EV Cost per km Calculator

How EV Cost Per Kilometer Is Calculated

Calculating the true cost per kilometer for an electric vehicle helps compare it directly against gasoline vehicles and understand your actual running costs.

Formula: Cost per km = (kWh per 100 km × Electricity Rate) / 100

Where:

• kWh per 100 km = vehicle’s energy consumption (from spec sheet or onboard display)
• Electricity Rate = your utility rate in $/kWh (or local currency)
• Dividing by 100 converts from per-100-km to per-km

Worked Example: A Tesla Model 3 uses 14.9 kWh/100km. Electricity costs $0.15/kWh:

• Cost per km = (14.9 × 0.15) / 100 = 2.235 / 100 = $0.022 per km
• Or about $2.24 per 100 km

Compare to a gasoline car using 7L/100km at $1.60/L:

• Gas cost = 7 × $1.60 / 100 = $11.20 per 100 km

The EV costs about 5× less per kilometer in this example.

Typical EV Consumption Values:

• Small EV (Leaf, Bolt): 14–17 kWh/100km
• Mid-size EV (Model 3, Ioniq 6): 13–16 kWh/100km
• Large SUV EV (Model X, Rivian): 20–28 kWh/100km

Charging Cost Notes:

• Home charging (overnight, off-peak): typically cheapest
• Public Level 2 charger: 20–50% more than home
• DC fast charger: often 2–3× home rate
• Factor in charging losses (~10–15%): actual consumption is slightly higher than EPA rating