E-Bike Range Calculator

E-bike range comes down to a simple energy budget: how many watt-hours your battery holds, divided by how many watt-hours you burn per mile. This calculator first computes total battery energy as voltage times amp-hours (the standard Wh formula), then only counts 90% of that as usable, since manufacturers and battery chemists recommend not fully draining lithium-ion packs to preserve long-term capacity. Consumption per mile starts from a base figure set by your assist level — eco sips around 8 Wh/mile while turbo mode gulps roughly 35 — then gets scaled up by terrain (flat riding is the 1.0× baseline, rolling hills add 30%, hilly terrain nearly doubles it, and mountainous terrain multiplies consumption by 2.2×) and again by total system weight relative to a 235 lb baseline (170 lb rider plus 55 lb bike), so a heavier rider or bike proportionally increases energy use. Dividing usable battery energy by this fully-adjusted consumption rate gives estimated range in miles, converted to kilometers with the standard 1.60934 factor.

Ride time assumes a fixed average speed tied to your assist level (12-20 mph) rather than modeling acceleration, stops, or your specific terrain's effect on speed, so it's a rough estimate, not a route-specific prediction. Cost per charge uses a flat US average electricity rate of $0.14/kWh, which will be off if your local rate differs. Keep in mind real-world range also depends heavily on tire pressure, drafting, and how consistently you pedal versus relying on the motor — this model captures the big levers (assist, terrain, weight) but not every variable that affects a given ride.