Runs locally
Ohm's Law
Leave one of volts, amps or ohms empty.
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V = I × R. Provide any two values.
About this tool
Find voltage, current or resistance from the other two values. Leave the unknown field empty and the calculator applies V = I × R.
How to use it
- 01
Enter two of the three values: volts, amps or ohms.
- 02
Leave the unknown value empty.
- 03
Read the calculated value.
FAQ
Frequently asked questions
How do I find resistance?
Enter the voltage and the current and leave ohms empty; the tool returns R = V / I.
Which units are used?
Volts for voltage, amperes for current and ohms for resistance.