EV Charging Cost Calculator

How to use this calculator

Enter Miles driven, kWh per 100 miles, Price per kWh ($), Charging losses (%). The result updates in your browser as you edit an input. The prefilled values are examples only.

How the estimate works

Cost = (miles ÷ 100) × (kWh per 100 miles) × (1 + allowance ÷ 100) × price per kWh. The percentage is added to baseline energy. It is not a charger-efficiency percentage: a measured 10% loss of incoming electricity would require a different calculation. If your consumption value already includes charging losses, enter zero to avoid adding them twice.

What can change the answer?

Charging losses and household electricity rates vary. Public charging, demand charges, and time-of-use pricing may make actual spending different.

Before relying on the result

Use miles with miles per U.S. gallon, or kWh per 100 miles as labeled. Match the distance period and check prices against your fuel receipt, electricity tariff or charging bill. The result includes only the cost categories and assumptions described on this page.

Further reference

For source data or a more detailed method, see U.S. Department of Energy: vehicle cost comparison. The calculator does not automatically import data from this source.

Worked example with the default inputs

At 12,000 miles and 30 kWh per 100 miles, baseline energy is 3,600 kWh. The tool adds a 10% allowance to give 3,960 kWh; at $0.17 per kWh, cost is $673.20.

Interpret the result in a planning record

The EV charging calculator uses miles, kWh per 100 miles, price per kWh and an added charging-loss percentage. Use an efficiency figure with the same basis as the model; adding losses to a number that already includes them can count them twice. Home and public charging rates may need separate scenarios rather than one blended guess.

Save the input values, units and result together. Change one uncertain input at a time so you can see which assumption moves the answer. A displayed decimal is arithmetic precision, rather than evidence that the measurements or rates are equally precise.

More tools

Read the How to Compare Gas and EV Energy Costs Fairly guide →