About the E-Bike Motor Power Estimator

The E-Bike Motor Power Estimator is a practical online tool designed to help riders determine how much motor power their electric bike needs based on real-world conditions. By entering your total weight (including rider and bike), the slope of the terrain, desired cruising speed, and drivetrain efficiency, you can instantly estimate the required wattage for smooth performance.

This calculator uses fundamental physics — accounting for gravity, rolling resistance, and incline forces — to provide a realistic estimate of the mechanical power your motor must deliver. It’s ideal for DIY builders, e-bike enthusiasts, or anyone comparing different motor setups before purchase.

Keep in mind that this estimator provides an approximation. Actual results may vary depending on wind resistance, tire type, road surface, and rider posture. Use it as a reference point when planning your next e-bike build or upgrade.