EV Charging Cost Calculator — Per Charge & Per Mile

How to use

1. Enter battery capacity and the charge window you typically use (e.g. 20% to 80%).
2. Set your electricity rate and charging efficiency — 90% is a fair default.
3. Add the car's rated range for per-mile figures.
4. Optionally add gas price, MPG and annual miles for the comparison.

General information only — not medical, financial or legal advice. Figures cross-checked against public official sources (IRS / HMRC / NHS / WHO guidance); content last reviewed September 2026. For decisions that matter, confirm with a licensed professional in your country.

About this tool

Electricity is cheaper than gasoline, but cheaper deserves numbers, and public DC fast charging deserves honesty. This calculator computes what a charging session actually costs: battery size × your charge window, divided by real charging efficiency (85–95% is typical, because heat and conversion losses eat 5–15% of every kWh), times your electricity rate. From there you get cost per full charge, cost per mile and cost per 100 miles, plus an optional head-to-head against a gas car: enter fuel price and MPG and it shows the savings per 100 miles and per year at your annual mileage. Home charging at a normal residential rate is where EVs shine; road-trip fast charging at nearly double the rate narrows the gap — so compare both before you budget. All the math runs locally in your browser; nothing is uploaded anywhere.

FAQ

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