E-bike manufacturer range claims are based on flat roads, ideal temperature, and the lowest assist level — which is why a claimed 100 km often turns into 60. This estimator uses your battery's actual Wh capacity, terrain, temperature and assist level to give a range that matches the ride.
| Mode | Wh/km | Range (km) | Range (h) |
|---|
European and US regulations cap e-bike motor power at 250 W nominal, but the assist level — Eco, Tour, Sport, Turbo — determines how much the motor helps relative to your input. Most tests are run on flat ground at 20 km/h with a small rider, in mild temperatures. Real life includes hills, headwinds, stop-and-go traffic, and a heavier rider. The difference between Eco and Turbo can be 4× in energy consumption.
Yes — if your conditions match the test. Flat, 20 km/h, 20 °C, lowest assist level. Anything else, expect less.
Wh = V × Ah. 36 × 14 = 504 Wh.
Most consumer e-bikes don't have meaningful regen. Some have it on the motor, but the energy recovered is usually 5-10% of what was spent climbing the hill.
If you want maximum range, yes. If you want to enjoy the ride and arrive less sweaty, use higher modes — but plan to charge or carry a spare battery for long rides.
This calculator was built to answer a question most online versions skip or oversimplify. It runs entirely in your browser; no inputs are stored or transmitted. The math is grounded in standard cycling physics and physiology models, and is suitable for hobbyist and intermediate training use. It is not a substitute for a coach, sports scientist, or professional bike-fit service.
This tool does not collect personal data. All inputs and results stay in your browser. We do not set first-party analytics cookies. This site may display ads served by Google AdSense; Google, as a third-party vendor, uses cookies to serve ads based on a user's prior visits to this site or other sites. Google's use of advertising cookies enables it and its partners to serve ads based on the visit to this site and/or other sites on the Internet. You can opt out of personalized advertising by visiting Google Ads Settings (google.com/settings/ads). Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this site or other sites.
Children under 13 are not the intended audience.
This calculator is provided for general informational and educational purposes only. It is not medical, mechanical, or legal advice. Predicted values depend on inputs you supply and simplified physical models; real-world outcomes vary. Use at your own risk. Brand names are descriptive only and do not imply affiliation.