All towing calculators

14 tools. Each shows its formula, a worked example, and the standard or regulation behind it.

• Tongue Weight Calculator Find your target tongue weight and check a measured value against the safe range.
• Towing Capacity Calculator Work out what you can actually tow once passengers, cargo and tongue weight are counted.
• Trailer Axle Weight Calculator Split trailer weight across axles and check each one against its rating.
• Trailer Axle Placement Calculator Where to put the axle so the tongue carries 10-15% of the load. Derives the 60% rule instead of quoting it.
• Trailer Axle Weight Chart Common axle capacities, what a bare axle weighs, and how to identify the axle you have.
• Weight Distribution Hitch Calculator See how much load a WD hitch moves back to the front axle, and whether you need one.
• Payload Capacity Calculator What is left of your truck payload after people, gear and the trailer tongue.
• GVWR Margin Calculator How close a loaded trailer is to its GVWR, and how much cargo is left.
• Trailer Payload Calculator How much cargo a trailer can legally carry, from GVWR and empty weight.
• Trailer Tire Load Range Chart Load range B to F, ply equivalence and max pressure — plus what load range your trailer actually needs.
• Trailer Ball Size Chart Ball diameters, shank sizes and capacities, and how to match one to your coupler.
• Fifth Wheel Pin Weight Calculator Target pin weight for a fifth wheel or gooseneck, and what it costs you in truck payload.
• Truck Camper Weight Calculator Whether a camper fits your truck once water, propane, batteries and gear are aboard.
• Hitch Class Selector Which receiver class covers your trailer weight and tongue weight.