Ohm's Law Calculator
Total Voltage (V)
0 V
Total Current (I)
0 A
Total Resistance (R)
0 Ω
| # | Voltage (V) | Current (A) | Resistance (Ω) | Calculation |
|---|
⚡ Ohm’s Law Calculator – Instantly Solve Voltage, Current, and Resistance
Focus Keywords: Ohm’s Law Calculator, Ohm’s Law, Voltage Calculator, Current Calculator, Resistance Calculator, Electrical Calculator, Online Ohm’s Law Tool, V = IR Calculator, Electric Formula Calculator, Ohm’s Law Equation
🔍 What Is Ohm’s Law?
Ohm’s Law is a fundamental principle in electrical engineering and electronics. It defines the relationship between voltage (V), current (I), and resistance (R) in an electric circuit.
The law is mathematically represented as:
V = I × R
Where:
V is Voltage (in volts)
I is Current (in amperes)
R is Resistance (in ohms)
With this simple formula, you can calculate any one of the three values if the other two are known.
🧠 Why Use an Ohm’s Law Calculator?
Doing calculations manually can be time-consuming and error-prone. Our Ohm’s Law Calculator is designed to help:
Electricians
Students
Engineers
DIY hobbyists
Technicians
With a quick input of any two known values, the calculator will instantly give you the missing third value—accurately and in seconds.
⚙️ How the Ohm’s Law Calculator Works
Our online Ohm’s Law Calculator is incredibly simple to use. Just follow these three steps:
Choose what to calculate: Voltage (V), Current (I), or Resistance (R).
Enter the known values: For example, if you’re calculating Voltage, input Current and Resistance.
Get instant results: The calculator automatically applies the Ohm’s Law formula and gives you the answer.
✅ Supported Calculations:
Voltage (V) = Current (I) × Resistance (R)
Current (I) = Voltage (V) ÷ Resistance (R)
Resistance (R) = Voltage (V) ÷ Current (I)
📱 Mobile-Friendly Online Tool
Our Ohm’s Law Calculator is fully responsive. Whether you’re using a desktop, tablet, or smartphone, it adjusts perfectly to any screen size. Use it at your workbench, on-site, or even during an exam!
🧪 Practical Applications of Ohm’s Law
Understanding and calculating Ohm’s Law is critical in many real-life scenarios:
Designing electrical circuits
Troubleshooting faulty appliances
Determining correct resistor values
Calculating power consumption
Measuring safety levels in live circuits
Whether you’re installing LED lights or building a circuit board, knowing how voltage, current, and resistance interact is key.
🔒 Safe, Fast, and Accurate
No downloads required
100% free and browser-based
Instant calculation results
Validates input and avoids errors
Our Ohm’s Law Calculator is built with real-time validation, so it alerts you if any input is missing or invalid (like negative numbers).
📊 Example Calculations
Here are a few examples of how the calculator works in real-world scenarios:
Example 1: Finding Voltage
Current (I): 2 A
Resistance (R): 10 Ω
Result: Voltage (V) = 2 × 10 = 20 V
Example 2: Finding Resistance
Voltage (V): 12 V
Current (I): 4 A
Result: Resistance (R) = 12 ÷ 4 = 3 Ω
Example 3: Finding Current
Voltage (V): 24 V
Resistance (R): 6 Ω
Result: Current (I) = 24 ÷ 6 = 4 A
🛠️ Additional Features Coming Soon
We’re working to expand this tool with extra features like:
Power Calculation (P = V × I)
Series & Parallel Circuit Solver
Graphical Circuit Visualizer
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