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EV charging cost calculator

What an EV charge actually costs at home vs DC fast-charge: kWh per 100mi × $/kWh, with day/night utility rate windows.

Monthly EV charging cost

$6.97 per 100 miles

Savings vs gas

Gas estimate: $133.93 per month

Show the work

  • Grid kWh including losses311.1 kWh
  • Home charging energy248.9 kWh
  • Fast charging energy62.2 kWh
  • Gas comparison cost$133.93

EV charging cost is a blended energy-price problem

The core formula is:

Monthly kWh = miles x kWh per 100 miles / 100

Then adjust for charging losses and split the energy between home charging and fast charging.

The gas comparison is:

Gas cost = miles / MPG x price per gallon

Use the blended result to evaluate commute cost, road-trip charging, time-of-use rates, and whether installing a home charger changes the economics enough to matter.

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