Transformer Turns Ratio Calculator
Calculate the secondary voltage of an ideal transformer from the primary voltage and the number of turns on each winding (Vs = Vp × Ns / Np).
- Turns ratio (Np : Ns)
- 5.00 : 1
Formula: Vs = Vp × Ns / Np
About Transformer Turns Ratio Calculator
Transformer Turns Ratio Calculator is a free online calculator that gives you an instant, accurate result as you type. Calculate the secondary voltage of an ideal transformer from the primary voltage and the number of turns on each winding (Vs = Vp × Ns / Np).
The calculation uses the standard formula Vs = Vp × Ns / Np and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
A transformer with more primary than secondary turns steps voltage down; the current changes inversely, keeping ideal power equal on both sides.
Frequently Asked Questions
Is Transformer Turns Ratio Calculator free to use?
Yes. Transformer Turns Ratio Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (Vs = Vp × Ns / Np) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
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