Kilowatt to Joule/Second Converter

Power Converter

22 units available

Decimals:

From

To

1,000

1 kW = 1,000 J/s

Formula:

J/s = kW × 1,000

With your value: 1 kW = 1,000 J/s

How big is that?

Everyday references on a logarithmic scale, all expressed in kilowatt so you can sanity-check the result.

LED bulb (1/1.1e+2 your value)0.00900 kW

Laptop (1/15 your value)0.0650 kW

Microwave oven (1.0× your value)1.00 kW

Your value1.00 kW

Electric kettle (3.0× your value)3.00 kW

Family car engine (90× your value)90.0 kW

Other Kilowatt to Joule/Second conversions

2 kW to J/s 3 kW to J/s 4 kW to J/s 5 kW to J/s 6 kW to J/s 7 kW to J/s 8 kW to J/s

Kilowatt to Joule/Second Conversion Table

Kilowatt (kW)	Joule/Second (J/s)
0.5	500
1	1,000
2	2,000
5	5,000
10	10,000
15	15,000
20	20,000
25	25,000
50	50,000
100	100,000
250	250,000
500	500,000
1000	1,000,000

Joule/Second to Kilowatt Conversion Table

Joule/Second (J/s)	Kilowatt (kW)
0.5	0.0005
1	0.001
2	0.002
5	0.005
10	0.01
15	0.015
20	0.02
25	0.025
50	0.05
100	0.1
250	0.25
500	0.5
1000	1

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Kilowatt (kW)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Joule/Second (J/s)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Kilowatt to Joule/Second

To convert from Kilowatt (kW) to Joule/Second (J/s), multiply the value by 1,000.

Formula: J/s = kW × 1,000

Reverse: kW = J/s × 0.001

Step-by-Step Example

Start with your value in Kilowatt. For example: 5 kW
Multiply by the conversion factor: 5 x 1,000
The result is: 5,000 J/s

About Kilowatt

The kilowatt (kW) is a unit of power. One kilowatt equals 1000 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

About Joule/Second

The joule/second (J/s) is a unit of power. One joule/second equals 1 watt. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

Frequently Asked Questions

How many Joule/Second are in 1 Kilowatt?

There are exactly 1,000 Joule/Second in 1 Kilowatt. This means the conversion factor from Kilowatt to Joule/Second is 1,000.

What is the formula to convert Kilowatt to Joule/Second?

The formula to convert Kilowatt to Joule/Second is: J/s = kW × 1,000. For example, to convert 10 Kilowatt to Joule/Second, you would multiply 10 by 1,000.

What is a Kilowatt?