Home β€Ί βš™οΈ Engineering β€Ί Ohm's Law Calculator
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Ohm's Law Calculator

Calculate voltage, current, resistance, and power for any electrical circuit.

Result
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About the Ohm's Law Calculator

Calculate voltage, current, resistance, and power for any electrical circuit.

Calculate voltage, current, resistance, and power for any electrical circuit. This calculator is completely free β€” no sign-up, no email, no paywalls. Results are estimates; always verify with a qualified professional for high-stakes decisions.

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Frequently Asked Questions

What are SI units?
The International System of Units β€” meters, kilograms, seconds, amperes, etc. Always use SI for scientific calculations.
How do I convert units?
Use conversion factors. 1 HP = 745.7 W. 1 PSI = 6894.76 Pa. 1 ftΒ·lb = 1.35582 NΒ·m.
What safety margins should I apply?
Engineering designs typically use safety factors of 2–10Γ— depending on application and consequences of failure.
Are these calculations suitable for professional use?
For rough estimation only. Professional engineering calculations require certified software and a licensed engineer sign-off.

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πŸ“‹ How to Use

  1. Enter your values in the fields above
  2. Click Calculate or press Enter
  3. View your instant results and chart
  4. Export to CSV or share your results

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