Master Electrical Calculations Instantly with the T&M Atlantic Ohm’s Law Calculator

T&M Atlantic Ohm’s Law Calculator

If you’ve ever needed to calculate voltage, current, resistance, or power while building or troubleshooting an electronic circuit, the T&M Atlantic Ohm’s Law Calculator is the tool you’ve been waiting for. Whether you're an engineering student, a DIY electronics hobbyist, or a working electrician, this free online calculator makes it fast and easy to solve for unknown values using one of the most essential laws in electricity — Ohm’s Law.

Ohm’s Law defines the relationship between voltage (V), current (I), resistance (R), and power (P). With this calculator, you simply input any two values, and the tool automatically computes the other two using the relevant formulas:

V = I × R

I = V ÷ R

P = V × I

R = V ÷ I, and more

Instead of memorizing equations or crunching numbers manually, the calculator gives you instant results — saving time and improving accuracy.

Real-Life Examples

Example 1: Choosing the Right Resistor for an LED

You're powering a red LED from a 9V battery. The LED operates at 2V and 20mA.

Subtracting the LED voltage from the power source gives 7V across the resistor.

Enter V = 7V and I = 0.02A into the calculator.

Result: R = 350Ω, so you’d select a standard 330Ω or 360Ω resistor.

Example 2: Troubleshooting a Power Supply

You're measuring 5A of current across a 120V device, but the device is heating up.

Enter V = 120V and I = 5A.

Result: P = 600W, which may exceed the device’s rated limit — now you know it’s overloaded.

Example 3: Designing a Small DC Motor Circuit

You want to run a motor at 3A using a 24V supply.

Enter V and I into the calculator to find P = 72W and R = 8Ω, helping you choose proper wire gauges and fuse

The calculator is completely free to use, works on desktop and mobile devices, and has a clean, simple interface — perfect for classrooms, labs, or workbenches. No registration or installation required.

Who Is It For?

• Students learning electronics fundamentals
• Teachers demonstrating Ohm’s Law in class
• DIY makers building LED circuits, Arduino projects, or audio gear
• Technicians and engineers designing or testing equipment
• Electricians verifying loads and resistance in residential or industrial systems

Why Use It?

• Accurate, instant calculations
• No need to remember formulas
• Time-saving for prototyping and testing
• Supports learning and troubleshooting
• Helps avoid costly electrical mistakes

Don’t let circuit calculations slow you down. Try the T&M Atlantic Ohm’s Law Calculator today and power up your electronics projects with confidence!

Click here to access the calculator.