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Gas vs. EV Cost Calculator
What switching to electric saves on fuel
Fuel is where EVs win or lose the math. Enter your driving and local prices for an honest annual comparison — electricity rate matters more than most buyers expect. Instant recalculation — no signup.
Results
Estimated annual fuel savings (EV)
$0.00
Gas $0.00/mi vs EV $0.00/mi
Gas car fuel / year$0.00
EV charging / year$0.00
Gasoline used / year$0.00
Electricity used / year$0.00
Blended charging rate$0.00
Annual savings$0.00
5-year fuel difference$0.00
Fuel only. Purchase price, insurance, maintenance, battery replacement, and resale value are not modeled — an EV can win on fuel and still lose on total cost. Public fast charging costs 2–3× home rates, so the charging mix moves the answer.
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How this gas vs. EV calculator works
Two simple divisions: annual miles ÷ MPG × gas price for the gas car, and annual miles ÷ mi/kWh × electricity rate for the EV. The difference is your yearly fuel savings. The inputs that swing the answer most are your electricity rate and your gas car's MPG — not the EV's efficiency, which varies less than people think.
Home charging is the whole game. At 16¢/kWh, 12,000 miles costs roughly $565 a year in electricity; at a 45¢ public fast charger, the same miles cost about $1,590 — nearly triple. If you cannot charge at home, model the public rate honestly using our EV charging cost calculator.
What fuel math leaves out
Fuel is one line of total cost of ownership. EVs typically save on maintenance (no oil, fewer brake jobs) but cost more to insure, and the purchase-price gap can take years of fuel savings to close. Use this calculator for the fuel line, then weigh it against price, incentives, and how long you keep cars.
It depends on your miles, gas price, and electricity rate. At 12,000 miles/year, $3.50 gas, 28 MPG, and 16¢/kWh home charging, fuel savings run roughly $950 a year. Change any input above to see your number — electricity rate swings it most.
Is home charging really that much cheaper?
Yes. Home rates (often 12–20¢/kWh) vs. public fast charging (35–55¢/kWh) can triple your per-mile cost. If you rely on public chargers, enter that rate — the savings shrink fast.
What is a typical EV efficiency in mi/kWh?
Most modern EVs land between 3 and 4 miles per kWh in mixed driving. Efficient sedans push past 4; large SUVs and trucks sit closer to 2.5. Use 3.4 as a middle default and adjust for your model.
Does this include maintenance savings?
No — fuel only. EVs generally cost less to maintain (no oil changes, less brake wear), but insurance and tires can cost more. Treat fuel savings as one input to total cost of ownership, not the verdict.
What about the higher purchase price of EVs?
Not modeled here. Divide the price gap (after incentives) by your annual fuel savings for a rough payback period in years. Long ownership and cheap home charging shorten it; expensive public charging lengthens it.
Should I use my marginal or average electricity rate?
Your average all-in rate per kWh from your bill (including delivery charges), ideally the off-peak rate if you charge overnight on time-of-use pricing.
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