EV charging cost calculator UK
Estimate electric car charging cost from battery size, start and target charge, efficiency and tariff. Enter your public, home or Northern Ireland charging rate.
Enter your figures
Estimated charging cost
Inputs changed. Select Calculate result to update your estimate.
Default 26.32p/kWh is Ofgem’s GB average home Direct Debit cap rate for October–December 2026. It is not a public charger or Northern Ireland rate; choose your own tariff for those. Capacity and charging efficiency are examples. Excludes parking and session fees.
How the ev charging cost calculator uk works
Battery energy = capacity × charge increase ÷ 100. Grid energy = battery energy ÷ efficiency. Cost = grid kWh × unit price.
UK data and rules
October–December 2026 data · Checked 16 October 2026. Rules are a dated snapshot, not a live feed.
Read about data coverage and updates
Worked example: electric car charging cost
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Usable battery capacity (kWh)
- 60
- Starting charge (%)
- 20
- Target charge (%)
- 80
- Charging efficiency (%)
- 90
- Tariff (pence per kWh)
- 26.32
- Electricity rate reference
- GB home electricity reference — Oct–Dec 2026
Estimated charging cost: £10.53
Battery energy = capacity × charge increase ÷ 100. Grid energy = battery energy ÷ efficiency. Cost = grid kWh × unit price.
Electric car charging cost: questions answered
Why is grid energy higher than energy added to the battery?
Charging is not perfectly efficient. The tool divides battery energy by the efficiency you enter, so the electricity bought from the charger includes the modelled charging losses.
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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