Engineering

Ohm's Law Calculator

Calculate voltage from current and resistance.

Ohm's Law Calculator

Result
Ready

    Guide

    Ohm's Law Calculator basics

    Calculate voltage when current and resistance are known.

    Formula

    How the calculation works

    Ohm's lawV = I x R

    Example

    Example calculation

    2 A x 12 ohm

    24 V

    Notes

    Assumptions

    • This version solves for voltage only.

    FAQ

    Ohm's Law Calculator FAQ

    What is the Ohm's Law Calculator for?

    It uses the fields on this page and applies the formula shown below the result. Check the assumptions before using the number outside the page.

    Can I use decimals?

    Yes. Decimal inputs are supported unless the field represents a count.

    How should I use the result?

    Treat it as a calculator result, not a full plan. Round it or adjust it when the real situation calls for it.

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    Disclaimer. Use this result as a check or starting point. For finance, health, engineering, or purchasing decisions, verify the numbers before acting on them.