Towing & Tiny House Calculators

Free, no-signup calculators for towing, trailers, RVs and tiny houses. Each tool shows its formula, a worked example and the sources it is based on, so you can check the math yourself.

Towing & trailer calculators

• Tongue Weight CalculatorFind the right tongue weight range for your trailer and check a measured value.
• Towing Capacity CalculatorHow much trailer can you really tow? Checks rated capacity, GCWR, payload and hitch rating.
• Truck Payload CalculatorSee how much payload is left after passengers, cargo, accessories and tongue weight.
• Travel Trailer & RV Weight CalculatorEstimate your loaded travel trailer weight from dry weight, water, cargo and options.
• Hitch Drop / Rise CalculatorFind the ball mount drop or rise you need to tow your trailer level.

More calculators are on the way: weight distribution, hitch class, trailer tires, tiny house weight, shipping container homes and off-grid solar.

All calculators give estimates for planning only. Always follow the ratings and instructions from your vehicle, trailer and hitch manufacturers.