EV Charging Cost Calculator
EV Charging Cost Calculator. Estimate electricity spending from usage. Enter your values and view the result.
EV Charging Cost Calculator
Estimate electricity spending from usage.
Use the calculation engine below to model your exact costs with custom fuel prices, distances, and vehicle efficiencies:
EV Charging Cost Calculator: inputs
Adjust sliders or enter exact figures
Monthly Fuel Budget
Real-Time Visual Breakdown
Comparing your expense against alternative vehicle classes
Price Fluctuation Stress Test
See how unexpected gas price surges would impact your monthly budget
How EV Charging Cost Calculator Works
This tool works by converting electric vehicle (EV) miles into kilowatt-hours (kWh) of electricity, adding charging losses, and multiplying by the electricity rate.
- Step 1
Enter driving distance
Type miles or kilometers driven in the period.
- Step 2
Enter EV efficiency
Use miles per kWh, or kWh per 100 miles. Most EVs return 3 to 4.5 miles per kWh.
- Step 3
Add charging efficiency
Set the share of wall energy that reaches the battery, often 85% to 90%.
- Step 4
Enter the electricity rate
Use the home rate per kWh or the public charger rate, then read the charging cost.
EV Charging Cost Calculator Formula
The formula divides distance by efficiency, adjusts for charging losses, and multiplies by the electricity price.
Battery Energy (kWh) = Distance ÷ Miles per kWh
Wall Energy (kWh) = Battery Energy ÷ Charging Efficiency
Charging Cost = Wall Energy × Price per kWh
- Miles per kWh
- = EV efficiency
- Charging Efficiency
- = battery energy ÷ wall energy
- Price per kWh
- = electricity rate at home or at a public charger
Worked Example
- An EV owner drives 1,100 miles (1,770 km) per month at 3.5 miles per kWh (17.8 kWh per 100 km).
- Battery energy = 1,100 ÷ 3.5 = 314.3 kWh.
- Wall energy at 90% efficiency = 314.3 ÷ 0.90 = 349.2 kWh.
- Charging cost at $0.17 per kWh = $59.37 per month, or $0.054 per mile.
EV Charging Cost Calculator Conversion Table
The table converts electricity rates into EV cost per mile and per 100 km, at 3.5 miles per kWh and 90% charging efficiency, with the gasoline price that matches each rate for a 30 MPG car.
| Rate / kWh | Cost / Mile | Cost / 100 mi | Cost / 100 km | Equal Gas Price (30 MPG) |
|---|---|---|---|---|
| $0.10 (off-peak home) | $0.032 | $3.17 | $1.97 | $0.95 |
| $0.13 | $0.041 | $4.13 | $2.56 | $1.24 |
| $0.16 (average home) | $0.051 | $5.08 | $3.16 | $1.52 |
| $0.20 | $0.063 | $6.35 | $3.95 | $1.90 |
| $0.30 (Level 2 public) | $0.095 | $9.52 | $5.92 | $2.86 |
| $0.40 | $0.127 | $12.70 | $7.89 | $3.81 |
| $0.50 (DC fast) | $0.159 | $15.87 | $9.86 | $4.76 |
What is an EV Charging Cost Calculator?
An EV Charging Cost Calculator is an electricity cost tool that estimates what it costs to charge an electric vehicle for a given distance.
EV owners pay for energy in kWh, not gallons. The price changes by place and time: off-peak home rates fall near $0.10 per kWh, while DC fast chargers charge $0.40 to $0.60 per kWh. The EV Charging Cost Calculator turns those rates into cost per mile and a matching gasoline price.
The calculator includes charging losses. Ignoring the 10% to 15% lost as heat during charging understates the real bill.
What are the uses of an EV Charging Cost Calculator?
There are 4 main uses of the EV Charging Cost Calculator, including home charging budgets, public charger comparisons, and EV shopping.
Budget home charging
Estimate the monthly addition to the electric bill.
Compare charging options
Price home, workplace, Level 2, and DC fast charging per trip.
Choose a rate plan
Measure savings from an off-peak or EV-specific utility plan.
Plan an EV road trip
Price fast-charging stops on a long route.