ELECTRICAL / CALCULATOR
Ohm's Law
Find voltage, current or resistance from the other two values.
Input Parameters
Edit the example values. Results update as you type.
Results
- Calculate Voltage
- 24V
Formula
U = I × RSubstitution
U = 2 × 12 = 24 VCalculation Steps
- Rearrange Ohm's Law to isolate U on the left-hand side.
- Substitute SI values from the same branch to obtain the unknown quantity.
Result Explanation
This ideal model assumes constant resistance and nonnegative magnitudes.
Formulas and FAQ
U = I × RWhy must resistance be nonzero when calculating current?
U ÷ R is undefined when R is zero. Actual short-circuit current depends on source and circuit impedance.