Battery | Range | Uphill | Charging Time
E-Bike Range Calculator
Calculate an estimation for the range of an e-bike. The range can't be calculated exactly, it depends on many different and uncertain factors. Some of these are the desired grade of assistance from the electric motor, the distance profile and the weight of cyclist and bike. The consumption for one kilometer is generally between 4 and 10 watt-hours on moderate terrain and 10 to 15 watt-hours on hilly terrain.
Please enter two values, the third value will be calculated. The range can be entered in meters (m), kilometers (km) or miles (mi).
Example: an e-bike with a 400 watt hours battery, at a consumption of 7 kilometers per watt hour, can go up to 57 kilometers.
For the lifespan of the battery, it is advisable not to charge it fully too often and not to ride it completely empty. Sometimes, when you want to cover as long distances as possible, this happens, but it should not become the norm. It is best to charge the battery to a maximum of 80 percent and ride it to no less than 20 percent empty. So you can plan with about 60 percent of the available energy. With a battery size of 500 watt hours, this is 500 Wh * 0.6, or 300 watt hours.
How much energy you actually need on average for one kilometer of course depends very much on the terrain. Uphill consumption is significantly higher than on flat terrain. Downhill, energy is no longer used at all above a certain gradient. Some e-bike models even have recuperation, i.e. they charge the battery when braking and rolling downhill. This is technically only possible with models with a hub motor on the rear wheel, in which case the bike does not have a coaster brake. This is the situation in the 20s of the 21st century, further technical developments are to be expected in the future.
Last updated on 06/29/2025. Author: Jürgen Kummer
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