How EV Cost Calculation Works
Electric vehicles use kilowatt-hours (kWh) of electricity instead of liters or gallons of fuel. The cost to charge an EV depends on your local electricity rate and your vehicle's efficiency.
Formula:
Energy Needed (kWh) = Distance (km) × Efficiency (kWh/100km) ÷ 100
Total Cost = Energy Needed × Electricity Rate per kWh
Energy Needed (kWh) = Distance (km) × Efficiency (kWh/100km) ÷ 100
Total Cost = Energy Needed × Electricity Rate per kWh
Example: 300 km trip, $0.13/kWh, 18 kWh/100km efficiency
Energy needed = 300 × 18 ÷ 100 = 54 kWh
Total cost = 54 × $0.13 = $7.02
Energy needed = 300 × 18 ÷ 100 = 54 kWh
Total cost = 54 × $0.13 = $7.02
EV vs Gas: Cost Comparison
Electric vehicles are typically much cheaper to operate than gas vehicles. Here's a comparison:
| Vehicle Type | Efficiency | Energy Cost | Cost/100km |
|---|---|---|---|
| Tesla Model 3 | 15 kWh/100km | $0.13/kWh | $1.95 |
| Nissan Leaf | 18 kWh/100km | $0.13/kWh | $2.34 |
| Gas Car (7L/100km) | 7 L/100km | $1.50/L | $10.50 |
| Gas SUV (11L/100km) | 11 L/100km | $1.50/L | $16.50 |
Frequently Asked Questions
How much does it cost to charge an electric vehicle?
It depends on your electricity rate and vehicle efficiency. On average, charging
an EV costs $0.03-0.05 per kilometer, compared to $0.08-0.15 per kilometer for gas vehicles.
Where do I find my EV's efficiency rating?
Check your vehicle's specifications, the EPA sticker, or your car's trip
computer. Most EVs display kWh/100km or mi/kWh efficiency.
Does this include public charging station costs?
This calculator uses your electricity rate. Public charging stations often cost
more ($0.25-0.50/kWh). For public charging, enter the station's rate instead of your home rate.
How do I convert MPGe to kWh/100km?
MPGe (miles per gallon equivalent) can be converted: kWh/100mi = 3,360 ÷ MPGe.
Then convert to kWh/100km by multiplying by 0.621.