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EV and Gasoline Energy Cost Comparison

Compare gasoline and billed EV charging costs for the same annual miles, using actual fuel economy, wall electricity consumption, prices and charging fees.

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Inputs that matter
Annual miles compared, Gasoline price (USD per US gallon), Gasoline economy (US MPG), Billed wall electricity (kWh per mile), and 2 more
Output to expect
Gasoline cost minus EV charging cost
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Calculate gasoline expense

Divide annual miles by positive fuel economy, then multiply by the entered price per US gallon.

Gasoline expense = annual miles ÷ miles per US gallon × USD per US gallon

Calculate billed charging expense

Use electricity at the wall or charger billing point per mile, so charging losses are included once. Add extra fees not already included in the per-kWh price.

EV charging expense = annual miles × billed kWh per mile × USD per kWh + extra charging fees

Compare the energy totals

Subtract charging expense from gasoline expense. A negative difference means EV energy expense is higher under the entered assumptions; a zero gasoline baseline has no relative percentage.

Energy cost difference = gasoline expense − EV charging expense

Updated: September 2026

Example Scenarios

12,000 miles, 30 MPG and $3.50 per gallon gives $1,400 gasoline expense. At 0.3 billed kWh per mile, $0.20 per kWh and $60 extra fees, EV expense is $780; the difference is $620.

Enter the actual public-charging price and extra fees. The difference can be negative without any error in the model.

Use annual miles for the defined commute and allocate fees consistently. Keep unrelated journeys and ownership costs in a separate record.

Common Mistakes to Avoid

Entering kWh per 100 miles into a per-mile field

Divide that figure by 100 after confirming whether it includes charging losses.

Applying an MPGe number as kWh per mile

Use a compatible measured or documented billed-electricity value; the input is not MPGe.

Reading energy savings as a purchase recommendation

Compare full ownership costs and the vehicle’s practical fit separately.

FAQ

Use billed wall or charger electricity per mile. If your source measures battery energy, reconcile charging losses before entry; do not add them twice.

Use a kWh-weighted price for the same charging scope. Add session, idle or membership fees separately only when not already included.

No. Vehicle purchase, financing, tax eligibility, insurance, maintenance, depreciation and charging equipment costs are outside this energy comparison.

No. Check current official eligibility and the actual transaction dates separately. No tax credit is applied to this calculation.

About EV and Gasoline Energy Cost Comparison

Use the same annual journey distance for both vehicles. Enter measured gasoline economy in miles per US gallon and billed wall electricity per mile, with applicable prices and additional annual charging fees. All prices are USD. The result compares energy expense; purchase, finance, insurance, maintenance and depreciation are separate.