ProcirelCalculate the turns ratio of a transformer from primary and secondary voltages. Also determines secondary current based on primary current (assuming an ideal transformer with no losses). Identifies whether the configuration is step-up, step-down, or isolation (1:1). Fundamental for AC power supply design.
How to use this calculator
Step-by-Step Instructions
1. **Enter primary voltage** The voltage applied to the transformer input (e.g., 220V or 120V mains).
2. **Enter secondary voltage** The desired output voltage (e.g., 12V, 24V, 48V).
3. **Optionally enter primary current** If known, this allows calculation of secondary current and apparent power (VA).
4. **Click Calculate** The turns ratio, transformer type (step-up/step-down), and current/power values are displayed.
Worked Example
Vp = 220V, Vs = 12V Turns Ratio = 220/12 = **18.33:1 Step-Down**
With Ip = 0.1A Is = 0.1 × 18.33 = **1.83A**| Power = **22VA**