EV Charging Cost Calculator

This EV charging cost calculator estimates electric car charging cost from distance, vehicle efficiency, electricity price, and charging loss.

Electric cars are usually compared using miles per kWh or kWh per 100 miles. The calculator supports both styles so you can use the figure shown by your vehicle, app, or manufacturer estimate.

Use it to estimate EV cost per mile, compare home and public charging rates, plan a trip, or see how a regular commute might affect your electricity bill.

The useful part is that the calculation separates driving energy from charger energy. Your car may use one amount of battery energy on the road, while the wall charger or public charger draws a little more from the supply because of charging losses.

That makes this page different from a general electricity cost calculator. It is focused on electric car charging cost, trip distance, vehicle efficiency, and the price you actually expect to pay per kWh.

If an EV travels 120 miles at 3.5 miles per kWh, the driving energy is about 34.3 kWh. With a 10% charging loss, the charger may draw about 37.7 kWh from the grid.

At £0.28 per kWh, that trip costs about £10.56. If the same charge happens at a public rate of £0.55 per kWh, the cost rises to about £20.74 even though the distance and vehicle efficiency are unchanged.

That is why the same electric car can feel cheap to run from a home charger and much more expensive on a rapid charger. The EV cost per mile is not a fixed number; it depends on where you charge, how efficiently the car is driven, and whether charging losses are included.

For regular journeys, try the calculation as a weekly or monthly total. A commute that looks small as one journey can become a meaningful part of the household electricity bill when repeated many times.

Home charging, workplace charging, rapid charging, and destination charging can have very different unit rates. Enter the rate you expect to pay rather than using a national average.

If you are comparing routes or charging options, keep the distance and efficiency the same, then change only the electricity rate. That makes the price difference easier to see.

For home charging, the right rate is usually the unit price from your tariff for the time you expect to charge. If you have a cheaper overnight rate, run one version with that price and another with your daytime price so the difference is visible.

For public charging, use the rate shown by the provider before you plug in. Some networks may also add connection fees, idle fees, parking charges, or membership pricing. This calculator handles the kWh price you enter, but those extra charges should be added separately if they apply.

The largest inputs are vehicle efficiency, electricity rate, and charging losses. Cold weather, motorway speeds, tyre pressure, cabin heating, roof boxes, and heavy loads can all reduce real-world range.

Charging loss matters because not every kWh drawn from the charger ends up as usable battery energy. A small loss percentage can still change the total on longer trips or high-rate public charging.

Miles per kWh is often the most intuitive figure for drivers because it behaves like MPG: higher is better. kWh per 100 miles works the other way round: lower is better because the car uses less energy to cover the same distance.

If your car shows recent efficiency from actual driving, use that instead of a brochure figure. Real-world driving data usually gives a better estimate of the cost to charge an electric car for your route, weather, speed, and driving style.

This calculator does not fetch live tariffs, charger prices, route elevation, battery temperature, or real-time traffic. It estimates cost from the values you enter.

For a full trip budget, add parking, tolls, congestion charges, battery preconditioning needs, and any idle or session fees charged by the public charging provider.

If you are comparing an EV with petrol or diesel, use the related fuel cost calculator for the combustion vehicle and keep the same journey distance. That keeps the comparison grounded in the journey rather than in broad averages.

If you are estimating the effect on your household bill, compare this result with the electricity cost calculator. The EV page estimates vehicle charging, while the appliance page is better for heaters, dryers, lighting, and other home devices.