EV vs Gas Cost Per Mile in Hawaii
At Hawaii's average prices, a Tesla Model 3 RWD costs an estimated $0.120 a mile to charge at home and a 30 mpg gas car $0.153 a mile in fuel: $400.00 a year apart over 12,000 miles. The gap is narrow here: at 48.0¢/kWh, charging costs about 78% of what the gas car spends per mile.
State data
What Hawaii pays
- Home electricity
- 48.0¢/kWhEIA Electric Power Monthly, table 5.6.A · EIA, July 2026 (data as of 2026-09-28)
- Gasoline
- $4.60/galEIA weekly regional / AAA state averages, 2025–26 reference
- EV used for the page
- Tesla Model 3 RWD, 25 kWh/100 miEPA, fueleconomy.gov (combined)
Hawaii has the highest electricity rate of the 51 on this site: 48.0¢/kWh. At $4.60 a gallon, Hawaii is in the $3.80-and-up gasoline band on this site.
Statewide averages. Put your own rate and pump price in the calculator above.
EV vs gas cost per mile
F01Scenario A
Sets the electricity rate. Pick US average if you're not sure.
From EIA for Hawaii. Use the rate on your bill if you know it.
Rate used: 48.0¢/kWh · Hawaii · EIA, July 2026 · gasoline $4.60/gal (2025–26 ref.) (data as of 2026-09-28) ·
Estimated savings per year (12,000 miles)
EV $0.120 a mile vs gas $0.153 a mile, home charging.
- EV cost per mile (EPA kWh/100 mi, at the wall)
- $0.120
- Gas cost per mile
- $0.153
- EV, 12,000 miles a year
- $1,440.00
- Gas car, 12,000 miles a year
- $1,840.00
- Savings per year
- $400.00
- Prices used
- electricity 48.0¢/kWh · gasoline $4.60/gal (Hawaii)
Estimate. Formula and sources are under “How it works”. Change any input; the result updates as you type.
Worked example
Worked example: Model 3 RWD vs a 30 mpg car in Hawaii
At 48.0¢/kWh, a Model 3 RWD (25 kWh per 100 miles, EPA) draws 25 kWh from the wall for every 100 miles (the EPA measures it at the wall), so each mile costs $0.120. A 30 mpg car at $4.60/gal spends $0.153 a mile. Over 12,000 miles: $1,440.00 for the EV, $1,840.00 for gasoline, a difference of $400.00 a year (fuel only). The EV would lose its per-mile edge at a rate above 61.3¢/kWh.
Questions
FAQ
Is charging an EV cheaper than gas in Hawaii?
At Hawaii's average prices, yes for the page's example: $0.120 a mile for a Model 3 RWD at home against $0.153 for a 30 mpg car, $400.00 a year over 12,000 miles. The EV would lose its fuel-cost edge only above about 61.3¢/kWh, or against a gas car rated above 38 mpg. Both prices are editable above.
What about public fast charging in Hawaii?
Fast chargers usually charge more per kWh than a home rate. This page uses Hawaii's home average, 48.0¢/kWh. To see the cost per mile on the road, type the charger's price per kWh into the electricity rate field; the gas side stays at $4.60/gal.
How do time-of-use rates change this in Hawaii?
The EV's cost per mile moves in direct proportion to the rate you charge at. If an overnight rate were half of 48.0¢/kWh (24.0¢/kWh), the Model 3 RWD would cost $0.060 a mile instead of $0.120. Check your utility's tariff for the real overnight rate and type it in.
Compare
States with a similar electricity rate
The 4 states whose electricity rate is closest to Hawaii's 48.0¢/kWh:
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