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 draw
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 current i and resistance r — each field above is adjustable with a slider.
- Voltage (V) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Ohm's Law Calculator (V = I × R) calculated?
The Ohm's Law Calculator (V = I × R) calculator computes Voltage (in V) from current i, resistance r. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Ohm's Law Calculator (V = I × R) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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