EV Charging Cost Calculator
Calculate the cost to charge your electric vehicle at home or at public DC fast chargers. Compare Level 1, Level 2, and DC fast charging costs, time-of-use rates, solar offsets, and per-mile costs.
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How to Use This Calculator
Enter your EV's battery size (kWh), your electricity rate, and your monthly miles. Results show full charge cost, cost per mile, and monthly charging cost. Use Home Charging to compare Level 1 vs Level 2 with charging time. Use Public Charging for DC fast charge session costs. Switch to Professional for time-of-use rates, solar offsets, and year-5 range estimates.
Formula
Full charge cost = (Battery kWh ÷ efficiency) × rate • Cost/mile = (rate ÷ efficiency) ÷ mi/kWh
Example
75 kWh battery, $0.13/kWh, 90% efficiency, 4 mi/kWh: Full charge = $10.83, Cost/mile = $0.036, 1,000 mi/month = $36/month
Frequently Asked Questions
- For a 75 kWh battery at $0.13/kWh with 90% efficiency: cost = (75 ÷ 0.9) × $0.13 = $10.83 for a full charge. With a larger battery or higher electricity rate, costs increase proportionally.
- Yes — significantly. Home electricity typically costs $0.10–0.18/kWh, while DC fast charge networks charge $0.28–0.48/kWh. Home charging is usually 3–4× cheaper per kWh.
- Level 1 uses a standard 120V outlet and delivers 1.4 kW — charging about 4–5 miles per hour. Level 2 uses a 240V outlet and delivers 7.2–11.5 kW — charging 20–35 miles per hour. Level 2 is the standard home option for daily driving.
- Many utilities offer time-of-use plans with off-peak rates (midnight–6am) as low as $0.05–0.10/kWh versus peak rates of $0.20–0.40/kWh. Scheduling overnight charging can cut your charging bill by 40–60%.
- EV chargers lose some energy as heat during charging. Level 2 is about 85–95% efficient; Level 1 is similar. This means for a 75 kWh battery you draw more than 75 kWh from the wall to achieve a full charge.