E-bike range calculator
Estimate e-bike range from the battery rating and your energy use, or from a ride you have already measured. Add a planned ride to see the charge left at the end.
Battery 50 to 5,000 Wh, entered directly or as 12 to 120 V times 1 to 100 Ah; usable share 10 to 100%; starting charge 1 to 100%; reserve 0 to 99% and below the starting charge; energy use 1 to 100 Wh/km, including from a measured ride of up to 1,000 km; conditions -50 to 200%; trips up to 10,000 km. Calculated on your device; download a JSON report and a CSV of results. Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.
Your result
How to use E-bike range calculator
- Enter the battery rating in watt-hours, or as volts and amp-hours, and the usable share.
- Enter the starting charge and the reserve you want to keep.
- Enter your energy use per distance, or the distance and battery percentage of a ride you measured.
- Add extra consumption for hills, wind or assist level and a planned ride, then review and download the report.
Useful next steps
Battery energy
Battery energy in watt-hours is the nominal voltage times the amp-hour rating, because energy is charge times voltage (OpenStax College Physics 2e, section 19.1, July 2022, checked 16 October 2026). A 48 V, 17.5 Ah pack holds 840 Wh. The usable share covers battery age and the cut-off of the battery management system, and the battery display shows shares of that usable energy.
Energy use from a measured ride
If your display used 35% of an 840 Wh battery over 25 miles, the ride used 294 Wh, or about 7.31 Wh/km (11.76 Wh/mi). Measured rides already include your weight, tyres, terrain and assist level, so they are usually closer to your real use than a catalogue figure. Add extra consumption when the next ride is hillier, colder or into the wind.
Range and limits
Range is the energy between your starting charge and your reserve divided by energy use. With that ride, 10% extra consumption and 80% down to 20%, the estimate is about 39 miles. Batteries from 50 to 5,000 Wh and energy use from 1 to 100 Wh/km are accepted. Results are estimates, not a promise that a ride can be completed. Unit conversions use NIST SP 811 factors.