Ohm's Law Calculator
Free Ohm's Law calculator to compute current and power from voltage and resistance
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📊 Result Chart
About Ohm's Law Calculator
Ohm's Law Calculator is a free online tool that helps engineers, students, and electronics hobbyists quickly compute voltage, current, resistance, and power relationships. Enter any two parameters to get instant results — an essential companion for circuit analysis and design.
Ohm's Law Calculator in 3 steps
- Enter the voltage value in the "Voltage (V)" field
- Enter the resistance value in the "Resistance (Ω)" field
- Click "Calculate" to get the current and power
Is this tool accurate?
Results are computed with standard, industry-accepted formulas for Voltage and Resistance calculations.
Do I need to download anything?
No, it runs entirely in your browser. No downloads needed.