Key takeaways
- Aim for tongue weight at about 12% of gross trailer weight — 600 lb on a 5,000 lb trailer.
- The safe window is 10% to 15% of GTW; on 5,000 lb that's 500–750 lb.
- Too low causes sway; too high overloads the rear axle and lightens steering.
- Tongue weight counts against your tow vehicle's payload — not just the trailer's axles.
What tongue weight is and why it matters
Tongue weight is the downward force the loaded trailer's coupler presses onto the hitch ball. It is the share of the trailer's weight carried by the tow vehicle instead of the trailer's own axles. Get it right and the trailer tracks straight; get it wrong and you risk sway, poor steering, or an overloaded rear axle. The accepted target is 10–15% of gross trailer weight, with about 12% as a good default.
Because the figure is a percentage of total weight, the right tongue weight grows as you load the trailer heavier — so re-check it any time the cargo changes.
Worked example: 5,000 lb trailer
Recommended tongue weight = 5,000 × 0.12 = 600 lb. The safe range is 5,000 × 0.10 to 5,000 × 0.15 = 500 to 750 lb. If your scale reads 500 lb of tongue weight, that's 500 ÷ 5,000 × 100 = 10.0% — just inside the range at the low end, so you'd want to nudge a little cargo forward.
Recommended tongue weight by trailer weight
| Gross trailer weight | Minimum (10%) | Maximum (15%) |
|---|---|---|
| 2,000 lb | 200 lb | 300 lb |
| 3,500 lb | 350 lb | 525 lb |
| 5,000 lb | 500 lb | 750 lb |
| 7,000 lb | 700 lb | 1,050 lb |
| 10,000 lb | 1,000 lb | 1,500 lb |
Loading and capacity checks
To stay in range, load roughly 60% of the cargo ahead of the trailer axle, then re-measure. Remember that tongue weight transfers to the tow vehicle, so confirm it fits within your truck's limits — check the figures with the towing capacity calculator and verify the combined rig against the GCWR calculator before you hit the road.
Frequently asked questions
What is trailer tongue weight?
It's the downward force the trailer coupler puts on the hitch ball — the part of the loaded trailer carried by the tow vehicle rather than the trailer's axles.
Why should it be 10–15% of trailer weight?
That range gives enough downforce to resist sway without overloading the tow vehicle's rear axle. About 12% is a common target.
What if tongue weight is too low?
Under 10% lets the trailer fishtail and sway at speed because there isn't enough downforce on the hitch to keep it tracking straight.
What if tongue weight is too high?
Over 15% overloads the rear axle, lifts weight off the front steering tires, and can exceed the hitch rating — hurting steering and braking.
How do I measure tongue weight?
For a light trailer, rest the coupler on a bathroom scale at hitch-ball height. For heavier trailers, use a tongue-weight scale or a public vehicle scale.
Does it count against my payload?
Yes — tongue weight transfers to the tow vehicle and counts against its payload and rear axle rating along with passengers and cargo.
How do I adjust tongue weight?
Shift cargo forward of the trailer axle to raise tongue weight, or rearward to lower it — aim back into the 10–15% window, then re-check on a scale.
The 10–15% tongue-weight guideline is standard towing-safety advice across hitch and trailer manufacturers — see U-Haul / towing-safety guidance. The percentage figures here are exact arithmetic on the weight you enter.
Last reviewed June 2026