Check if your vehicle can safely tow your trailer. Calculate gross combined weight vs GCWR and see tongue weight recommendations.
Exceeding your vehicle's towing capacity is dangerous and illegal. Every vehicle has a Gross Combined Weight Rating (GCWR), which is the maximum combined weight of the vehicle, passengers, cargo, and trailer. Towing over capacity stresses the engine, transmission, brakes, and frame, leading to potential failure.
This calculator helps you determine if your tow setup is within safe limits. Enter your vehicle weight, passenger/cargo weight, trailer weight, and GCWR to see your safety margin. It also calculates tongue weight to ensure proper weight distribution.
Proper towing calculations prevent accidents, reduce mechanical breakdowns, and ensure your insurance remains valid. Many accidents involving trailers are caused by overloaded or improperly configured tow setups.
Whether you drive a compact sedan, a full-size SUV, or a pickup truck, accurate towing capacity 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.
Overloaded towing causes thousands of accidents annually. This calculator provides a quick safety check before you hitch up. It ensures your combined weight is within your vehicle's GCWR and your tongue weight is in the safe 10–15% range. 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.
GCW = Vehicle Curb Weight + Passengers/Cargo + Trailer Weight | Safety Margin = GCWR − GCW | Tongue Weight = 10–15% of Loaded Trailer Weight
Result: GCW: 11,500 lbs — 2,500 lbs under GCWR (safe)
GCW = 6,000 + 500 + 5,000 = 11,500 lbs. GCWR is 14,000 lbs. Safety margin: 2,500 lbs (17.9%). Tongue weight should be 500–750 lbs (10–15% of 5,000 lbs).
Vehicle manufacturers provide several towing-related ratings: GCWR, towing capacity, payload capacity, and gross vehicle weight rating (GVWR). Understanding all four is essential for safe towing. Never exceed any single rating.
Tongue weight is the most commonly miscalculated aspect of towing. Too light causes dangerous trailer sway at highway speeds. Too heavy overloads the rear suspension. Use a tongue weight scale at a truck stop for accurate measurement.
Manufacturer ratings assume ideal conditions: sea level, cool temperatures, flat terrain. In reality, altitude, heat, and hills all reduce effective towing capacity. Plan for 10–15% less than the rated maximum for safe real-world towing.
The most common mistakes: relying on bumper towing capacity instead of GCWR, forgetting to account for passenger and cargo weight, not weighing the loaded trailer, using the wrong hitch class, and ignoring tongue weight requirements.
Gross Combined Weight Rating (GCWR) is the maximum allowable weight of the tow vehicle plus trailer, including all passengers, cargo, fluids, and tongue weight. It's set by the vehicle manufacturer and accounts for engine, transmission, frame, and brake capabilities.
Overloading causes longer stopping distances, reduced steering control, transmission overheating, brake fade, suspension damage, and increased risk of blowouts. It may also void your warranty and insurance coverage, and can result in fines.
Tongue weight is the downward force the trailer exerts on the hitch ball. Too little tongue weight (under 10%) causes trailer sway. Too much (over 15%) overloads the rear axle and lightens the front, reducing steering control. The sweet spot is 10–15% of loaded trailer weight.
Check the driver's door sticker, owner's manual, or manufacturer's website. GCWR varies by engine, transmission, axle ratio, and packages. Make sure you reference the exact specifications for your vehicle's build configuration.
Yes. Payload is the maximum weight the vehicle itself can carry (passengers + cargo + tongue weight). Towing capacity is the maximum trailer weight. Both must be respected independently. Tongue weight counts against payload, not towing capacity.
The hitch must be rated for the trailer's gross weight. A Class III hitch handles up to 8,000 lbs, Class IV handles up to 12,000 lbs, and Class V handles up to 17,000+ lbs. Always use a hitch that matches or exceeds your trailer's gross weight.