EV cost per mile
Calculate an EV's electricity cost per mile from miles per kWh and your entered electricity price. This is a unit-rate estimate, not the cost of a particular trip or a yearly budget.
Result
Cost per mile
How to use this tool
- Enter your car's efficiency in miles per kWh (check your dashboard's trip computer for a real-world figure).
- Enter the electricity price per kWh you want to use, such as your home tariff or a weighted rate for mixed charging.
- Read the cost per mile.
Assumptions
- Real-world efficiency varies with driving style, weather, speed and terrain — use your car's actual trip-computer average rather than the official spec figure for an accurate result.
Technical details: what the fields mean
- Efficiency
efficiencyMiPerKwh - Miles travelled per kWh of energy used. This is the reciprocal of kWh per 100 miles; use your car's real-world trip-computer average rather than only its official figure.
- Electricity price
pricePerKwh - Your electricity price per kWh.
Methodology
Cost per mile (pence) = (price per kWh ÷ efficiency) × 100.
Worked example
4 mi/kWh efficiency, 30p/kWh
Inputs: Efficiency: 4 mi/kWh, Electricity price: £0.30/kWh
Result: 7.5p per mile
Practical guidance
- Motorway driving and cold weather typically reduce EV efficiency noticeably — check your winter vs. summer trip-computer average separately if you want a realistic year-round figure.
- Compare this to the diesel/petrol journey cost calculators using your annual mileage for a like-for-like running-cost comparison.
Common mistakes
- Using the manufacturer's official WLTP efficiency figure instead of your own real-world average, which is often lower.
- Entering kWh per 100 miles in the miles-per-kWh field; the measures are reciprocals, not interchangeable values.
FAQs
How much does it cost to drive an EV per mile?
At 4 miles/kWh and 30p/kWh, about 7.5p per mile. Use your own car's efficiency and tariff for an accurate figure.
Last reviewed: 2026-10-11
Real-world efficiency varies significantly with conditions — treat this as an estimate based on the efficiency you enter.
This tool provides an indicative estimate, based on the assumptions stated above.
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