Grade Power Calculator

• Speed is the target speed in miles per hour.
• Weight is total vehicle weight including the rider(s) and cargo.
• Grade: 0 percent is flat ground and 100 percent is a 45 degree angle. The grade is automatically set to 0 unless another number is entered.

This calculator provides an estimate of how much power it will take to go on flat ground or up a grade at a certain speed. It does and can not estimate all variables such as lower than normal motor and drivetrain efficiency, higher than normal rolling resistance, and head or tail winds. This calculators mathematical formula is based on real world road testing of electric scooters and bikes. It calculates the user inputs with gravity, rolling resistance, and drag (air resistance) to obtain the Required Power result.

This calculator is designed for brushed motors. Calculations for brushless motors will be around 10% more efficient than the results that are shown.