Ideal Transformer Calculator

Our Ideal Transformer Calculator lets you instantly determine the primary or secondary voltage of a transformer, as well as the turn ratio, using the key parameters Vp, Vs, Np, and Ns. With this intuitive tool, you can quickly calculate any variable from the others—perfect for students, hobbyists, and electronics engineers.

Acting as a full transformer turn ratio calculator, it provides an easy way to find the exact ratio between primary and secondary windings. It also serves as a transformer calculator turns, ideal for verifying or designing a theoretical transformer before testing or simulation.

Whether you need to compute an unknown voltage, validate a circuit design, or better understand transformer behavior, this tool works as a complete transformer secondary & primairie voltage calculator. Streamline your calculations, save time, and enhance your understanding of electrical circuits with this essential utility.

How does a transformer work?

A transformer works by transferring electrical energy from one circuit to another through a changing magnetic field, without any direct electrical connection between the windings. When an AC voltage is applied to the primary coil, the alternating current creates a varying magnetic field in the core. This magnetic field links to the secondary coil and induces a voltage according to Faraday's law. The output voltage depends on the turn ratio between the primary and secondary: more turns on the secondary increase the voltage, while fewer turns reduce it. In this way, a transformer can step up or step down voltage while ideally preserving the same power, making it a fundamental component in energy distribution and electrical systems.

The Turn Ratio Determines the Output Voltage

The output voltage depends on the ratio of the number of turns:

If Ns > Np, the transformer steps up the voltage.

If Ns < Np, it steps down the voltage.

Power Is (Almost) Conserved

In an ideal transformer:

So if voltage goes up, current goes down, and vice versa.