Ohm's Law is one of the most fundamental principles in electrical engineering and physics. It establishes a relationship between voltage (V), current (I), and resistance (R) in any electrical circuit. According to Ohm's Law:
V = I × R
Where V is voltage in volts, I is current in amperes, and R is resistance in ohms. This simple formula helps engineers, students, and electricians calculate missing electrical parameters efficiently.
Using this online Ohm's Law calculator, you can calculate any of the three variables (V, I, or R) by providing the other two. It’s fast, accurate, and eliminates manual errors. Whether you’re designing circuits, troubleshooting, or doing homework, this tool provides instant results.
Ohm's Law is widely used in:
The primary formula is V = I × R. From this, you can derive I = V ÷ R or R = V ÷ I.
Yes, for purely resistive AC circuits, the same formula applies. For circuits with inductors or capacitors, phase angles must be considered.
Yes. Caltoo’s Ohm's Law calculator is completely free with no hidden fees or registration required.
Yes. The calculator works smoothly on smartphones, tablets, and desktops.
The Ohm's Law calculator by Caltoo is an essential online tool for anyone dealing with electricity and circuits. By providing accurate and instant results, it simplifies electrical calculations, enhances understanding, and ensures safe and efficient circuit design. Bookmark this page to access this free tool whenever you need it.