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Home » Analyzing Electric Circuits » Ohm’s Law (P,I,V,R) Calculator

# Ohm’s Law (P,I,V,R) Calculator

## Ohm’s Law (P,I,V,R) 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.

Calculate Power (W) in Watts using Ohm’s Law:
Enter any two values of: V, I, and R
 V: I: R:

Output
 Watts (W):
(1)
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)
Calculate Current (I) in Amperes using Ohm’s Law:
Enter any two values of: V, W, and R
 V: W: R: 3-Phase

Output
 Amperes (A):
(2)  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)
Calculate Voltage (V) in Volts using Ohm’s Law:

Enter any two values of: W, I, and R
 W: I: R:

Output
 Volts (V):
(3)
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)
Calculate Resistance (R) in Ohms (Ω) using Ohm’s Law:
Enter any two values of: V, I, and W
 V: I: W:

Output
 R (Ohms = Ω):
(4)
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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