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E-bike Range Calculator.

Estimate range from nominal battery energy, usable and reserve fractions, and your measured energy consumption.

On-device calculationNo signup
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Set your values

Results update as you type.

Results update automatically as you type.

How to Use

Scenario arithmetic only: every lifecycle, waste, transport, or energy factor is entered explicitly; no regional defaults or hidden datasets are used.

Use Cases

Plan a commute or leisure ride

Determine how far you can ride on a single charge, accounting for a safety reserve, so you can plan routes and charging stops.

Example: If your battery is 500 Wh, usable fraction 0.9, reserve 0.1, and consumption 15 Wh/km, range is (500*0.9 - 500*0.1)/15 = 26.7 km.

Compare e-bike setups

Estimate the impact of different batteries, assist levels, or riding conditions on range to choose the best configuration.

Example: Compare a 400 Wh vs 600 Wh battery with the same consumption to see how much extra range you get.

Frequently Asked Questions

How does the E-bike Range Calculator work?
You input your battery's nominal capacity in watt-hours (Wh), the usable fraction (how much of the battery you can actually use), the reserve fraction (the portion you want to keep as a safety buffer), and your energy consumption in Wh/km. The calculator subtracts the reserve from the usable capacity and divides by consumption to estimate range.
What is the difference between usable and reserve fractions?
The usable fraction is the portion of the battery's nominal capacity that you can actually use without damaging it (often less than 100%). The reserve fraction is the portion you choose to keep as a safety margin, so you don't run out of power. The calculator uses the usable capacity minus the reserve to estimate range.
How can I find my e-bike's energy consumption?
Energy consumption (Wh/km) can be estimated from your riding habits, terrain, assist level, and weight. Many e-bike displays show this value, or you can calculate it by dividing the Wh used by the distance traveled on a typical ride.

Tips & Common Mistakes

Tips

  • Use a realistic usable fraction (often 0.8-0.9) to avoid overestimating range, as batteries shouldn't be fully drained.
  • Set a reserve fraction (e.g., 0.1-0.2) to ensure you have enough power for unexpected detours or hills.
  • Measure your energy consumption over several rides to get an average, as it varies with speed, terrain, and assist level.
  • Remember that cold weather and heavy loads increase consumption, so adjust your inputs accordingly.

Common Mistakes to Avoid

  • Using the nominal battery capacity as if it were fully usable, ignoring the usable fraction, which overestimates range.
  • Forgetting to subtract the reserve fraction, leading to a range that leaves you stranded.
  • Using an overly optimistic energy consumption value (e.g., from a flat, low-assist ride) for all conditions.

Last updated: August 13, 2026