This transformer calculator helps you to quickly and easily calculate the primary and secondary full-load currents of the transformer. It also determines the turns ratio and type of transformer.
Our Transformer Turns Ratio Calculator simplifies the process by allowing you to calculate the ratio using turns, voltage, or both. Just enter your values; our tool will instantly
In summary, the turns ratio is essential for understanding the voltage transformation between the primary and secondary sides of a transformer, while turns per volt
These calculators help determine the ratio of the number of turns in the primary coil to the number of turns in the secondary coil, which is crucial for voltage regulation and efficiency.
You need to have sufficient number of turns on the primary so that the primary voltage you apply, divided by the number of turns, does not exceed this volts per turn.
This example demonstrates how to apply the Turns Ratio formula using primary and secondary voltage values and the number of primary windings. Accurate calculations like these are
Because the number of turns on the primary is 6 times larger than the number of turns on the secondary, we can say that the primary voltage is 6 times larger than the
This calculator helps determine the number of turns required in the primary or secondary winding of a transformer based on input voltage, output voltage, core cross-sectional area, and frequency.

Turns ratio and turns per volt are two important concepts in transformer design and analysis. Turns ratio: The turns ratio is the ratio of the number of turns in the primary winding (Np) to the number of turns in the secondary winding (Ns). It determines the relationship between the input (primary) and output (secondary) voltages of a transformer.
The secondary voltage is smaller, so the number of secondary turns should be less. The ratio of V P to V S is 20 to 1, so the ratio of turns should also be 20 to 1: 60 × 20 = 1,200; this is the number of turns on the primary, so our answer is correct.
The transformer turns ratio is the ratio of the number of turns in the primary coil to the number of turns in the secondary coil. This ratio determines how voltage is transformed from the primary to the secondary winding. Formula for Turns Ratio The turns ratio (TR) of a transformer is given by: Where:
The inductance is proportional to the number of turns squared, and a small 120/240V 50/60Hz mains transformer primary might be some hundreds of turns, so you can see how far off a single turn is. At a fraction of a volt, or higher frequencies at relatively low voltage, a single-turn primary might make some sense.
Look at the last example: A transformer must supply 24 volts from a 480-volt supply, and the number of turns on the primary is 1,200, so to find the secondary turns required, we fill in the information we know in the transformer ratio:
Another way to think of this last problem is that the ratio of primary turns to secondary turns is 1 to 4. As we have seen, the ratio of primary voltage to secondary voltage is the same as that of primary turns to secondary turns, so the voltage ratio must also be 1 to 4.
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