Ohm's Law Calculator (V = I × R)
Free Ohm's Law calculator: find voltage from current and resistance (V = I × R), with power. Instant, accurate, no signup.
Ohm's Law Calculator (V = I × R)
Current IA
Resistance RΩ
Voltage
200V
Current
2A
Resistance
100Ω
Voltage
200V
Power
400W
More about: Ohm's Law Calculator (V = I × R)
What it calculates
The “Ohm's Law Calculator (V = I × R)” calculator computes Voltage in V from 2 parameters: current i (A), resistance r (Ω).
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Current I = 2 A, Resistance R = 100 Ω the result is 200 V (U = I · R).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.