending on trim. Put a family of four and a weekend’s gear in the cab, add 12% tongue weight from a 7,000-lb camper, and payload can run out well before towing capacity does. That’s why this calculator checks several numbers instead of one. For a deeper comparison, read towing capacity vs payload capacity and towing capacity explained.

Your weakest link sets the real limit. That includes your hitch receiver class, ball mount, ball, safety chains and tires. Check trailer hitch classes explained and the trailer ball size guide.

Disclaimer

This calculator provides estimates for general education. It doesn’t replace your manufacturer’s ratings. Always confirm the numbers in your owner’s manual and on the door-jamb sticker, and weigh your actual loaded rig.

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FAQ

How do I find my vehicle’s towing capacity?

Check your owner’s manual or the manufacturer’s towing guide for your exact model year, engine, axle ratio and drivetrain. Your door-jamb sticker lists GVWR and payload.

Should I stay under 80% of my towing capacity?

Staying at or under about 80% is a common rule of thumb that leaves a safety margin. It’s guidance, not a legal or manufacturer requirement. Never exceed any rated limit.

What is a good tongue weight percentage?

For most conventional bumper-pull trailers, 10–15% of loaded trailer weight is the commonly cited range. Fifth-wheel and gooseneck trailers use a higher pin weight.

Does tongue weight count against payload?

Yes. Tongue (or pin) weight is carried by the tow vehicle, so it reduces the payload left for people and cargo.

Can I use the trailer’s dry weight?

Use a loaded weight instead. Dry weight leaves out water, propane, batteries and gear, which can add a lot of weight. A public scale gives the most accurate number.