The watt is named after James Watt, an 18th-century Scottish inventor. The watt (symbol: W) is a unit of power. Power units represent power physics, which is the rate at which energy is used-up, either transformed or transferred from its source to elsewhere, by various ways within the nature of physics. Watt : The watt is a unit for power, is one of SI Units. Type in your own numbers in the form to convert the units! Sometimes it is used to get a result in Watt hours (Wh), so if you know how many Joules per second, you need to divide by 3600 (60 minutes x 60 seconds) to get the Watt hours. 1 watt is equal to 1 joule/second. One joule per second is equal to 0.001341022 horsepower. In SI base units, the watt is described as kg⋅m ⋅s . Power units. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. Joules to watts calculation formula. The unit symbol for watt is W, defined as one joule per second, measures the rate of energy conversion or transfer. You can calculate watts from joules and seconds, but you can't convert joules to watts, since joule and watt units represent different quantities. 9 Joules per second = 9 Watts: 1000 Joules per second = 1000 Watts: 1000000 Joules per second = 1000000 Watts: Embed this unit converter in your page or … Note that rounding errors may occur, so always check the results. Its name is in honor of the Scottish engineer James Watt, the eighteenth-century developer of the steam engine. Note that rounding errors may occur, so always check the results. Our Joules to Watts converter also supports conversion from KiloJoules (kJ) and MegaJoules (mJ) per second, per minute or per hour to MilliWatts (mW), Watts (W), KiloWatts (KW), and MegaWatts (MW). Convert power of joule per second (J/s) and watts (W) units in reverse from watts into joules per second. ›› Quick conversion chart of joules per second to watt. 1 Joules Per Second to common power units; 1 J/s = 1 watts (W) 1 J/s = 0.001 kilowatts (kW) 1 J/s = 1 volt ampere (VA) 1 J/s = 0.001341022089595 horsepower (hp) 1 J/s = 1 joules per second (J/s) 1 J/s = 0.00094781712031332 btu per second (BTU/s) 1 J/s = 0.0568690272188 btu per minute (BTU/min) 1 J/s = 3.412141633128 btu per hour (BTU/h) 1 J/s = 859.84522785899 calories per hour (cal/h) Use this page to learn how to convert between watts and joules/second. Use this page to learn how to convert between joules/second and watts. 8 Joules = 8 Watt seconds: 500 Joules = 500 Watt seconds: 500000 Joules = 500000 Watt seconds: 9 Joules = 9 Watt seconds: 1000 Joules = 1000 Watt seconds: 1000000 Joules = 1000000 Watt seconds: Embed this unit converter in your page or blog, by copying the following HTML code: convertlive 1 joules per second is equal to 1 watt. 1 joules per second to watt = 1 watt The power P in watts (W) is equal to the energy E in joules (J), divided by the time period t in seconds (s): P (W) = E (J) / t (s) So.