E-Bike Motor Power Estimator

Calculate the required motor power based on total weight, slope, and speed — including force breakdown (torque, rolling, air).

Speed Units
Note: These are informative estimations. Always include an additional safety margin when choosing your motor.
Quick Tips
  • Typical Crr for road tires: 0.003–0.02. Narrow tires usually mean lower Crr.
  • CdA depends on rider posture — a tucked position reduces CdA.
  • For long climbs, choose a motor stronger than the calculated recommendation.