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EV Charging Cost Calculator

Estimate battery energy added, billed charging energy and session cost with efficiency and session fees.

EV Charging Cost Calculator

FREE ONLINE TOOL
Formula and assumptions

Battery energy = usable capacity × (target charge − initial charge)/100; billed energy = battery energy ÷ (efficiency/100); cost = billed energy × tariff + fee.

Capacity is usable, not gross. Tariff is per billed kWh; fees use the same currency. Efficiency is user supplied. Excludes time-based charges, idle fees and battery degradation. Defaults are illustrative.

60 kWh, 20→80%, efficiency 90%, tariff 0.25, fee 1: 40 kWh billed, cost 11.

DOE — charging electric vehicles

STEP BY STEP

How to use ev charging cost calculator

  1. Check the input units and assumptions.
  2. Review the result and example.

IN PRACTICE

Example

60 kWh, 20→80%, efficiency 90%, tariff 0.25, fee 1: 40 kWh billed, cost 11.

GOOD TO KNOW

Which formula and assumptions are used?

Ebat = usable capacity × (end SOC − start SOC)/100; Egrid = Ebat/(efficiency/100); cost = Egrid × tariff + fee. Capacity is usable, not gross. Tariff is per billed kWh; fees use the same currency. Efficiency is user supplied. Excludes time-based charges, idle fees and battery degradation. Defaults are illustrative.

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