EV Charging Cost Calculator

How to use

1. 1Pick a calculator mode: Single charge for the cost of one top-up between two state of charge points, Cost per mile for the running cost only, or Monthly cost for a full monthly and yearly running budget with an optional gas comparison.
2. 2Pick a vehicle preset to seed the usable battery capacity and the EPA combined efficiency in kWh per 100 mi, or type your own values from your car's window sticker or trip computer.
3. 3Pick an electricity price preset (US home average, off-peak, high-rate, or DC fast at low, mid, and peak network prices), or type your local rate in cents per kWh. Adjust charger efficiency if you want to model DC fast charging (close to 95 percent) or cold Level 1 charging (about 85 percent).
4. 4Fill in the mode-specific fields: starting and target SoC for Single charge, an optional trip distance for Cost per mile, or monthly distance plus optional MPG and gas price for Monthly cost.
5. 5Read the result panel for the cost in your chosen currency, the range added, the cost per kWh delivered, the cost per mile and per kilometer, monthly and yearly totals, and the EV vs gas savings comparison when both fuel inputs are present.
6. 6Click Copy summary to grab a clean text block, or Reset to restore the default Model Y Long Range example at the US average rate.

About this tool

EV Charging Cost Calculator answers the three questions every electric vehicle owner actually wants a number for. First, how much does it cost to charge from a starting state of charge to a target state of charge, at home or at a DC fast charger, in any currency. Second, what is the running cost per mile and per kilometer at the entered electricity price and the vehicle's published efficiency. Third, what is the monthly and yearly fuel bill at typical driving distances, with an optional side-by-side comparison against a gasoline vehicle on the same trip. The math is the standard, auditable formula used in every EV review and EPA window sticker. Energy added to the pack equals the usable battery capacity times the change in state of charge. Energy drawn from the grid equals that pack energy divided by the charger efficiency (the inverter, AC to DC conversion, and battery management losses that make the wall meter read more than the in-car energy gauge). Cost equals grid energy times the per-kWh price. Cost per mile equals the wall cost per kWh divided by the vehicle's mi/kWh, where mi/kWh is 100 divided by the kWh per 100 mi efficiency rating. Cost per kilometer follows by dividing through 1.609344 (the exact mile-to-kilometer ratio). Vehicle presets seed the usable battery capacity and EPA combined efficiency for the most-shopped EVs: Tesla Model 3 RWD, Model Y Long Range, Ford Mustang Mach-E LR, Ford F-150 Lightning ER, Hyundai IONIQ 5, Kia EV6, Nissan Leaf Plus, Chevy Bolt EV, Volkswagen ID.4 Pro, Rivian R1S, Cadillac Lyriq, and BMW i4 eDrive35. Electricity rate presets cover the US national residential average, a low off-peak rate, a high-rate utility, and low, mid, and peak DC fast charging prices (about 36 to 58 cents per kWh on public networks). The charger efficiency input defaults to 90 percent, which matches typical AC home charging; raise it to 95 percent for a DC fast charger or lower it to 85 percent for cold-weather Level 1 charging on a 120 V outlet. Single charge mode shows the cost to top up from a chosen SoC to a target SoC, the energy added, the energy drawn from the grid, the range added in both miles and kilometers, the effective cost per kWh delivered, and the cost per mile and per kilometer. Cost per mile mode shows the running cost only, plus an optional trip projection if you enter a distance. Monthly mode multiplies cost per mile by your monthly driving distance and reports monthly kWh, monthly cost, yearly cost, an estimated number of charging sessions (assuming the usual 20 to 80 percent window), and, when you fill in MPG and gas price, the equivalent gas vehicle bill on the same trip and the yearly savings either way. The efficiency input also shows the Wh/km, mi/kWh, and km/kWh equivalents on the fly so European users do not have to convert by hand. The Copy summary button exports a clean text block you can paste into a build log, a spreadsheet, a forum post, or a vehicle comparison. Useful for deciding between EVs, picking between home charging and DC fast charging, building a monthly EV budget, comparing electricity rates and gas pump prices, sizing a home solar array against driving needs, and answering 'is this trip cheaper in my EV or my gas car?' without pulling out a calculator. Everything runs locally in your browser; nothing is uploaded.

Free to use. Works in your browser. No signup, no login.