Ohm's Law Calculator
Calculate Voltage, Current, Resistance, and Power instantly by entering any two known values.
Calculate Voltage, Current, Resistance, and Power instantly by entering any two known values.
Frequently asked questions
Is Ohm's Law Calculator free to use?
Yes, Ohm's Law Calculator is completely free with no sign-up, usage limits, watermarks or ads gating the result. Just open it and use it.
Is Ohm's Law Calculator safe and private?
Yes. Ohm's Law Calculator runs entirely in your browser — your files and data never leave your device and nothing is uploaded to any server.
Do I need to install anything to use Ohm's Law Calculator?
No installation is required. Ohm's Law Calculator works in any modern web browser on Windows, macOS, Linux, Android and iOS.
How do I use Ohm's Law Calculator?
Calculate Voltage, Current, Resistance, and Power instantly by entering any two known values.. Enter or upload your input, and you'll get instant results you can copy or download.