EV Charging Cost Calculator
What does your electric car really cost to run? Enter your battery size, rates, and driving, and see the cost per charge, per mile, and per month — at home and at public chargers.
Most EVs: 3–4.5 mi/kWh (≈ 14–20 kWh/100 km).
~90% for AC home charging.
Monthly charging cost (home)
$0
for 1,000 miles
Estimates only. Cold weather, fast charging, and highway speeds reduce efficiency; EV night tariffs can cut home costs further.
How this EV charging calculator works
Cost per full charge = battery kWh ÷ charging efficiency × rate — you pay for the energy drawn from the wall, which is ~10% more than what lands in the pack. Cost per mile = rate ÷ (mi/kWh × charging efficiency), and the monthly figure multiplies that by your driving. The public-rate chip shows the same month if you did all your charging on paid public chargers — the gap is usually the strongest argument for a home charge point.
EV charging cost FAQ
How much does it cost to charge an EV at home?
Battery kWh × rate ÷ charging efficiency. A 60 kWh battery from empty at $0.15/kWh with 90% efficiency costs about $10; a typical 20–80% overnight top-up runs $3–6.
What is charging efficiency and why divide by it?
8–12% of energy is lost as heat in the charger, cable, and battery management on AC charging. To put 54 kWh in the pack you draw ~60 kWh from the wall — you pay for wall kWh.
How much cheaper is home charging than public?
Usually 2–4×. Home rates run $0.10–0.20/kWh (less on EV night tariffs); DC fast chargers charge $0.30–0.60/kWh. At 1,000 miles/month and 3.5 mi/kWh that's roughly $48 at home vs $130+ on fast chargers.
How do I work out my EV's cost per mile?
Rate ÷ (mi/kWh × charging efficiency). At $0.15/kWh and 3.5 mi/kWh with 90% efficiency: about 4.8¢/mile — typically a third of an equivalent gas car's fuel cost.