How it works
Fill in the 2 fields above and Ohm’s Law Calculator calculates the result instantly, recalculating as you change any value. It applies the formula V = I × R, P = V × I. The math runs locally in your browser — nothing is sent to a server.
Formula
V = I × R, P = V × IExamples
- Voltage 12 V, Current 2 A → Resistance: 6 Ω
Frequently asked questions
How do I use the Ohm’s Law Calculator?
Enter your values in the 2 input fields and the result is calculated automatically as you type. Change any value to see the numbers update instantly.
What formula does the Ohm’s Law Calculator use?
It uses V = I × R, P = V × I. The calculation is performed in your browser using standard, well-established math for accurate results.
Is my data private?
Yes. The Ohm’s Law Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the Ohm’s Law Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on science and the rest of the platform, you can use it as often as you like.
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