Ohm's Law Calculator
Ohm's Law Calculator
Enter any two of the three parameters (U, I, R) - the third will be calculated automatically.
What is Ohm's Law?
Ohm's Law states that the current through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance.
Ohm's Law Formula:
U = I × R
- U = Voltage (Volts)
- I = Current (Amperes)
- R = Resistance (Ohms)
Applications:
- Circuit design and analysis
- Electrical troubleshooting
- Power calculations
- Component selection
Frequently Asked Questions
What is Ohm's law formula?
U = I × R, where U is voltage (V), I is current (A), R is resistance (Ω).
What can be calculated with this calculator?
Any of the three parameters if the other two are known.
What units should I use for input values?
U in volts (V), I in amperes (A), R in ohms (Ω).
Can I calculate power using Ohm's law?
Yes, power P = U × I = I²R = U²/R. You can derive power from any two known values.