Wh to kWh Calculator
Enter watt-hours below — the kilowatt-hours update instantly.
How do you convert Wh to kWh?
Divide watt-hours by 1,000. A 500 Wh portable power station stores 500 ÷ 1,000 = 0.5 kWh. A 2,400 Wh battery equals 2.4 kWh. Because your utility bills in kilowatt-hours, converting Wh to kWh tells you exactly how much a full charge adds to your electricity meter and its running cost.
Wh to kWh Formula
A kilowatt-hour is simply 1,000 watt-hours — the same unit at a larger scale. One kWh is the energy of a 1,000 W appliance running for one hour. Dividing by 1,000 shifts the decimal three places, so 750 Wh becomes 0.75 kWh.
Wh to kWh Conversion Table
| Watt-hours | Kilowatt-hours | Typical example |
|---|---|---|
| 100 Wh | 0.1 kWh | Small drone battery |
| 250 Wh | 0.25 kWh | E-bike battery |
| 500 Wh | 0.5 kWh | Portable power station |
| 1,000 Wh | 1 kWh | 1,000 W device for 1 hour |
| 2,400 Wh | 2.4 kWh | Solar generator |
| 5,000 Wh | 5 kWh | Home battery module |
| 10,000 Wh | 10 kWh | Whole-home battery |
From Portable Gear to Home Grid Storage
Watt-hours (Wh) are used for portable electronics and e-bikes, while Kilowatt-hours (kWh) are used for home battery systems and utility grids. Because the conversion is just a factor of 1,000, moving the decimal point three places scales your thinking from "backpack" to "basement":
| Battery System | Capacity in Watt-Hours (Wh) | Capacity in Kilowatt-Hours (kWh) |
|---|---|---|
| Large Laptop Battery | 99 Wh | 0.099 kWh |
| Portable Solar Generator (e.g., Bluetti EB55) | 537 Wh | 0.537 kWh |
| Off-Grid Server Rack Battery (e.g., EG4) | 5,120 Wh | 5.12 kWh |
| Electric Vehicle (e.g., Tesla Model 3 LR) | 82,000 Wh | 82.0 kWh |
If your home uses 30 kWh per day, you can immediately see that a 500 Wh (0.5 kWh) portable power station will barely run your house for 24 minutes, while an EV battery (82 kWh) could power it for almost 3 days.
Frequently Asked Questions
How do I convert Wh to kWh?
Divide the watt-hours by 1,000: kWh = Wh ÷ 1,000. For example, 500 Wh ÷ 1,000 = 0.5 kWh. A kilowatt-hour is 1,000 watt-hours, so you just move the decimal three places left.
How many kWh is 500 Wh?
500 Wh equals 0.5 kWh (500 ÷ 1,000). At 15¢ per kWh, recharging it costs roughly 7.5¢.
Is 1,000 Wh the same as 1 kWh?
Yes. The prefix "kilo" means one thousand, so 1,000 Wh = 1 kWh exactly.
Why convert watt-hours to kilowatt-hours?
Electricity is billed in kilowatt-hours, but batteries and appliances are often rated in watt-hours. Converting to kWh lets you compare against your bill and estimate running cost — pair it with our watts to kWh tool.
My portable power station says 1500Wh. How many kWh is that?
Divide by 1,000 to convert to kilowatt-hours. A 1500 Wh power station holds 1.5 kWh of energy. This is enough to run a 1,000 Watt appliance for 1.5 hours.