Ohms Law Voltage Calculator (V=IR)

Compute voltage V from current I and resistance R using Ohms law V=IR. It also derives power P=I squared R and shows a clear circuit diagram.

Input

Enter current and resistance to compute voltage using Ohms law V=IR. Power is also calculated.

Current I

Current flowing in the circuit in amperes

Resistance R

Resistance of the circuit in ohms

Voltage V

200V

V = 2 A times 100 Ω = 200 V

Power P

400 W

Current I

2 A

Resistance R

100 Ω

Voltage is found from Ohms law V = I R. Power is P = I squared R = V I.

Voltage V is the product of current I and resistance R, given by V = I times R (Ohms law).
Power P is computed as P = I squared times R, which equals P = V times I.
Current is in amperes (A), resistance in ohms (Ω), voltage in volts (V), and power in watts (W).
Input values cannot be negative. Enter current and resistance as numbers of 0 or greater.

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