Power Calculator Calculate Volts, Amps, ['watts'], or Ohms Give any 2 values. The other 2 are calculated. Input Unit Calculated Voltage Volts V Intensity Amps A Power Watts W Resistance Ω Ohms Ω

 Details Voltage [V] The measure of the power differental between two points. It is the electromotive force. This is measured in volts [V]. Current Iintensity [I] The flow of electric charge across a surface. This is measured in amps [A]. Power [P] The rate of energy transfer. This is measured in ['watts'] [W]. Resistance [R] The rate of energy transfer. This is measured in ohms [Ω].
 Formulas To find Known Formula Volts Amps [I] Resistance Ω V = I x R Volts Watts [P] Amps [I] V = P⁄I Volts Watts [P] Resistance Ω √ P x R Amps [I] Volts Resistance Ω I = V⁄R Amps [I] Watts [P] Volts I = P⁄ V Amps [I] Watts [P] Resistance Ω I = √ P⁄R Watts [P] Volts Amps [I] P = V x I Watts [P] Volts Resistance Ω P = V2⁄R Watts [P] Amps [I] Resistance Ω P = I2 x R Resistance Ω Volts Amps [I] R = V⁄I Resistance Ω Volts Watts [P] R = V2⁄P Resistance Ω Watts [P] Amps [I] R = P⁄I2