GVWR stands for Gross Vehicle Weight Rating — the maximum allowable total weight of the vehicle (or trailer) including its own weight plus passengers, cargo, and fuel. It is set by the manufacturer and printed on a label inside the driver's door jamb.

What is the ideal tongue weight percentage?

Tongue weight should be 10–15% of the total loaded trailer weight. Too little (under 10%) causes trailer sway; too much (over 15%) puts excess strain on the hitch and rear axle. Some heavy trailers use a weight-distribution hitch to redistribute tongue weight across all axles.

What is available payload?

Available payload is the GVWR minus curb weight — it is the weight budget remaining for passengers, cargo, fuel, and accessories. Tongue weight counts against this budget because it physically presses down on the tow vehicle's hitch.

Can I tow a trailer whose GVWR equals my tow rating?

Technically yes, but only if the trailer is loaded exactly to its GVWR and you have no additional cargo or passengers in the vehicle. In practice, leave a safety margin and ensure the net vehicle weight (curb weight + passengers + cargo + tongue weight) does not exceed the vehicle's GVWR.

Where do I find my vehicle's tow rating?

Tow ratings are in the owner's manual, on the manufacturer's towing guide (often a separate booklet), or on the manufacturer's website. Note that the rating is specific to engine, transmission, axle ratio, and whether a tow package is installed — always use the correct figure for your exact configuration.

What is the difference between tow rating and payload?

Tow rating is the maximum weight your vehicle can pull behind it. Payload is the maximum weight you can load inside or on the vehicle. Both limits must be respected simultaneously — you can hit the payload limit before the tow rating limit when carrying heavy passengers plus a tongue-heavy trailer.

Trailer Weight Calculator

Name: Trailer Weight Calculator
Availability: InStock
Author: Nham Vu

Enter your vehicle and trailer specs to check tow rating limits, available payload, and tongue weight percentage instantly.

Vehicle Specs

Vehicle GVWR (lbs) — door jamb sticker

Vehicle Curb Weight (lbs) — empty weight

Tow Rating (lbs) — owner's manual

Passengers + Cargo Weight (lbs) — in the vehicle

Trailer Specs

Trailer GVWR (lbs) — max loaded trailer weight

Trailer Tongue Weight (lbs) — downward force on hitch

Enter your vehicle and trailer specs
then click Calculate.

Summary

Enter your vehicle and trailer specs to check tow rating limits, available payload, and tongue weight percentage instantly.

How it works

Enter your vehicle's Gross Vehicle Weight Rating (GVWR) from the door jamb sticker or owner's manual.
Enter the vehicle's curb weight (empty, no passengers or cargo).
Enter the manufacturer's tow rating for your specific vehicle and hitch configuration.
Enter the trailer's GVWR (maximum loaded weight) and its tongue weight.
Click Calculate to see payload capacity, net vehicle weight, and whether your setup is within safe limits.
Review the safety analysis — green means safe, red means a limit is exceeded.

Use cases

Verify a truck or SUV can legally and safely tow a travel trailer or fifth-wheel.
Check tongue weight percentage before loading a boat or utility trailer.
Calculate remaining payload after accounting for passengers and gear.
Compare multiple trailers against a single vehicle to find the best match.
Confirm tow setup compliance before a long road trip or cross-country move.
Help first-time trailer owners understand weight distribution basics.
Evaluate whether a weight-distribution hitch is required for a given setup.
Screen used trailers quickly by checking if specs fit your tow vehicle.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu