EV charging cost calculator
From the EPA label.
Use the price from your bill if you know it.
Zero if you charge only at home.
An example. Check your charging app.
An example. Use your local price.
Electric car running cost
Efficiency is wall-to-wheel, so charging losses are already in the kWh figure. The public price and the gas price are examples. Replace them with the prices where you charge and fill up.
Efficiency
42.9
kWh per 100 mi, Dual Large, 20 inch wheels
EPA range
300 mi
79 MPGe
Per mile
7.4 cents
Home, US average price
240 volt charge
12.0 hours
EPA, from empty
Rivian R1S charging cost by trim
| Trim | kWh per 100 mi | EPA range | Cents per mile | 1,000 miles | 240 V charge |
|---|---|---|---|---|---|
| Dual Standard, 20 inch wheels | 42.9 | 258 mi | 7.4 | $74 | 9.5 h |
| Dual Large, 20 inch wheels | 42.9 | 300 mi | 7.4 | $74 | 12.0 h |
| Dual Max, 20 inch wheels | 42.0 | 380 mi | 7.2 | $72 | 15.0 h |
| Tri Max, 22 inch wheels | 44.6 | 371 mi | 7.7 | $77 | 15.0 h |
| Quad Max, 22 inch wheels | 44.4 | 374 mi | 7.6 | $76 | 14.0 h |
Source: U.S. EPA and DOE, fueleconomy.gov, model year 2026, checked October 10, 2026. The highlighted trim is the one used for the headline figures. Prices: 17.23 cents per kWh, the 2025 US residential average from EIA Form EIA-861. The least efficient trim uses about 6 percent more electricity per mile than the most efficient.
About the Rivian R1S and its energy use
The R1S is a three-row SUV that shares its battery and drive options with the R1T. For these trims EPA lists the same efficiency and range figures for both vehicles, about 42 to 45 kWh per 100 miles.
As with the R1T, the large battery trims take 14 to 15 hours to fill from empty on a 240 volt connection, so most owners charge a little each night. The cost per mile follows the EPA figure and your price per kWh.
What it costs in other states
| Place | Cents per kWh | Cents per mile | 1,000 miles |
|---|---|---|---|
| North Dakota | 11.82 | 5.1 | $51 |
| Idaho | 11.83 | 5.1 | $51 |
| Nebraska | 12.05 | 5.2 | $52 |
| United States average | 17.23 | 7.4 | $74 |
| Hawaii | 40.40 | 17.3 | $173 |
| California | 31.35 | 13.4 | $134 |
| Massachusetts | 30.41 | 13.0 | $130 |
Source: Home charging priced at each state's 2025 average residential price from EIA Form EIA-861. Your plan may differ, and time-of-use plans can make overnight charging cheaper.
If you use public fast chargers
Public fast charging prices are set by each network and change with the place and the time. Check the price on the charger or in the app. This table shows what the Rivian R1S would cost per mile at four example prices, compared with charging at home at the US average.
| Price per kWh | Cents per mile | 1,000 miles | Versus home at US average |
|---|---|---|---|
| $0.30 | 12.9 | $129 | 1.7 times |
| $0.45 | 19.3 | $193 | 2.6 times |
| $0.60 | 25.7 | $257 | 3.5 times |
| $0.75 | 32.2 | $322 | 4.4 times |
Source: These are what-if prices, not a survey of what networks charge. Use the price you actually see.
Break-even gas price
| Where you charge | 25 mpg car | 30 mpg car | 35 mpg car | 40 mpg car |
|---|---|---|---|---|
| North Dakota price | $1.27 a gallon | $1.52 a gallon | $1.77 a gallon | $2.03 a gallon |
| US average price | $1.85 a gallon | $2.22 a gallon | $2.59 a gallon | $2.96 a gallon |
| Hawaii price | $4.33 a gallon | $5.20 a gallon | $6.06 a gallon | $6.93 a gallon |
If gas where you live costs more than the figure in the table, charging at home costs less per mile than driving a gas car with that fuel economy. If gas costs less, the gas car is cheaper per mile on fuel alone.
How we calculate it
Cost per mile is the EPA kWh per 100 miles, divided by 100, times the price per kWh. EPA measures efficiency at the wall, so charging losses are already inside the figure. Real efficiency changes with speed, temperature, tires and load, so use the EV charging cost calculator with your own numbers.
Rivian R1S charging cost questions
How much does it cost to charge a Rivian R1S?
At about 42.9 kWh per 100 miles for the Dual Large, 1,000 miles uses about 429 kWh. Multiply by your price per kWh, or use the tables on this page.
Is the R1S cheaper to charge than the R1T?
EPA lists the same energy use for the trims shown here, so for the same trim the cost per mile is the same.
How much does it cost to drive Rivian R1S 100 miles?
At about 42.9 kWh per 100 miles and the 2025 US average price of 17.23 cents per kWh, 100 miles costs about $7.39 when you charge at home.
How much does a full charge cost for Rivian R1S?
Driving the full EPA range of 300 miles takes about 129 kWh from the wall for the Dual Large, 20 inch wheels trim, which costs about $22 at the 2025 US average price. You rarely charge from empty, so most sessions cost much less.