What is left out on purpose
Purchase price, insurance, tires, and depreciation are not in this energy comparison. Home charging at the EIA residential average is not the same as a 400-volt highway charger billed per minute or per kWh by a network.
Your numbers
Charging versus filling up
Starts from the latest EIA pump and electricity averages for your state. Type your own prices over them. Mileage is the same for both cars.Gas vehicle
MPG
$/ galLeave blank for the Sep 14, 2026 EIA average for Texas. A station price is better if you have one.
Electric vehicle
kWh / 100 mi
¢ / kWhLeave blank to use the state average
Estimated annual EV energy savings
$1,023Driving energy only. Not the car price, insurance, or upkeepGasoline per year$1,631428.6 gallons
EV charging per year$6093818.18 wall kWh
Break-even gas price$1.42At your EV efficiency and rate
Electricity: EIA Texas residential average for June 2026. Enter your bill rate for a personal result.
How we got this
- Gas vehicle energy428.6 gal × $3.81$1,631
- EV wall energy3818.18 kWh × 15.94¢$609
- Estimated EV energy savingsYearly driving energy only$1,023
What we assumed
- This compares driving energy only. Not the car price, insurance, upkeep, depreciation, taxes, or extra public charging fees.
- EV efficiency is battery energy. Charging loss is added to estimate what you pull from the wall.
- A state residential average is not your utility rate. Type your own if you have it.
Technical details
Method vehicle-energy-v1.1.0Data eia-electricity-residential-2026-06-v1, eia-gasoline-regular-weekly-2026-09-14-v1
Discrepancy in the numbers? You can click Report incorrect result below or email hello@costanswer.com with the Method and Data lines.
Guide
Yearly charging versus gasoline
Miles, MPG, a gas price, EV efficiency, and a state electricity rate become two energy bills. The gas price can be an EIA geography average or a pump price you type. Public fast charging is not home charging.
Questions about this calculator
Does this include the federal EV tax credit?
No. This page is energy cost only. Credits have eligibility rules this engine does not apply.
Does this include insurance or depreciation?
No. It is energy cost per the miles, efficiency, and rates you enter, not total cost of ownership.
Terms used here
- kWh/100 miles
- A common EV efficiency measure. Lower is less electricity per mile.
- MPG
- Miles per gallon for the gas vehicle in the comparison.
Practical tips
If you charge at work for free, the EV side of this comparison is overstated.
Use a winter MPG and a winter kWh/100 mi if that is your climate.
Limits and caveats
Energy-cost estimate from averages or your overrides. Not a TCO and not a buying recommendation.
Results are for information. They are not legal, tax, medical, or financial advice. How the math is maintained · Report a wrong figure.
Engine notes
Rounding, versioning, and omissions that sit beside the guide rather than repeating it.
- Yearly gallons. Miles divided by MPG gives gallons. Times the pump price gives yearly gasoline cost. The price starts at the latest EIA weekly average for your state or PADD region, and a station price you type replaces it.
- Electricity at the wall. EV efficiency is battery energy. Charging loss is added to estimate what you pull from the wall.
- Same miles for both. Both yearly costs use the same miles. We show the difference and a break even gas price. That is not the full cost of owning a car.