This Tesla charging calculator prices a single charge for a Model 3, Model Y, Model S, Model X or Cybertruck, at home or at a Supercharger. It also shows how long the charge takes on your charger, how many miles it adds, and how the cost stacks up against putting gas in a regular car for the same distance.
Below the tool, each input and result is explained, along with the cost bars, the verdict and the charger time table, a worked Supercharger example and the mistakes that make charging estimates go wrong.
Tesla Charging Calculator
Pick your Tesla, set the battery level now and the level you want, choose where you plug in, then press Price This Charge.
Estimates only. Battery and consumption presets are approximate and change with model year, trim, wheels, weather and battery age. Real charging slows near the limit and in the cold. Prices are examples: check your utility bill and the price shown for each Supercharger site.
What Is a Tesla Charging Calculator?
A Tesla charging calculator turns two battery percentages into money, time and miles. From your car, the charge window and the charger, it works out the energy that goes into the pack, the energy you pay for, how long that takes and how far it will take you.
Tesla’s screens show range and percentage, not kilowatt-hours or dollars, so the calculator fills that gap for one session, such as tonight’s top-up in the garage or a road trip stop. For a monthly budget, use a tool built around your monthly miles.
Why the Same Charge Can Cost Very Different Amounts
Charging a Tesla from 20% to 80% always puts roughly the same energy into the battery. What changes is the price of that energy and how much is lost on the way in.
- Location. Home electricity is usually the cheapest energy you can buy. Supercharger prices are set per site, often change by time of day, and are typically higher than residential rates.
- Losses. Some paid energy turns into heat or runs the car while it charges. Slow 120 V charging keeps the car awake longer, so it tends to lose more.
- Charger power. Power decides time, not cost, but time matters when you are waiting at a stall.
Inputs Used in the Calculator
Model
Choosing a model fills in an approximate usable battery size, a typical consumption and the onboard charger limit. Edit any of them and the model switches to “Other Tesla” so your values are kept.
Usable Battery and Consumption
Tesla does not publish usable capacity. The presets are approximate values drawn from EPA certification data and published testing: about 60 kWh for Model 3 Rear-Wheel Drive, about 78 kWh for Model 3 and Model Y Long Range, about 95 kWh for Model S and Model X, and about 122 kWh for Cybertruck AWD. Consumption is in watt-hours per mile; your own figure from the Energy screen beats any preset.
Onboard AC Limit
On AC charging, the car’s onboard charger converts the power, and it caps the current. Tesla lists 48 A for most models, while Model 3 Rear-Wheel Drive and the standard Model Y versions are capped at 32 A. A Wall Connector set to 48 A cannot charge a 32 A car any faster.
Battery Now and Charge Limit
Enter the percentage on your screen and the limit you plan to set. The car’s screen or app shows Tesla’s recommended daily and trip limits for your battery.
Charger
Choose a 120 V outlet at 12 A, the Mobile Connector on a NEMA 14-50 outlet at 32 A, a Wall Connector on a 60 A breaker at 48 A, or a Supercharger.
Prices and Efficiency
Enter your home rate from your bill, or your off-peak rate if you charge at night, and the Supercharger price the app shows for your site. Both start as examples. Charging efficiency is the share of paid energy that reaches the battery: 90% by default, 85% when you pick the 120 V outlet.
Average Supercharger Power
Shown only for the Supercharger. Use the session average, not the stall’s peak rating, because power falls as the battery fills.
Gas Car to Beat
The gas price and mpg of a car you might otherwise drive, used for the gas comparison and the verdict.
How the Calculator Works
Each result comes from a few plain steps:
- Energy added = usable battery × (charge limit − battery now) ÷ 100.
- Energy you pay for = energy added ÷ charging efficiency.
- Cost = energy you pay for × the price at that location.
- AC power = 240 V or 120 V × the lower of the charger’s current and the car’s onboard limit, ÷ 1,000.
- Time = energy you pay for ÷ power. For a Supercharger, the average power you enter is used.
- Range added = energy added × 1,000 ÷ Wh per mile.
- Gas for the same miles = range added ÷ mpg × gas price.
Here are the steps for the default case: a Model 3 Long Range with about 78 kWh usable, charged from 20% to 80% on a Wall Connector at 90% efficiency and an example rate of $0.17 per kWh.
| Step | Math | Result |
|---|---|---|
| Added | 78 × 60% | 46.8 kWh |
| Paid for | 46.8 ÷ 0.90 | 52.0 kWh |
| Cost | 52.0 × $0.17 | $8.84 |
| Power | 240 V × 48 A | 11.52 kW |
| Time | 52.0 ÷ 11.52 | 4 h 31 min |
| Range | 46,800 ÷ 235 | ≈199 mi |
That is about 44 miles of range per hour of charging, the same figure Tesla lists for a Model 3 on a Wall Connector at 48 A, which is a good sign the presets are in the right area.
Reading Your Results
Cost of This Charge
What you pay for the session at the price for your charger, with the energy added and the time underneath.
Charging Time
Time at a steady power. Sessions slow near the limit and in the cold, so treat it as a minimum in winter.
Range Added
Miles from the energy added at your consumption. Highway speed, cold, big wheels and towing all shrink it.
Energy You Pay For
The kilowatt-hours on your meter or Supercharger receipt. It is always higher than the energy stored, because of charging losses.
