Joules to Watts | Convert J to W

Convert Joules to Watts for free with our J to W online calculator

How To Convert Joules to Watts

To convert joules to watts, you need to use the following J to W formula:

Watts (W) = Joules (J) / Time (seconds)

For example, if a light bulb uses 10 Joules of energy (electrical) and stays lit for 2 seconds, you can find the power (wattage) of the bulb:

Power = 10 Joules / 2 seconds = 5 Watts

Joules to Watts Conversion Examples

Example 1: Convert 500 joules to watts

  • Input: 500 joules
  • Result: 500 watts

Example 2: Convert 10,000 joules to watts

  • Input: 10,000 joules
  • Result: 10,000 watts

Related: Joules to Kilojoules