Kilojoules to Watt-Seconds Converter

Enter the energy in kilojoules below to get the value converted to watt-seconds.


Result in Watt-Seconds:

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1 kJ = 1,000 Ws

Do you want to convert watt-seconds to kilojoules?

How to Convert Kilojoules to Watt-Seconds

To convert a measurement in kilojoules to a measurement in watt-seconds, multiply the energy by the following conversion ratio: 1,000 watt-seconds/kilojoule.

Since one kilojoule is equal to 1,000 watt-seconds, you can use this simple formula to convert:

watt-seconds = kilojoules × 1,000

The energy in watt-seconds is equal to the energy in kilojoules multiplied by 1,000.

For example, here's how to convert 5 kilojoules to watt-seconds using the formula above.
watt-seconds = (5 kJ × 1,000) = 5,000 Ws

How Many Watt-Seconds Are in a Kilojoule?

There are 1,000 watt-seconds in a kilojoule, which is why we use this value in the formula above.

1 kJ = 1,000 Ws

Kilojoules and watt-seconds are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Kilojoule?

One kilojoule is equal to 1,000 joules, which is the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for thousands, or 103. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

Learn more about kilojoules.

What Is a Watt-Second?

The watt-second is a measure of electrical energy equal to one watt of power over a one second period. One watt-second is equal to 1/3,600 of a watt-hour or one joule.

Watt-seconds are usually abbreviated as Ws, although the formally adopted expression is W·s. The abbreviation W s is also sometimes used. For example, 1 watt-second can be written as 1 Ws, 1 W·s, or 1 W s.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about watt-seconds.

Kilojoule to Watt-Second Conversion Table

Table showing various kilojoule measurements converted to watt-seconds.
Kilojoules Watt-seconds
0.001 kJ 1 Ws
0.002 kJ 2 Ws
0.003 kJ 3 Ws
0.004 kJ 4 Ws
0.005 kJ 5 Ws
0.006 kJ 6 Ws
0.007 kJ 7 Ws
0.008 kJ 8 Ws
0.009 kJ 9 Ws
0.01 kJ 10 Ws
0.02 kJ 20 Ws
0.03 kJ 30 Ws
0.04 kJ 40 Ws
0.05 kJ 50 Ws
0.06 kJ 60 Ws
0.07 kJ 70 Ws
0.08 kJ 80 Ws
0.09 kJ 90 Ws
0.1 kJ 100 Ws
0.2 kJ 200 Ws
0.3 kJ 300 Ws
0.4 kJ 400 Ws
0.5 kJ 500 Ws
0.6 kJ 600 Ws
0.7 kJ 700 Ws
0.8 kJ 800 Ws
0.9 kJ 900 Ws
1 kJ 1,000 Ws


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

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