Current Calculator (I = V / R)
Calculate electric current from voltage and resistance using Ohm's Law (I = V / R). Free online calculator with power output.
Current Calculator (I = V / R)
Voltage UV
Resistance RΩ
Current
0.12A
Voltage
12V
Resistance
100Ω
Current
0,12A
Power
1,44W
More about: Current Calculator (I = V / R)
What it calculates
The “Current Calculator (I = V / R)” calculator computes Current in A from 2 parameters: voltage u (V), resistance r (Ω).
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Voltage U = 12 V, Resistance R = 100 Ω the result is 0.12 A (I = U / 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.