Tongue weight
How much tongue weight should a trailer carry?
Tongue weight is the downward force the coupler puts on the ball when the trailer is loaded and hitched. It is not the trailer's total weight and it is not read off any brochure: it is measured at the coupler, with everything aboard the way it will actually travel.
The 10 to 15 percent band below is a widely taught towing convention, not a published standard. No regulator sets it. Every trailer maker, every hitch maker and every towing school teaches the same range because a trailer is a pendulum hinged at the ball, and where the weight sits along that pendulum determines whether it tracks straight or starts to hunt side to side.
Use the tongue weight calculator to work your own trailer's number, and the payload remaining calculator for the truck side of the sum, then come back to this chart to see where your figure lands against the conventional band.
On this page
What is tongue weight, exactly?
Tongue weight is the share of a loaded trailer's weight that presses straight down on the hitch ball rather than riding on the trailer's own axles. On a fifth wheel or gooseneck the equivalent figure is called pin weight, and it runs to a much higher percentage because the geometry is different. See the fifth wheel pin weight chart for that band.
How much tongue weight should a trailer carry at each weight?
The table below applies the conventional 10, 12 and 15 percent figures across the trailer weights this site's calculators and generated pages cover. Read the row for your own loaded trailer weight, or use the exact figure from a scale if you have one.
A 7,000 lb trailer should carry 700 to 1,050 lb of tongue weight, with 840 lb as a comfortable middle target.
Rule of thumb Widely taught towing convention rather than a published specification. It is a good starting point and it is not a rating.
| Trailer weight (loaded) | 10% (floor) | 12% (target) | 15% (ceiling) |
|---|---|---|---|
| 2,000 lb | 200 lb | 240 lb | 300 lb |
| 2,500 lb | 250 lb | 300 lb | 375 lb |
| 3,000 lb | 300 lb | 360 lb | 450 lb |
| 3,500 lb | 350 lb | 420 lb | 525 lb |
| 4,000 lb | 400 lb | 480 lb | 600 lb |
| 4,500 lb | 450 lb | 540 lb | 675 lb |
| 5,000 lb | 500 lb | 600 lb | 750 lb |
| 6,000 lb | 600 lb | 720 lb | 900 lb |
| 7,000 lb | 700 lb | 840 lb | 1,050 lb |
| 8,000 lb | 800 lb | 960 lb | 1,200 lb |
| 9,000 lb | 900 lb | 1,080 lb | 1,350 lb |
| 10,000 lb | 1,000 lb | 1,200 lb | 1,500 lb |
| 12,000 lb | 1,200 lb | 1,440 lb | 1,800 lb |
| 14,000 lb | 1,400 lb | 1,680 lb | 2,100 lb |
This is a starting point, not a clearance. The resulting tongue weight still has to fit inside your hitch rating, your receiver rating and your truck's payload.
What happens outside the 10 to 15 percent band?
Tongue weight under 10 percent is the condition most associated with trailer sway, which is why the convention says to err heavy, never light.
Rule of thumb Widely taught towing convention rather than a published specification. It is a good starting point and it is not a rating.
| Band | What it means | Why it matters |
|---|---|---|
| Under 10 percent | Below the conventional floor | This is the condition that produces sway. A tail-heavy load moves the trailer's center of mass back, which lengthens the pendulum hinged at the ball and removes the weight that would otherwise damp an oscillation. |
| 10 to 15 percent | Inside the conventional band | A starting point, not a clearance. It still has to fit inside your hitch rating, your receiver rating and your truck's remaining payload before it is actually safe to tow. |
| Above 15 percent | Above the conventional ceiling | Loads the tow vehicle's rear axle heavily and lightens the steer axle. A weight distribution hitch restores steer axle load here; it does not create capacity that was not already there. |
How does tongue weight drive weight distribution bar sizing?
Weight distribution spring bars are rated by tongue weight, and the published rating has to bracket the actual loaded tongue weight, including anything hung on the A-frame: propane cylinders, batteries, a generator, a bike rack. Bars sized far above the real tongue weight ride harshly and distribute poorly; bars sized below it bottom out and cannot do the job.
A trailer with a weighed 900 lb tongue weight calls for 1,000 lb bars, not the next size down and not the next size up.
