Trailer Weight Calculator 🚛
Calculate total trailer weight, tongue weight, and check if your tow vehicle can safely tow your boat. Includes safety margin check.
How to Use the Trailer Weight Calculator
Enter boat dry weight, trailer weight, and gear/fuel weight to calculate total weight and tongue weight.
Tongue weight is approximately 12% of total weight. Never exceed your tow vehicle's maximum towing capacity.
Always check tire pressure, lights, and brakes before towing. Safety first.
FAQ
How do I calculate total trailer weight?
Total trailer weight = Boat dry weight + Trailer weight + Gear/fuel weight. Tongue weight should be 10-15% of total trailer weight. For example: 3,000 lb boat + 800 lb trailer + 200 lb gear = 4,000 lb total. Tongue weight = 400-600 lbs.
What is tongue weight and why does it matter?
Tongue weight is the downward force the trailer hitch exerts on the tow vehicle. Too little tongue weight (under 10%) causes trailer sway. Too much (over 15%) overloads the rear axle and reduces front wheel traction. Proper tongue weight is critical for safe towing.
How do I know if my vehicle can tow my boat?
Check your vehicle's tow rating in the owner's manual. Never exceed this rating. Also check the Gross Combined Weight Rating (GCWR) — the maximum weight of vehicle + trailer + cargo. Ensure your hitch, ball, and wiring are rated for the load.
What safety checks should I do before towing?
Before every tow: check tire pressure on trailer and tow vehicle, verify all lights work (brake, turn, running), ensure safety chains are crossed and connected, check that the boat is properly secured with straps, verify the winch strap is attached, and confirm the drain plug is in.
How do I prevent trailer sway?
Trailer sway is caused by improper tongue weight, speed, crosswinds, or passing trucks. Prevention: ensure proper tongue weight (10-15%), use a weight distribution hitch for heavy loads, install a sway control device, maintain proper tire pressure, and never exceed 55 mph when towing.