Fuel vs EV Running-Cost Calculator

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Distance unit

Distance per year

Currency symbol

Petrol / diesel

Fuel price per litre / gallon

Distance per litre / gallon

Electric

Electricity price per kWh

Distance per kWh

Fill in fuel and electricity prices and efficiencies, then press Compare.

From the book — Bonus chapter. Running cost per mile = energy price ÷ distance that energy buys. For petrol it’s price-per-litre ÷ distance-per-litre; for an EV it’s price-per-kWh ÷ distance-per-kWh. Multiply by your yearly mileage for the figure that actually hits your budget. (Fuel only — it ignores purchase price, insurance, servicing and tax.)

Use whatever fuel unit your price is quoted in, as long as the “distance per …” matches it. Everything stays in your browser.