Convert j to watt second

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Joule

The joule (/dʒaʊ,dʒuːljawl, jool; symbol: J) is a derived unit of energy in the International System of Units. It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of the force's motion through a distance of one metre (1 newton metre or N⋅m). It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889). 


Watt-Second

A watt-second (symbol: W·s) is a unit of energy equal to exactly one joule, defined as the energy delivered by one watt of power sustained for one second. It is an alternative expression of the joule that makes the power-time relationship explicit, and the two are used interchangeably in physics and engineering. The watt-second is sometimes encountered in capacitor and flash photography energy specifications. 


Joule to Watt-Second conversion table
JouleWatt-SecondWatt-SecondJoule
1111
2222
3333
5555
10101010
20202020
25252525
50505050
100100100100
250250250250
500500500500
1000100010001000
How to convert Joule to Watt-Second

1 J = 1 W*s. To convert any value, multiply it by 1. For example, 25 J = 25 W*s.

Frequently asked questions
How many W*s are there in one J?
One J is equal to 1 W*s.
How do you convert Joule to Watt-Second?
Multiply the value in Joule by 1 to get the result in Watt-Second.
How much is 25 J in W*s?
25 J is equal to 25 W*s.
How do you convert Watt-Second back to Joule?
Divide by the same factor: multiply the value in Watt-Second by 1 to get Joule.

Most common energy unit conversions