Science Calculators
Ohm's Law Calculator
Choose which value to solve for, then enter the other two to calculate voltage, current, or resistance using Ohm's law.
12.000 V
Power: 24.000 W
How to use this tool
- 1Choose which value to solve for.
- 2Enter the other two known values.
- 3See the result and calculated power.
Frequently asked questions
What is Ohm's law?+
Ohm's law states V = I × R — voltage equals current times resistance — the fundamental relationship in basic circuit analysis.