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E-Bike Range Calculator

Estimate your real-world e-bike range from battery size, assist level, rider weight, terrain, speed, tires and temperature.

Assist level
Terrain

New batteries are 100%. After 500 to 1,000 full cycles, most packs sit around 80%.

Estimated range

–mi

Likely between – and – mi in real-world riding.

–Wh per mile
–Riding time per charge
–Usable energy (Wh)
–Assist level

Estimate assumes ~90% usable capacity and typical pedal input. Wind and very steep climbs can change results by ±15% or more.

How the e-bike range calculator works

How far will my e-bike go on one charge? It typically lands within ±15% of real-world results for steady riding. Wind, very steep climbs, tire pressure and battery age can push actual range outside that band, so treat the result as a planning estimate.

  1. Range = usable battery energy ÷ energy used per distance.
  2. We assume about 90% of the rated watt-hours are usable, because the battery management system protects the top and bottom of the pack.
  3. Consumption starts from a baseline of roughly 6 to 14 Wh per km depending on assist level, then is adjusted for total weight (rider + bike + cargo), average speed (aerodynamic drag grows with the square of speed), terrain, tire type, stop-start riding and temperature (lithium-ion loses roughly 10 to 25% of its capacity near freezing).

Results are estimates to help you plan and compare. Always follow your manufacturer's specifications, especially for charging, tire pressure and load limits. Found a problem with this tool? Let us know.

Range questions, answered

How accurate is the range calculator?

It typically lands within ±15% of real-world results for steady riding. Wind, very steep climbs, tire pressure and battery age can push actual range outside that band, so treat the result as a planning estimate.

Why is my e-bike range lower in winter?

Cold lithium-ion cells deliver less of their stored energy and have higher internal resistance. Near 0 °C (32 °F) expect 15 to 25% less range. Store and charge the battery indoors, and fit it just before you ride.

How many watt-hours do I need?

Multiply your longest regular ride by about 15 Wh per mile (9 Wh per km) for mixed riding, then add 25% as a buffer. A 20-mile round trip suggests at least 375 Wh, so a 500 Wh battery gives comfortable headroom.

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