OHM’S LAW

Ohm’s Law Calculator is a simple and powerful tool to calculate Voltage (V), Current (I), Resistance (R), or Power (P) in an electrical circuit. Just enter any two known values, press Calculate, and the tool will instantly solve for the remaining values.

What is Ohm’s Law?

Ohm’s Law is a fundamental principle in electrical engineering that relates voltage, current, and resistance in a circuit. It is expressed as:

• Voltage (V) = Current (I) × Resistance (R)
• Current (I) = Voltage (V) ÷ Resistance (R)
• Resistance (R) = Voltage (V) ÷ Current (I)
• Power (P) = Voltage (V) × Current (I)

This relationship makes it easy to analyze electrical circuits and determine how components behave under different conditions.

How to Use the Calculator

1. Enter any two values (Voltage, Current, Resistance, or Power).
2. Choose the correct units (Volts, Amps, Ohms, Watts, or their multiples like mA and kΩ).
3. Click Calculate.
4. The calculator will display the missing values and highlight them with an orange border.

Example Calculations

• If you enter Voltage = 12V and Resistance = 6Ω, the calculator will find:
  • Current = 2A
  • Power = 24W
• If you enter Current = 0.5A and Power = 10W, the calculator will find:
  • Voltage = 20V
  • Resistance = 40Ω

Why Use This Tool?

• Fast and accurate results
• Handles multiple units (Amps, mA, Ohms, kΩ)
• Useful for students, engineers, and hobbyists
• Works on both desktop and mobile devices

Applications of Ohm’s Law

• Designing and troubleshooting electrical circuits
• Calculating safe resistor values in electronics projects
• Checking power ratings in devices
• Understanding the relationship between voltage, current, and resistance

Frequently Asked Questions (FAQ)

Q1. What is Ohm’s Law used for?
Ohm’s Law is used to calculate the relationship between voltage, current, and resistance in an electrical circuit.

Q2. Can I calculate power with Ohm’s Law?
Yes. Power can be calculated using P = V × I once you know voltage and current.

Q3. What units does the calculator support?
The calculator supports Volts (V), Amps (A), milliamps (mA), Ohms (Ω), kilo-ohms (kΩ), and Watts (W).

Q4. Who can use this tool?
This tool is helpful for electrical engineers, students, electronics hobbyists, and technicians working on circuit design and troubleshooting.