Calculate proper trailer weight distribution and tongue weight. Ensure safe loading with the 60/40 front-to-rear ratio guideline.
Proper trailer weight distribution is critical for safe towing. An improperly loaded trailer can cause dangerous sway, loss of control, and jackknifing. The general rule is that 60% of cargo weight should be in the front half of the trailer and 40% in the rear, with 10–15% of total trailer weight on the tongue.
This calculator helps you plan cargo placement by showing ideal weight distribution zones for your trailer. Enter your trailer's empty weight, cargo weight, and the calculator shows how much weight should be placed in each zone.
Trailer sway is the leading cause of towing accidents. Most sway is caused by too much weight behind the trailer's axle(s). Placing heavy items low and forward, over or slightly ahead of the axles, dramatically improves towing stability.
Whether you drive a compact sedan, a full-size SUV, or a pickup truck, accurate trailer weight distribution figures help you plan smarter and avoid costly surprises at the pump or dealership. Use this tool regularly to track changes over time and adjust your transportation budget accordingly.
Trailer sway causes thousands of accidents annually. Proper weight distribution is the simplest and most effective prevention. This calculator gives you specific weight targets for each trailer zone so you can load safely and confidently. Results update instantly as you adjust inputs, making it easy to explore different scenarios and find the best option for your driving needs and budget.
Total Loaded Weight = Empty Trailer + Cargo | Target Tongue Weight = 10–15% of Total | Front Cargo = 60% of Cargo Weight | Rear Cargo = 40% of Cargo Weight
Result: Tongue weight: 500–750 lbs, Front cargo: 1,800 lbs, Rear cargo: 1,200 lbs
Total loaded weight: 5,000 lbs. Target tongue weight: 500–750 lbs (10–15%). Front zone cargo: 60% × 3,000 = 1,800 lbs. Rear zone cargo: 40% × 3,000 = 1,200 lbs.
Trailer weight distribution directly affects towing stability. A front-heavy load (within limits) creates positive tongue weight that keeps the trailer tracking straight. A rear-heavy load creates sway that worsens with speed.
60% of cargo weight should be in the front half of the trailer, 40% in the rear. This naturally creates the 10–15% tongue weight that ensures stable towing. Place the heaviest items low and centered, directly over or ahead of the axle(s).
Packing heavy items in the rear for easy access is the most common — and most dangerous — loading mistake. Other errors: loading one side heavier than the other, not securing cargo, and exceeding the trailer's GVWR.
For trailers over 3,500 lbs, a weight distribution hitch is strongly recommended (and often required by trailer manufacturers). These hitches redistribute tongue weight across all axles, leveling the vehicle and dramatically reducing sway.
Primary causes: too little tongue weight (under 10% of trailer weight), high speeds, crosswinds, passing large vehicles, and uneven loading. The most controllable factor is loading — more weight forward prevents sway. Speed amplifies all sway causes.
For conventional bumper-pull trailers, tongue weight should be 10–15% of total loaded trailer weight. For fifth-wheel/gooseneck trailers, it should be 15–25%. Too little causes sway; too much overloads the rear axle.
A weight distribution hitch uses spring bars to transfer some of the tongue weight from the rear axle to the front axle and trailer axles. This levels the tow vehicle, improves steering, and reduces sway. Required for most travel trailers over 3,500 lbs.
Use a tongue weight scale (available for $30–80) under the trailer coupler. For more precision, park the tow vehicle on a truck scale with and without the trailer attached — the difference is tongue weight. Many truck stops have scales for $10–15.
Never brake hard or steer sharply if the trailer sways. Instead: let off the gas, do not brake (or brake very gradually), hold the steering wheel straight, and allow the vehicle to slow naturally. Once under control, pull over and redistribute your load.
Yes, for trailers over 3,000 lbs. Friction sway controls ($50–$200) resist yaw movement. Dual-cam sway control systems ($200–$400) are more effective. Many weight distribution hitches include integrated sway control. These supplement proper loading, not replace it.