Calculate EV driving distance, energy required or efficiency, including usable battery capacity and a state-of-charge window. Energy and efficiency must use the same battery or wall measurement boundary.
kWh to Miles Formula
The following formula is used to convert kWh to miles.
Variables:
- M is the miles that can be driven
- E is the energy in kilowatt-hours (kWh)
- Eff is the efficiency in miles per kWh
To calculate the miles that can be driven, multiply the energy in kWh by the efficiency in miles per kWh.
| Energy (kWh) | Distance (miles) |
|---|---|
| 1 | 3.5 |
| 2 | 7.0 |
| 3 | 10.5 |
| 4 | 14.0 |
| 5 | 17.5 |
| 7.5 | 26.3 |
| 10 | 35.0 |
| 12 | 42.0 |
| 15 | 52.5 |
| 20 | 70.0 |
| 25 | 87.5 |
| 30 | 105.0 |
| 35 | 122.5 |
| 40 | 140.0 |
| 50 | 175.0 |
| 60 | 210.0 |
| 70 | 245.0 |
| 75 | 262.5 |
| 90 | 315.0 |
| 100 | 350.0 |
| * Rounded to 1 decimal. Assumes constant EV efficiency: 3.5 mi/kWh. Formula: miles = kWh × efficiency. | |
What is Efficiency in Electric Vehicles?
Distance per energy (such as mi/kWh) describes travel economy, not thermodynamic conversion efficiency. Use battery energy with battery-side economy, or wall energy with wall-side economy. Battery capacity mode uses usable capacity and battery-side economy. Range depends on speed, weather, terrain, HVAC, payload and battery condition; no charging-loss conversion or guaranteed range is inferred.
How to Calculate Miles from kWh?
The following steps outline how to calculate the miles that can be driven from kWh.
- First, determine the efficiency of the electric vehicle (Eff) in miles per kWh.
- Next, determine the energy available (E) in kilowatt-hours (kWh).
- Use the formula from above = M = E * Eff.
- Finally, calculate the miles (M) that can be driven.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Efficiency of the electric vehicle (Eff) = 4 miles per kWh
Energy available (E) = 24 kWh on the same energy basis as 4 mi/kWh. Estimated distance = 24 × 4 = 96 miles.
