What is the 10–15% tongue weight rule?

For conventional bumper-pull trailers, tongue weight should be 10–15% of the loaded trailer weight. Below 10% the trailer is prone to dangerous sway; above 15% it overloads the truck's rear axle and eats into payload.

Why does payload matter more than tow rating?

Brochure tow ratings are maximums for stripped-down configurations. Payload — the weight your truck itself can carry, found on the driver's door-jamb sticker — is almost always the limit towers hit first, because tongue weight, passengers, and cargo all count against it.

Should I tow at 100% of my truck's tow rating?

No. Staying at or under 80% of the max tow rating leaves reserve for hills, wind, and extra gear. Between 80–90% is workable but tight; above 90% is not recommended.

Can My Truck Tow This Trailer? Free Towing & Payload Calculator

Q: How do I know if my truck can tow my trailer?

Check three things: (1) the trailer's loaded weight must be under your truck's max tow rating, (2) the tongue weight plus passengers and cargo must fit inside your truck's payload rating (door-jamb sticker), and (3) tongue weight should be 10–15% of the trailer's weight.

Towing calculator

Make

Model

Engine / trim Ratings shown are manufacturer-published maximums. Your truck's real numbers are on its door-jamb sticker — adjust below.

Your truck's real numbers

Max tow rating (lbs) From your owner's manual. Pre-filled from the truck picker — adjust to your configuration.

Payload capacity (lbs) From the yellow sticker on your driver's door jamb — not the brochure. Why this matters.

Your trailer

Trailer weight, loaded (lbs) Use the loaded weight (GVWR or scaled weight), not the dry weight.

Tongue weight (lbs) Weigh it with a tongue scale, or estimate 12% below.

I don't know my tongue weight — estimate it at 12% of trailer weight

What's in the truck

Passengers + cargo in/on the truck (lbs) People, coolers, firewood, generator — everything riding in or on the truck counts against payload. Don't forget the weight-distribution hitch itself (~75–100 lbs).

How this calculator works

Three checks decide whether a truck/trailer combination is safe:

Tow rating: the loaded trailer must weigh less than the truck's maximum tow rating — and ideally no more than 80% of it, leaving reserve for hills, wind, and extra gear.
Tongue weight: for a conventional bumper-pull trailer, tongue weight should be 10–15% of the loaded trailer weight. Less than 10% invites dangerous trailer sway; more than 15% overloads the rear axle.
Payload: tongue weight plus every passenger and every pound of cargo in the truck must fit inside the truck's payload rating. This is the limit most people exceed first — here's why payload beats tow rating.

All figures here are estimates. Always confirm against your owner's manual and the tire-and-loading sticker on your driver's door jamb before towing.

Towing guides

Payload vs. towing capacityWhy the brochure tow number lies and payload is the real limit. The 10–15% tongue weight ruleWhat tongue weight is, how to measure it, and how to fix it. Read your door stickerWhere to find your truck's real ratings in 60 seconds.

Common questions

How do I know if my truck can tow my trailer?

Check three things: the trailer's loaded weight against the tow rating, tongue weight plus passengers and cargo against payload, and tongue weight at 10–15% of trailer weight. The calculator above runs all three.

What is the 80% towing rule?

It's a widely used safety margin: keep your loaded trailer at or under 80% of the truck's maximum tow rating. Maximum ratings assume ideal conditions — flat ground, no wind, a stripped-down truck. The 80% rule leaves reserve for the real world.

Can I increase my truck's towing capacity?

No — tow ratings and payload are set by the manufacturer based on the frame, axles, brakes, cooling, and suspension. Hitches, air bags, and tuners can improve the towing experience but do not legally or safely raise the rating.

Does a weight-distribution hitch increase payload?

No. It redistributes tongue weight between the truck's axles and the trailer's axles for better handling, but the tongue weight still counts in full against your payload rating — plus the hitch itself weighs 75–100 lbs.