Ohm's Law Calculator

Find voltage, current, resistance, and power from any two known electrical values.

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Reading known values

Solving Ohm equations

Calculating power

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Fast electronics calculations help validate a circuit idea before breadboarding.

The tool calculates key parameters locally in the browser and produces a clear report.

For production design, also consider component tolerance, temperature, and the load model.

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Executed in Browser

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Accepted Formats & Rules

✓ Runs locally in the browser without sending data to a server.

✓ Shows practical circuit parameters, not just a formula.

✓ Useful for breadboarding, repair, and learning.

• Do you need to calculate voltage, current, resistance, or power using Ohm's Law?
• Are you designing a circuit and need to find the correct resistance?
• Need to check the power dissipation of a component to prevent overheating?