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E-bike range calculator
How far will your e-bike actually go? Enter battery, motor, weight, terrain, and assist level — get a realistic range band based on 14 Wh/mi industry baseline, not the manufacturer's optimistic marketing claim.
Multiply voltage × amp-hours (e.g. 36V × 13Ah = 468 Wh)
The continuous-rated wattage on the spec sheet, not peak
Combined weight on the bike. Heavier rider → more Wh/mile.
How hilly is your typical ride?
The PAS level you typically ride in
Bikes in our catalog matching your range
Real e-bikes whose claimed range falls inside your 28.9–39.1 mi band.
No bikes in our catalog match this exact range band. Adjust the inputs or browse all reviewed e-bikes.
How the math works
We start from a baseline of 14 Wh per mile — what a 175 lb rider typically burns on a 750 W e-bike on flat ground at moderate pedal-assist (well documented across owner forums and Bosch / Shimano educational content). Then we layer realistic modifiers:
- Weight: ±0.05 Wh/mi per 10 lb away from 175 lb baseline
- Terrain: flat 1.00× · hilly 1.40× · mountain 1.85×
- Assist: eco 0.65× · normal 1.00× · sport 1.30× · max 1.65×
- Throttle-only: +40% consumption (no pedalling means motor does all the work)
- Motor size: +5% Wh/mi per 250 W of rated power above 500 W
We return a ±15% band rather than a single optimistic number — real-world rides vary with wind, temperature, tire pressure, and how aggressively you twist the throttle.
Range calculator — FAQ
How accurate is this e-bike range calculator?
It returns a realistic ±15% band based on industry-standard consumption rates (~14 Wh per mile for a 175 lb rider on flat terrain at moderate pedal-assist). Real range varies with wind, temperature, tire pressure, and how aggressively you twist the throttle — so we show a band rather than a single optimistic number. Owner reports on r/ebikes consistently fall inside our band.
How far does a 500 Wh e-bike battery go?
A 500 Wh battery on a 175 lb rider, flat terrain, moderate pedal-assist, no throttle, gives roughly **30–41 miles** (mid-point ~36 mi). Hilly terrain drops that to 22–29 mi. Throttle-only riding adds another ~40% consumption.
Do bigger motors drain the battery faster?
Slightly, yes. Above a 500 W rated motor, every additional 250 W of rated power increases Wh-per-mile by ~5%. The trade-off: the bigger motor finishes a hill faster (less time at high draw), so the net penalty on flat ground is small. On steep hills a bigger motor often consumes LESS total energy because it spends less time fighting gravity.
Why is the manufacturer range claim always optimistic?
Manufacturer ranges are measured at the lowest assist level on flat terrain with a light rider, often without lights or accessories on. That setup is the best-case theoretical maximum. Real range is typically 60–75% of the marketing claim — which is exactly the band this calculator surfaces.
Does cold weather affect e-bike range?
Yes — significantly. Below 5°C / 40°F, lithium battery capacity can drop 20–35% until the cell warms up. The calculator doesn't model temperature directly, so subtract ~25% from the result for sub-freezing winter rides. Insulated battery covers help a lot.
Can I use the calculator for any e-bike brand?
Yes — the math depends on physics (battery Wh, rider weight, terrain), not on brand. Whether you ride a Heybike, Eleglide, Lectric, Aventon, Specialized, or Trek, the same battery + rider + terrain produces the same realistic range.