Ohm’s Law Calculator – P, I, V, R Calculator
Ohm’s Law Calculator – Power, Current, Voltage & Resistance Calculator
Below are the four Electrical calculators based on Ohm’s Law with Electrical Formulas and Equations of Power, Current, Voltage and Resistance in AC and DC Single phase & Three Phase circuit.
Enter the known values and select a conversion from the buttons below and click on Calculate. result will display the desire values which you want to calculate.
Power Calculator
Electrical Power Formulas
Electrical Power formulas in DC Circuits
- P = VxI
- P = I2R
- P = V2/R
Electrical Power formulas in Single Phase AC Circuits
- P = VxI Cosθ
- P = I2 x R Cosθ
- P = (V2/R) Cosθ
Electrical Power formulas in Three Phase AC Circuits
- P =√3 x VLxIL Cosθ
- P =3 x VPxIP Cosθ
- P =3 I2 x R Cosθ
- P =3 (V2/R) x R Cosθ
Where
- I = Current in Amperes (A)
- V = Voltage in Volts (V)
- P = Power in Watts (W)
- R = Resistance in Ohm (Ω)
Related Post: Power, Voltage, Current and Resistance Calculator
Current Calculator
Electrical Current Formulas
Electrical Current Formulas in DC Circuit
- I=V/R
- I = P/V
- I = √P/R
Electrical Current Formulas in Single Phase AC Circuit
- I = P / (V x Cosθ)
- I = (V/Z)…Where Z = impedance = Resistance of AC Circuits
Electrical Current Formulas in Three Phase AC Circuit
I = P / √3xVxCosθ
Where
- I = Current in Amperes (A)
- V = Voltage in Volts (V)
- P = Power in Watts (W)
- R = Resistance in Ohm (Ω)
Related Calculator: RMS Voltage Calculator – From Average Value, Peak & Peak to Peak Value
Voltage Calculator
Voltage or Electrical Potential Formulas
Electrical Potential or Voltage Formula in DC Circuits
- V = I x R
- V = P / I
- V = √ (P x R)
Voltage or Electrical Potential Formulas in Single Phase AC Circuits
- V = P/(IxCosθ)
- V = I / Z… Where Z = impedance = Resistance of AC Circuits
Where
- I = Current in Amperes (A)
- V = Voltage in Volts (V)
- P = Power in Watts(W)
- P = Power in Watts(W)
- R = Resistance in Ohm (Ω)
Related Calculator: Standard Resistor Closest Value Calculator
Resistance Calculator
Electrical Resistance Formulas
- R = V/I
- R = P/I2
- R = V2/P
Where
- I = Current in Amperes (A)
- V = Voltage in Volts (V)
- P = Power in Watts (W)
- R = Resistance in Ohm (Ω)
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