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General Information, Facts & Tables
[Joule's Law Calculator]

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Joule's Law states that "when a current I is passed through a resistance R, the resulting power P dissipated in the resistance is equal to the square of the current multiplied by the resistance.

See Also: Open Another, Using the Calculators


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P = I2 * R
I = ( P / R )0.5
R = P / I2


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P = Power (watt [W])
I = Current (ampere [A])
R = Resistance (ohms [W])


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Show all available units

P []:


I []:


R []:


Note! Set unit values prior to calculating.