EV versus petrol energy cost calculator UK
Compare electricity and petrol costs over the same mileage. Check the formula, worked example and limits before using your own figures.
Enter your figures
EV energy cost minus petrol cost
Inputs changed. Select Calculate result to update your estimate.
Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. Use charger-based efficiency including losses; otherwise the EV result is understated. Dated prefilled prices are not live quotes. Excludes purchase price, insurance, depreciation and all other ownership costs.
How the ev versus petrol energy cost calculator uk works
Petrol cost = miles/MPG × 4.54609 × pump price. EV cost = miles ÷ charger-based miles/kWh × electricity price.
Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.
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Worked example: ev versus petrol energy cost
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Miles to compare
- 100
- Petrol economy (UK MPG)
- 45
- Petrol pence per litre
- 175.28
- EV miles per kWh from the charger
- 3.5
- Electricity pence per kWh
- 26.32
EV energy cost minus petrol cost: −£10.19
Petrol cost = miles/MPG × 4.54609 × pump price. EV cost = miles ÷ charger-based miles/kWh × electricity price.
EV versus petrol energy cost: questions answered
What does the ev versus petrol energy cost calculation include?
Petrol cost = miles/MPG × 4.54609 × pump price. EV cost = miles ÷ charger-based miles/kWh × electricity price. Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. Use charger-based efficiency including losses; otherwise the EV result is understated. Dated prefilled prices are not live quotes. Excludes purchase price, insurance, depreciation and all other ownership costs.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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