Tesla Charging Cost Calculator: Home, Supercharger and Per-Mile Cost
Enter your Tesla model, current and target battery percentage, and your electricity rate to instantly see the cost of a single charge, the cost per mile, and your projected annual charging bill. Switch between home charging and Supercharger rates to compare the two. The show-your-work panel walks through every step of the math with your actual numbers.
How to calculate Tesla charging cost
Tesla charging cost depends on three variables: how much energy you add, where you charge, and the rate you pay. The core formula is straightforward:
- Energy added (kWh) = battery capacity x (target % - start %) / 100
- Wall draw (kWh) = energy added / charger efficiency (typically 85-92% for AC home charging)
- Session cost = wall draw x rate per kWh
For example, charging a Model Y Long Range (79 kWh) from 20% to 80% adds 47.4 kWh to the battery. With a charger efficiency of 90%, the wall draws 52.7 kWh. At a home rate of $0.16/kWh, that session costs about $8.43.
For per-mile cost, the calculation is: (your real-world kWh/100 mi / charger efficiency) x rate / 100. A Model Y using 26 kWh/100 mi at 90% charger efficiency draws 28.9 kWh from the wall per 100 miles. At $0.16/kWh, that is $0.046 per mile.
Home charging vs. Supercharger cost
The single biggest factor in your Tesla charging bill is where you charge. Home Level 2 charging (using a Tesla Wall Connector or a third-party J1772 EVSE) typically costs $0.10-$0.30 per kWh depending on your utility and state. Tesla Superchargers charge $0.25-$0.50 per kWh at most U.S. locations, with pricing displayed in the Tesla app before you start a session.
If you charge 85% at home and 15% at Superchargers, and home is $0.16/kWh while Supercharger is $0.33/kWh, your blended rate is about $0.186/kWh - a 16% premium over pure-home charging. Drivers who rely heavily on Superchargers during road trips can see their annual charging cost double versus charging exclusively at home.
Time-of-use (TOU) rates from your utility can reduce the home rate to $0.07-$0.12/kWh during off-peak overnight hours in many states. Scheduling charging via the Tesla app to begin after midnight is one of the highest-impact ways to reduce your charging cost.
Charger efficiency and what it means for your bill
Not all the electricity drawn from the wall ends up in the battery. AC charging through a Level 1 or Level 2 charger involves a conversion from AC to DC inside the car's onboard charger, and some energy is lost as heat. Tesla home charging is typically 87-92% efficient. DC fast charging (Superchargers) bypasses the onboard converter and delivers power directly to the battery, making it slightly more efficient at 93-95%, but the higher per-kWh rate more than offsets this advantage.
This calculator uses charger efficiency as a multiplier on the wall draw, so the cost shown reflects what your utility meter actually records, not just the energy that enters the battery. Setting charger efficiency to 100% will show the theoretical minimum cost with no conversion losses.
Annual Tesla charging cost and how to lower it
The average American drives about 13,500 miles per year. A Model Y Long Range owner using 26 kWh/100 mi at 90% charger efficiency draws about 29 kWh from the wall per 100 miles, or roughly 3,915 kWh per year. At $0.16/kWh, that is about $626 per year - compared to $1,800-$2,500 for a comparable gasoline car at current gas prices.
Ways to reduce your annual charging cost:
- Use a time-of-use electricity plan and schedule charging overnight.
- Maximize home charging and minimize Supercharger use for day-to-day driving.
- Keep tire pressure at the Tesla-recommended level to improve efficiency.
- Use scheduled departure to pre-condition the cabin while still plugged in, instead of drawing from the battery.
- Avoid frequent charging above 90% or below 10%, which can slightly reduce long-term battery capacity.
Tesla model battery and efficiency reference
| Model | Usable kWh | kWh/100 mi | Est. range (mi) | Full charge @ $0.16/kWh |
|---|---|---|---|---|
| Model 3 RWD | 57.5 | 26 | 221 | $10.22 |
| Model 3 Long Range | 82.0 | 24 | 342 | $14.58 |
| Model 3 Performance | 82.0 | 26 | 315 | $14.58 |
| Model Y RWD | 57.5 | 28 | 205 | $10.22 |
| Model Y Long Range | 79.0 | 26 | 304 | $14.04 |
| Model Y Performance | 79.0 | 30 | 263 | $14.04 |
| Model S Long Range | 100.0 | 28 | 357 | $17.78 |
| Model S Plaid | 100.0 | 30 | 333 | $17.78 |
| Model X Long Range | 100.0 | 32 | 313 | $17.78 |
| Model X Plaid | 100.0 | 34 | 294 | $17.78 |
| Cybertruck RWD | 123.0 | 34 | 362 | $21.87 |
| Cybertruck AWD | 123.0 | 30 | 410 | $21.87 |
Usable battery capacity and typical real-world efficiency for current Tesla models. Actual range varies with speed, temperature, and driving style.
Frequently asked questions
How much does it cost to fully charge a Tesla?
It depends on the model and your electricity rate. A Model Y Long Range (79 kWh) costs about $12.64 at a home rate of $0.16/kWh, or about $26.07 at a Supercharger rate of $0.33/kWh. A Model S or X with a 100 kWh battery costs around $16 at home and $33 at a Supercharger. Use this calculator with your actual rate and battery level to get an exact figure.
How much does Tesla Supercharging cost per kWh?
Tesla Supercharger rates vary by location and time of day, typically ranging from $0.25 to $0.50 per kWh in the United States. Some high-demand stations charge more. You can see the exact rate for any Supercharger in the Tesla app before you start a session. A few states still price Supercharging by the minute rather than by kWh due to local regulations.
What is the cheapest way to charge a Tesla?
Home charging on a time-of-use electricity plan during off-peak hours (typically overnight) is the cheapest option for most owners, often bringing the rate below $0.10/kWh. Installing a Level 2 charger (Tesla Wall Connector or third-party EVSE) at home is a one-time cost of $200-$800 that pays off quickly in lower charging costs compared to Supercharging.
Why does my Supercharger bill cost more than I expected?
Several factors can push Supercharger costs higher than expected. Idle fees apply if you stay plugged in after charging is complete. Some locations price by the minute rather than by kWh when local regulations prohibit per-kWh billing, which can be more expensive if your car is charging slowly. Congestion pricing at busy locations can raise rates during peak hours. Always check the current rate in the Tesla app before starting a session.
How do I calculate Tesla charging cost per mile?
Divide your real-world energy consumption (kWh per 100 miles) by your charger efficiency, then multiply by your rate per kWh, and divide by 100. For example: 26 kWh/100 mi / 0.90 efficiency x $0.16/kWh / 100 = $0.046 per mile. This calculator does all of this automatically based on your model and inputs.
Does charging to 100% every day damage a Tesla battery?
Tesla recommends keeping daily charging at 80-90% for regular use, reserving 100% charging for long trips the day before departure. Regularly topping off to 100% can accelerate degradation slightly over years, though Tesla's battery management system provides significant protection. Charging to 80% for daily driving is a common practice among long-term owners.
How long does it take to charge a Tesla at home?
On a standard 120V outlet (Level 1), a Tesla gains about 3-5 miles of range per hour - charging a Model Y from 20% to 80% would take 30-40 hours. On a 240V Level 2 charger with a Tesla Wall Connector, the same charge takes 6-8 hours. Superchargers can add up to 200 miles of range in 15 minutes on the latest V3 hardware.