Ohm's Law Calculator
Calculate any electrical value using Ohm's Law: V = I × R.
- Free Online Tool
- Instant Results
- Mobile Friendly
- No Installation
- Secure & Private
Understanding This Calculator
Ohm's Law Formulas
Fundamental relationship in electrical circuits.
V = I × R
- V: Voltage (Volts)
- I: Current (Amperes)
- R: Resistance (Ohms)
Example 1
Current: 2A, Resistance: 5Ω
- V = 2 × 5 = 10 Volts
Example 2
Voltage: 120V, Resistance: 240Ω
- I = 120 / 240 = 0.5 Amps
How to Use
- Enter any two values.
- Leave blank the value you want to calculate.
Frequently Asked Questions
How do I use the Ohm's Law Calculator?
Enter your values in the input fields, and the result will appear instantly.
Is this calculator free to use?
Yes, this calculator is 100% free and does not require any registration or subscription.
Is it mobile-friendly?
Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.