Convert Watts to Kilowatts

Enter the power in watts below to get the value converted to kilowatts.

Results in Kilowatts:
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1 W = 0.001 kW
Do you want to convert kilowatts to watts?

How to Convert Watts to Kilowatts

To convert a watt measurement to a kilowatt measurement, multiply the power by the conversion ratio. One watt is equal to 0.001 kilowatts, so use this simple formula to convert:

kilowatts = watts × 0.001

The power in kilowatts is equal to the watts multiplied by 0.001.

For example, here's how to convert 5 watts to kilowatts using the formula above.
5 W = (5 × 0.001) = 0.005 kW

Watts and kilowatts are both units used to measure power. Keep reading to learn more about each unit of measure.


One watt is the power equal to the rate of energy of one joule per second in an electrical circuit. One watt is also equal to the power produced in a circuit with a voltage potential of one volt with a current of one amp.

The watt is the SI derived unit for power in the metric system. Watts can be abbreviated as W, for example 1 watt can be written as 1 W.

Watt's Law states the relationship between power, current, and voltage. Using Watt's Law, it's possible to express the power in watts as an expression using current and voltage.

PW = IA × VV

The power in watts is equal to the current in amperes times the potential difference in volts.

Combining this with Ohm's Law, it's also possible to express the power in watts using resistance in addition to volts and amps.


One kilowatt is the power equal to 1,000 watts, or the energy consumption at a rate of 1,000 joules per second.

The kilowatt is a multiple of the watt, which is the SI derived unit for power. In the metric system, "kilo" is the prefix for 103. Kilowatts can be abbreviated as kW, for example 1 kilowatt can be written as 1 kW.

Watt Measurements and Equivalent Kilowatt Conversions

Common watt values converted to the equivalent kilowatt value
Watts Kilowatts
1 W 0.001 kW
2 W 0.002 kW
3 W 0.003 kW
4 W 0.004 kW
5 W 0.005 kW
6 W 0.006 kW
7 W 0.007 kW
8 W 0.008 kW
9 W 0.009 kW
10 W 0.01 kW
11 W 0.011 kW
12 W 0.012 kW
13 W 0.013 kW
14 W 0.014 kW
15 W 0.015 kW
16 W 0.016 kW
17 W 0.017 kW
18 W 0.018 kW
19 W 0.019 kW
20 W 0.02 kW
21 W 0.021 kW
22 W 0.022 kW
23 W 0.023 kW
24 W 0.024 kW
25 W 0.025 kW
26 W 0.026 kW
27 W 0.027 kW
28 W 0.028 kW
29 W 0.029 kW
30 W 0.03 kW
31 W 0.031 kW
32 W 0.032 kW
33 W 0.033 kW
34 W 0.034 kW
35 W 0.035 kW
36 W 0.036 kW
37 W 0.037 kW
38 W 0.038 kW
39 W 0.039 kW
40 W 0.04 kW

More Watt Power Conversions

SI Units
Convert to Microwatts
1 W is equal to 1,000,000 microwatts
Convert to Milliwatts
1 W is equal to 1,000 milliwatts
Convert to Megawatts
1 W is equal to 1.0E-6 megawatts
US Customary & Imperial Units
Convert to Mechanical Horsepower
1 W is equal to 0.001341 mechanical horsepower
Convert to Electric Horsepower
1 W is equal to 0.00134 electric horsepower
Convert to Btu Per Hour
1 W is equal to 3.412142 btu per hour
Other Units
Convert to Kilocalories Per Hour
1 W is equal to 0.860421 kilocalories per hour

Unit of Measurement Conversion Made Easy!

There are thousands of units of measure in use across the globe, and converting from one to another can be very difficult since each conversion requires a different formula to derive the result. Our unit of measurement conversion tools are meant to be dead easy. We break the mold of the typical dry and complicated experience. In addition to converting from one measurement to another, we provide the formula so you can see how the conversion is done, use it on you’re own calculator if you need to!

Convert units of length, weight, volume, and area between imperial and metric measures

Understanding the Metric System

The metric system makes it relatively easy to convert from one metric unit to another metric unit. The metric system uses a base unit, think meters or grams, and a prefix such as kilo or milli. The prefixes differ from the base units by differing powers of 10. So to convert within the metric system it’s usually a matter of multiplying or dividing by one of the powers of 10.

Here is a list of some of the common metric prefixes:

  • “kilo” – 1,000x larger
  • “hecto” – 100x larger
  • “deca” – 10x larger
  • “deci” – 10x smaller
  • “centi” – 100x smaller
  • “milli” – 1,000x smaller

There is a helpful mnemonic for remembering the prefixes: “King Henry Died Until Drinking Chocolate Milk.”
The u in Until refers to the base unit.