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joule Unit Converter
Background:
joule [J]

The SI-derived unit for energy, work, and heat, named after British physicist James Prescott Joule. 1 joule = 1 newton-meter = 1 watt-second. Widely used in physics, engineering, and nutrition (e.g., food energy is often labeled in kilojoules, kJ). Universally adopted and part of China’s statutory measurement system.

watt-second [Ws]

The SI-derived unit for energy, work, and heat, named after British physicist James Prescott Joule. 1 joule = 1 newton-meter = 1 watt-second. Widely used in physics, engineering, and nutrition (e.g., food energy is often labeled in kilojoules, kJ). Universally adopted and part of China’s statutory measurement system.

Convert joule [J] to watt-second [Ws]
joule [J]watt-second [Ws]
1 J-
2 J-
3 J-
4 J-
5 J-
10 J-
20 J-
30 J-
joule [J]watt-second [Ws]
40 J-
50 J-
100 J-
200 J-
300 J-
400 J-
500 J-
1000 J-