E-Bike Range Calculator
Estimate how far your e-bike will go on one charge from battery size, assist level, terrain and weight.
About the E-Bike Range Calculator
Enter the battery capacity in watt-hours, the assist mode, the terrain, the rider's weight and the temperature. The calculator estimates the range in kilometres and miles.
An e-bike's range is battery energy (watt-hours) ÷ energy used per km. Typical mid-drive e-bikes use roughly 6–8 Wh/km in eco mode and 15–25 Wh/km in turbo, more on hills, with heavier loads and in headwinds. Lithium batteries also deliver less in the cold. Treat this as a ballpark; manufacturers' range assistants (e.g. Bosch's) work similarly.
The formula
Range = battery Wh × usable share ÷ Wh per km
Worked example
A 500 Wh battery in touring mode on rolling roads, 85 kg rider, 15 °C
- About 10 Wh per km
- 500 × 90% usable ÷ 10 = 45 km (28 miles)
Questions people ask
How do I find Wh?
Multiply battery volts by amp-hours (36 V × 14 Ah = 504 Wh).
Does pedalling harder help?
Yes, your effort reduces what the motor draws.