Light

Guide

Calculate E-Bike Distance per Charge

Calculate e-bike distance per charge from battery Wh, assist level, rider weight, and route conditions. See how many km you get on one full charge before your next ride.

Open the calculator →

Distance per charge is the question every rider asks after the first week—how far can I go on one fill? This guide shows how to calculate km per charge from usable energy and the Wh/km your assist and terrain demand.

Benefits

  • Outputs km per full charge from pack Wh and real-world consumption inputs.
  • Adjust assist, mass, and wind/terrain to match outbound vs. return legs.
  • Useful for commute go/no-go decisions and charger stop planning on longer rides.

How it works

  1. Start from a full charge: enter battery Wh and realistic pack efficiency.
  2. Set Wh/km drivers—base consumption, assist level, total mass, wind/terrain factor.
  3. Read estimated km per charge; rerun with higher assist or headwind for conservative planning.

FAQ

How do I calculate e-bike distance per charge?

Km per charge ≈ (battery Wh × efficiency) ÷ Wh/km. Example: 504 Wh at 91% efficiency with 10.5 Wh/km → about 44 km on one charge. Lower assist or tailwind factors increase km per charge.

How far can an e-bike go on one charge?

Typical commuter setups land between 30–70 km per charge depending on pack size, assist, and hills. A 400 Wh pack at moderate assist on flat terrain may deliver ~35 km; a 750 Wh pack on eco assist can exceed 60 km—your inputs matter more than averages.

Should I plan rides at max assist range?

No—use the assist level you will actually ride. Max assist can halve km per charge versus Level 1–2. Plan with worst-case wind or climb on the return leg so you are not stranded below your BMS cutoff.

Technical specifications

  • Km per charge = usable_Wh ÷ Wh/km.
  • Usable Wh = battery_Wh × pack_efficiency.
  • Wh/km from base × assist × wind/terrain + weight penalty.
  • Related: ebike-charge-time, ebike-commute-savings, ebike-max-speed.

One charge, one number

Retailers quote optimistic km per charge; your loop may include stops, grades, and headwinds that the brochure test never saw. Calculating distance per charge with your mass and assist level produces a rider-specific km figure you can compare to GPS logs after a few weeks.

Partial charges and mid-ride math

This tool assumes a full charge start. For mid-day top-ups, scale usable Wh by state of charge or rerun with remaining Wh from your display. Distance per charge is still the same Wh/km model—only the energy numerator changes.