Cost Per Mile, Gas for the Same Miles and the Matching Gas Price
Cost per mile is the session cost divided by the range added. The gas card shows what your comparison car would spend on fuel for the same distance. The last card turns your charging cost into a gas price: below it, the gas car would be cheaper per mile.
The Cost Bars, Charger Table and Verdict
The three bars price the same session at your home rate, at the Supercharger price and as gas for the same miles. Green is where you plug in, gray is the other option and red is the gas car. The table below the cards shows how long the same charge takes on each charger, and flags rows held back by the car’s onboard limit.
The verdict box compares the session cost with the gas for the same miles:
- Big win over gas: the charge costs at least 50% less than the gas.
- Clear saving: 15% to 50% less.
- Close to gas: within 15% either way.
- Pricier than gas: more than 15% above the gas cost.
It also gives the electricity price at which gas would win. Extra notes appear when the onboard limit caps a charger, a home charge needs more than 12 hours, or a Supercharger session runs above 80%.
How to Use It Step by Step
- Pick your model, then edit the battery, consumption or amps if you know your car’s own figures.
- Enter the battery percentage now and the charge limit you will set.
- Choose the charger you will use.
- Replace the example prices with your home rate and the Supercharger price from the app.
- For a Supercharger, enter an average power for the session.
- Enter the gas price and mpg of the car you want to compare with.
- Press Price This Charge and read the cost, the time table and the verdict.
Example: A Road Trip Stop in a Cybertruck
A Cybertruck AWD arrives at a Supercharger with 10% and leaves at 60%. Using the preset of about 122 kWh usable and 360 Wh per mile, 90% efficiency, an example price of $0.45 per kWh and an average of 120 kW:
- Energy added is 61.0 kWh, and you pay for about 67.8 kWh.
- The session costs about $30.50 and takes about 34 minutes.
- It adds about 169 miles, so the cost is about 18 cents a mile.
- A 30 mpg gas car would spend about $19.77 on fuel for those miles at an example $3.50 a gallon, so the verdict reads “Pricier than gas”.
The same charge at the $0.17 home rate costs about $11.52, which is why most owners Supercharge mainly on trips.
Who Should Use a Tesla Charging Calculator?
- New owners deciding whether a 240 V circuit is worth installing can compare chargers in the time table.
- Road trippers can price each Supercharger stop and see what stopping around 60% or 70% saves.
- Shoppers weighing a Tesla against a gas car can see the cost per mile at their own prices.
Common Mistakes and Tips
Using the Full Pack Size
Nominal pack figures are higher than the energy you can actually use. Start from the presets or a trusted figure for your car.
Forgetting the Onboard Limit
A 48 A charger does not help a car that accepts 32 A. On a Model 3 Rear-Wheel Drive, a Mobile Connector on a 14-50 outlet charges about as fast as a Wall Connector.
Using the Stall’s Peak Power
Tesla notes that charging is fastest at a low battery and slows as it fills, and that reaching 100% takes much longer than reaching 80%. A session’s average is far below the number on the stall.
Ignoring How Superchargers Bill
Tesla bills per kWh where it can and per minute, by power tier, where it cannot. Many sites charge more at peak hours, and busy sites can add congestion fees, so move the car when you finish.
Wiring Without an Electrician
The charger’s current is 80% of the breaker rating, such as 48 A on a 60 A breaker. A licensed electrician should size the circuit.
Related Car Calculators
- EV Charging Cost Calculator
- Gas Calculator
- Road Trip Gas Calculator
- Driving Time Calculator
- Commute Calculator
- Miles Per Year Calculator
- Fuel Efficiency Calculator
- Tesla Lease Calculator
Frequently Asked Questions
How much does it cost to charge a Tesla at home?
Multiply the energy you pay for by your electricity rate. A Model 3 Long Range charged from 20% to 80% needs about 52 kWh from the wall including losses, so at an example 17 cents per kWh it costs about 8.84 dollars.
How long does it take to charge a Tesla on a Wall Connector?
At 48 A on a 60 A breaker, Tesla lists up to about 44 miles of range per hour for a Model 3 or Model Y. A 20% to 80% charge on a Model 3 Long Range takes about 4.5 hours that way.
Is Supercharging cheaper than gas?
Sometimes. It depends on the site price, your car consumption and the gas car you compare with. Enter both in the calculator. The verdict tells you whether the charge beats gas and the electricity price at which gas would win.
Why does my Tesla charge slower above 80 percent?
Lithium-ion batteries accept charge more slowly as they fill, so the car lowers the power. Tesla notes that reaching 100% takes much longer than reaching 80%, which matters most at a Supercharger.
Does a Wall Connector charge faster than a Mobile Connector?
Only if your car accepts more than 32 A. The Mobile Connector on a NEMA 14-50 outlet delivers up to 32 A, while a Wall Connector on a 60 A breaker delivers 48 A.
How many kWh is a Tesla battery?
Tesla does not publish usable capacity. Approximate figures are about 60 kWh for Model 3 Rear-Wheel Drive, about 78 kWh for the Long Range Model 3 and Model Y, about 95 kWh for Model S and Model X, and about 122 kWh for Cybertruck AWD.
Why do I pay for more kWh than the battery gains?
Some energy becomes heat in the charger and cables, and some powers the car while it charges. AC losses of about 10% to 15% are typical, and slow 120 V charging often loses more.