Auto

Auto Loan Calculator

Price a vehicle loan: subtract down payment and trade-in from the car price to get the amount financed, then see monthly…

Boat Fuel Burn Calculator

Enter engine horsepower, fuel type, and load to estimate burn rate. Add hours underway, pump price, and tank size to see…

Braking Distance Calculator

Enter speed, reaction time, and braking deceleration. Get reaction distance, braking distance, and total stopping distan…

EV Charging Cost Calculator

Enter the energy you add and your electricity rates to compare what the same charge costs at home and at a public charge…

Fuel Economy Calculator

Enter the distance you drove, the fuel you used and the price. You get consumption in L/100 km or MPG, and what the trip…

Gear Ratio Calculator

Find a gear ratio from tooth counts, multiply it by the final drive for the overall ratio, or compare two gears to see t…

Horsepower ↔ kW ↔ PS Converter

Convert between mechanical horsepower (hp), kilowatts (kW) and metric horsepower (PS, CV, ch). Match US, European and SI…

Power-to-Weight Calculator

Enter peak power and vehicle weight to compare cars in hp per tonne, kW per kilogram and hp per pound. Useful for perfor…

Quarter Mile Calculator

Enter horsepower and vehicle weight, driver included. Get a ballpark quarter-mile time and trap speed from classic power…

RPM ↔ Speed Calculator

Enter the transmission gear ratio, final drive and tire diameter. Convert RPM to speed or speed to RPM to estimate cruis…

Tire Size Calculator

Enter your stock and new tire sizes (width / aspect / rim). See how the overall diameter changes and how far your speedo…

Trip Fuel Cost Calculator

Enter trip distance, your car’s fuel economy, and the price at the pump. See how much fuel you need and what the trip wi…