E-bike battery calculator: how many Wh do you need for your rides?
Across the 68 listings in our data, e-bikes claim a median of 8.6 miles per 100 Wh of battery. For a claimed range of 40 miles, you need about 460 Wh. These are manufacturer figures, measured in favorable conditions: on the road, real range is often lower.
Enter the distance you want to ride on one charge and your type of bike. The calculator works out the battery capacity manufacturers pair with that distance, then lists the models in our selection that reach it.
Recommended battery: 460 Wh (380 to 500 Wh depending on the listing)
48 models in our selection have at least this capacity.
- NARRAK N3 Folding Electric Trike468 Wh battery · 40 miles claimed
- Heybike Cityscape 2.0468 Wh battery · 50 miles claimed
- NARRAK N3468 Wh battery · 40 miles claimed
- 14-inch Folding E-Bike, 48V 10Ah (unbranded)480 Wh battery · 20 miles claimed
- 14-inch Foldable E-Bike, 48V 10Ah (unbranded)480 Wh battery · 35 miles claimed
- ANCHEER 26" Step-Thru E-Bike (499 Wh)499 Wh battery · 55 miles claimed
Claimed range by type of e-bike
Medians calculated from 68 e-bike listings on Amazon.com (US), updated October 12, 2026.
| Type | Models | Median battery | Median claimed range | Claimed miles per 100 Wh |
|---|---|---|---|---|
| Commuter / city | 11 | 499 Wh | 55 miles | 8.6 miles |
| Folding | 7 | 374 Wh | 35 miles | 8 miles |
| Electric mountain bike | 6 | 748 Wh | 70 miles | 9.7 miles |
| Fat tire | 6 | 720 Wh | 65 miles | 8.6 miles |
| All types | 68 | 624 Wh | 60 miles | 8.6 miles |
Listings without a battery capacity or a stated range are not counted (7 listings left out).
How the calculation works
- For each listing, we divide the battery capacity (in Wh) by the maximum claimed range. That gives the manufacturer's energy use in Wh per mile.
- The calculator multiplies your distance by that energy use. The median value gives the recommended battery; the most efficient quarter and the least efficient quarter of listings give the range.
- Claimed range usually means the lowest assist level, on flat ground, in good conditions. With hills, a heavier load, cold weather or full assist, it drops a lot: leave yourself some margin.
- Capacity in Wh is voltage (V) × amp-hours (Ah). A 36 V, 13 Ah battery holds 468 Wh; a 48 V, 15 Ah battery holds 720 Wh.
- We don't ride these bikes: every value comes from the listings published by sellers.
FAQ
What is the real-world range of an e-bike?
The listings in our data claim a median of 60 miles per charge. That figure is measured with the lowest assist level and in good conditions. In stop-and-go city riding, on hills or with high assist, expect a lot less.
How many Wh for 40 miles?
Based on the listings, about 460 Wh (380 to 500 Wh depending on the model). To actually ride 40 miles with high assist or on hills, aim higher.
How do you calculate a battery's Wh?
Multiply the voltage by the amp-hour rating: 36 V × 13 Ah = 468 Wh, 48 V × 15 Ah = 720 Wh. Some listings only give the Ah: without the voltage, you can't compare.
Why does a fat tire e-bike get less range from the same battery?
According to the listings, a fat tire e-bike claims 8.6 miles per 100 Wh, versus 8.6 miles for a commuter bike. Its wide tires and extra weight take more energy.
See also
- Best Electric Bike in 2026: 6 E-Bikes Compared by Use
- Best Cargo Electric Bike: 6 Haulers Compared
- Best Cheap Electric Bike: 6 Budget E-Bikes Compared
- Best Commuter Electric Bike: 6 Models Compared
- Best Electric Beach Cruiser: 6 Relaxed Rides Compared
- Best Electric Bike for Heavy Riders: Load Ratings Checked
- Best Electric Bike for Seniors: 6 Stable Trikes Compared
- Best Electric Bike for Teens: 6 Models Compared by Speed and Size