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Convert kilojoule to watt second

Here you can quickly calculate how many watt second fit in one kilojoule.
write a number and we convert instantly
swap direction → TWh

- scroll: formula · table · questions -

  • 1 kJ = 1000 Ws
  • 1 Ws = 0.001 kJ

Example: kilojoule to watt second

  • 1 kilojoule = 1000 watt second

Kilojoule to watt second conversion table

kilojoule watt second
1 1000
2 2000
5 5000
10 10000
20 20000
50 50000
100 100000

Kilojoule to watt second formula

To convert kilojoule to watt second, multiply by 1000.

1 kJ = 1000 Ws
Example: 1 kilojoule = 1000 watt second

Common energy conversion mistakes

  • The relationship is exact: 1 kWh = 3.6 MJ (3,600 kJ, because an hour has 3,600 seconds). The common slip is dividing when you should multiply: 10 kWh is 36 MJ, not 2.8. Remember the direction: kWh → MJ means times 3.6.

Quick kilojoule and watt second conversion quiz

Score: 0

250 kilojoule equals 250 000 watt second.

Correct answer: 250 kilojoule = 250 000 watt second.

241 watt second equals 0.145 kilojoule.

Correct answer: 241 watt second = 0.241 kilojoule.

201 kilojoule equals 302 000 watt second.

Correct answer: 201 kilojoule = 201 000 watt second.

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