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Ohm's Law Calculator

Calculate Voltage, Current, Resistance, or Power given any two known values.

Known Values

I (Current)

R (Resistance)

Voltage (V)

1,000 V

Current (I)

10 A

Resistance (R)

100 Ω

Power (P)

10,000 W

Ohm's Law Formula Wheel

V = I × R

I = V ÷ R

R = V ÷ I

P = V × I

P = I² × R

P = V² ÷ R

V = √(P × R)

I = √(P ÷ R)

R = V² ÷ P

I = P ÷ V