UK Energy Toolkit

Free calculator

EV charging cost

Estimate the electricity needed and cost to reach your target battery level.
All calculators

Use your vehicle’s usable battery capacity.

From 0 to 100.

From 0 to 100.

Accounts for charging losses. Enter your own estimate; 100% means no losses.

Use the pence per kWh on your bill or supplier account.

Estimated costs

Battery energy required
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Grid electricity required
—
Estimated charging cost
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Calculation explained

Battery energy = capacity × (target percentage − current percentage) ÷ 100.

Grid electricity = battery energy ÷ (efficiency percentage ÷ 100). Cost = grid electricity × unit rate ÷ 100.

Estimates assume your rate and usage stay unchanged. Use the rate you actually pay, including VAT where applicable. Figures are rounded for display only.