Transformer Turns Ratio Solver
Given any three of primary voltage, secondary voltage, primary turns, and secondary turns, solve the fourth using the ideal transformer ratio.
Limitations: Ideal transformer only. Does not include winding resistance, core loss, leakage reactance, voltage regulation, efficiency, inrush current, or insulation limits.
What to do next: Use this to sanity-check step-up and step-down ratios. Real transformer selection still needs VA rating, frequency, thermal class, and insulation checks.