What Is the Watts to Kilowatts Calculator?
This tool converts electrical power expressed in watts (W) into kilowatts (kW). Both are SI units of power, where one kilowatt equals exactly 1,000 watts. The conversion is universal and applies anywhere in the world — whether you are reading an appliance label, sizing a solar panel array, or estimating energy bills.
How to Use It
Enter the power value in watts and the calculator instantly shows the equivalent in kilowatts. For example, a 1,500 W heater equals 1.5 kW. There are no other settings — the relationship between watts and kilowatts is fixed.
The Formula Explained
The conversion uses the simple relation:
$$\text{kW} = \frac{\text{W}}{1000}$$
Because the prefix "kilo" means one thousand, every kilowatt contains 1,000 watts. To go the other direction, multiply kilowatts by 1,000 to get watts.
Worked Example
Suppose a microwave is rated at 1,200 W. Dividing by 1,000 gives $$1{,}200 / 1{,}000 = 1.2 \text{ kW}.$$ So the microwave draws 1.2 kilowatts of power when operating at full load.
FAQ
How many watts are in a kilowatt? Exactly 1,000 watts equal 1 kilowatt.
Is kW the same as kWh? No. A kilowatt (kW) measures power — the rate of energy use. A kilowatt-hour (kWh) measures energy — power used over time. A 1 kW device running for 1 hour uses 1 kWh.
How do I convert kilowatts back to watts? Multiply the kilowatt value by 1,000. For example, \(2.5 \text{ kW} \times 1{,}000 = 2{,}500 \text{ W}\).
