EV Charging Cost Calculator
Estimate EV charging cost from energy added, electricity price per kWh, charging efficiency, currency, and optional session fee.
Last reviewed: 2026-06-14
Estimated result
Wall energy Enter values
Energy cost Enter values
Total cost Enter values
Charging prices and charging speeds vary. Use this as a planning estimate.
Formula
wall energy (kWh) = energy added (kWh) / efficiencycost = wall energy (kWh) x electricity price per kWh + session feeExample
Adding 45 kWh at 90% efficiency uses about 50 kWh from the wall. At 0.28 per kWh plus a 1.50 session fee, the estimated total is 15.50.
Assumptions and limits
- The calculator does not use live charging prices.
- Public charging prices may include time-based, idle, congestion, tax, or membership fees.
- Use the rate shown on your utility bill, charging app, or station screen.
- This is not a bill, tax, or receipt estimate unless you manually include the relevant fees and taxes.
FAQ
Does this calculator know current charging prices?
No. Enter the current rate from your utility bill, charging app, or station screen.
Why include charging efficiency?
Some energy is lost as heat and conversion loss, so wall energy is usually higher than the energy added to the battery.