Tesla Charging Cost Calculator

A Tesla charging cost calculator estimates the energy, cost, and driving range added by charging an electric vehicle from a starting charge level to a target level, at a chosen charging method and electricity rate.

• Vehicle presets ship with specifications for 15 popular electric vehicles, covering all current Tesla models plus the Rivian R1T, Chevrolet Bolt EUV, Ford Mustang Mach-E, Hyundai Ioniq 5, Kia EV6, BMW iX, Mercedes EQS, Volkswagen ID.4, and Nissan Ariya, auto-filling battery capacity and EPA estimated range. Either figure can be overridden for a different trim or battery configuration.
• Current charge level and target charge level are entered as percentages of battery capacity, for example 20 for a battery sitting at 20%, 80 for a target of 80%.
• Charging method sets the power delivered: Home Level 1 (a standard 120V outlet, roughly 1.4 kW), Home Level 2 (a 240V circuit, roughly 7.7 kW), or DC Fast/Supercharger (approximately 150 kW).
• Settings holds the electricity rate, a separate DC fast-charging rate, charging efficiency, and the number of charges per month used for the monthly cost projection. All numeric fields accept decimals, fractions (3/4), and mixed numbers (1 1/2).
• A step-by-step view, in Settings, shows the full derivation with substituted values for each output.

The formula for energy needed is: Battery Capacity x (Target% - Current%) / 100 / (Efficiency / 100). Charging cost equals the energy needed multiplied by the applicable electricity rate. Range added equals EPA range multiplied by (Target% - Current%) / 100.

A 75 kWh battery charged from 20% to 80% at 90% efficiency needs 75 x 0.6 / 0.9 = 50 kWh. At $0.15 per kWh, that costs 50 x 0.15 = $7.50. On a vehicle rated for 250 miles of EPA range, the same 60-percentage-point charge adds 250 x 0.6 = 150 miles of range.

Charging costs vary dramatically depending on the vehicle, electricity pricing, and charging method. Comparing scenarios side by side helps drivers make informed decisions about when and where to charge.

• Daily Commuters: Enter a typical 20% to 80% charge cycle at a home electricity rate to see the daily and monthly cost of powering a round-trip commute. Compare Level 1 overnight charging against a dedicated Level 2 EVSE to understand the time difference.
• Road Trip Planning: Switch the charging method to DC Fast / Supercharger and set a 10% to 90% charge range to estimate per-stop costs at public fast chargers along a highway route. Multiply by the number of planned stops for total trip charging expense.
• Vehicle Comparison Shopping: Swap between different EV models to compare how battery size and efficiency ratings affect monthly charging budgets. A larger battery costs more per full charge but may require fewer sessions if the vehicle covers more miles per charge.
• Solar and Off-Peak Optimization: Adjust the home electricity rate to reflect time-of-use pricing tiers or solar net metering credits. Entering a rate of $0.08/kWh for overnight charging versus $0.30/kWh for peak hours reveals how scheduling shifts can cut costs significantly.
• Fleet Management: Estimate per-vehicle charging expenses for delivery vans or company cars by entering the fleet vehicle specs and local commercial electricity rates. Multiply the monthly cost by fleet size to project total energy expenditure.
• Rental and Ride-Share Drivers: Determine per-mile energy costs to factor into fare calculations or mileage reimbursement requests. Knowing the cost per mile helps set profitable pricing thresholds for ride-share or delivery work.