What does the Ohms Law Calculator work out?

Voltage, current, resistance and power from any two. It is one of the Everyday & Tech tools on Mondo Knows.

How is the Ohms Law Calculator calculated?

The maths is short enough to check by hand: V = I x R, P = V x I.

Do I need to sign up, and is my data stored?

No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

Mondo Knows Tools

Ohms Law Calculator

Voltage, current, resistance and power from any two. Use the free ohms law calculator below to get an instant answer, with the formula shown so you can check the maths and trust the result. Free, private, and no sign-up.

Voltage

Current

Resistance

ohm

Mondo says

Power

36 W

Voltage12 V

Current3 A

Resistance4 ohm

The formula

V = I x R, P = V x I

Ohms Law Calculator: common questions

What does the Ohms Law Calculator work out?: Voltage, current, resistance and power from any two. It is one of the Everyday & Tech tools on Mondo Knows.
How is the Ohms Law Calculator calculated?: The maths is short enough to check by hand: V = I x R, P = V x I.
Do I need to sign up, and is my data stored?: No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

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Facts that connect to the ohms law calculator

Short, sourced facts that point back to this tool.

An electric eel can generate shocks exceeding 600 voltsThree specialized electric organs fill most of an electric eel body.Electric catfish discharge electricity using specialized skin organsAn electric catfish can discharge up to 350 volts when disturbed.Superconductors carry electricity with zero energy lossCooled below a critical temperature certain materials conduct electric current perfectly Molten iron convection in outer core creates Earth magnetic shieldCirculating liquid metal acts as a giant geodynamo protecting Earth from solar radiation

Estimates for general guidance only. This is not financial, medical or legal advice. Everything runs in your browser and nothing you type is stored.