Published standard A published, traceable figure: a standards body, a federal regulation or a manufacturer specification states it.
| Tongue weight range | Bar rating | Typical trailer GTW at that rating |
|---|---|---|
| 200 to 400 lb | 400 lb bars | 4,000 lb |
| 400 to 600 lb | 600 lb bars | 6,000 lb |
| 600 to 800 lb | 800 lb bars | 8,000 lb |
| 800 to 1,000 lb | 1,000 lb bars | 10,000 lb |
| 1,000 to 1,200 lb | 1,200 lb bars | 12,000 lb |
| 1,200 to 1,400 lb | 1,400 lb bars | 14,000 lb |
| 1,400 to 1,700 lb | 1,700 lb bars | 17,000 lb |
Bar ratings are published by every hitch maker. The "typical trailer GTW" column is a common pairing, not a rating: size bars to your weighed tongue weight, not to your trailer's brochure weight.
How do you measure actual tongue weight?
- Load the trailer the way it will actually travel. Fill fresh water, load the propane cylinders, pack cargo where it will actually ride. A dry, empty trailer will not give you a real number.
- Use a dedicated tongue weight scale. A scale built for the job, such as the Sherline LM 2000, reads tongue weight directly at the coupler with the trailer level and the tow vehicle in its normal towing stance.
- Or use a bathroom scale and a short pipe as a fulcrum. Set the scale a measured distance from a pivot point under the coupler, read the scale, then scale the reading up by the ratio of the two distances. Less precise than a dedicated scale, but far better than guessing.
- Compare the result to the band above. Divide the reading by the trailer's total loaded weight to get a percentage, then check it against the 10 to 15 percent band in the first table on this page.
Tongue weight at specific trailer weights
These generated pages carry the full arithmetic, the hitch class it points to and the weight distribution bar size for one exact trailer weight: tongue weight for a 7,000 lb trailer, tongue weight for a 10,000 lb trailer and tongue weight for a 5,000 lb trailer.
Frequently asked questions
What percentage should a trailer's tongue weight be?
The conventional band is 10 to 15 percent of the trailer's total loaded weight, with 12 percent commonly taught as a comfortable middle target. A 6,000 lb trailer should carry roughly 600 to 900 lb on the ball. This is a widely taught starting point rather than a published regulation, so treat it as a target to weigh against, not a guarantee.
What happens if tongue weight is too low?
Tongue weight under 10 percent is the condition most associated with trailer sway. A tail-heavy load shifts the trailer's center of mass backward, which lengthens the pendulum hinged at the hitch ball and removes the weight that would otherwise resist a side to side oscillation. Moving cargo forward of the trailer axle and re-weighing is the fix.
Can tongue weight be too high?
Yes. Tongue weight above 15 percent loads the tow vehicle's rear axle heavily and lightens the steer axle, which hurts steering feel and headlight aim. It is not the self-amplifying danger that low tongue weight is, but it can exceed your payload or your hitch rating quickly. A weight distribution hitch restores steer axle load here; it does not add capacity.
How do I find my trailer's actual tongue weight?
Load the trailer the way it will travel and weigh the coupler directly with a tongue weight scale, or use a bathroom scale and a pipe fulcrum scaled by the distance ratio. See our guide to measuring tongue weight at home for the full method with either tool.
Does a weight distribution hitch change how much tongue weight I need?
No. The 10 to 15 percent band still applies to how the trailer itself should be loaded. What a weight distribution hitch changes is where that tongue weight ends up once it reaches the tow vehicle: spread across the steer axle and the trailer axles instead of sitting entirely on the tow vehicle's rear axle.
Is the tongue weight percentage the same for a fifth wheel?
No. A fifth wheel or gooseneck uses a pin weight band of 15 to 25 percent, well above a conventional trailer's 10 to 15 percent, because the load sits over the truck's rear axle rather than hanging behind it. See the fifth wheel pin weight chart for that table.
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Researched, not professional advice. This page is compiled from published standards, manufacturer towing guides and product specifications, and owner-review consensus, not hands-on testing. Figures described as a rule of thumb are towing convention rather than published standards, and they are labelled that way wherever they appear. Nothing here overrides your own ratings. Work your payload sum before your tow rating, because payload is the limit that actually binds on most half ton trucks and nearly every SUV. Load a conventional trailer to 10 to 15 percent tongue weight and a fifth wheel to 15 to 25 percent pin weight, and never lighter: a tail heavy trailer is what starts sway. Weigh the rig loaded rather than trusting a brochure dry weight. A weight distribution hitch and a set of air bags both restore ride height and control, and neither one raises a single rating. Trailer brakes are required by state law above a threshold that varies by state, and a breakaway battery that has quietly gone flat is the normal condition of most trailers on the road.