Electrical

Ohms Law Calculator

Solve for voltage, current, or resistance by entering the other two values in Ohm's law.

Preparing Ohms Law Calculator

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Input

Choose the electrical value you want to solve for, then enter the other two known values. This tool shows the result instantly without step-by-step output.

Input summary

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How to use Ohms Law Calculator

Select the unknown you need, provide the two known circuit values, and the calculator will solve the missing part of Ohm's law.

What this calculator is for

This calculator is for electronics study, troubleshooting, and quick circuit checks when one of the three core electrical quantities is unknown.

Tips

Be sure the current, voltage, and resistance all describe the same point in the same circuit before solving.
If the result seems unrealistic, check your units first because amps, volts, and ohms are easy to misread when copying labels.