Transformer Turns Calculator

Calculate audio transformer impedance ratio from turns ratio, and vice versa. Includes voltage and power relationships.

Results

Visualization

How It Works

Audio transformers follow these relationships: voltage ratio = turns ratio (N = Ns/Np), impedance ratio = N², current ratio = 1/N. A 10:1 step-up transformer increases voltage 10×, increases impedance 100×, and decreases current 10×. Power is ideally preserved (real transformers have 0.5-2 dB insertion loss). Common uses: DI boxes (guitar to mic level, ~10:1 step-down), mic preamps (step-up for gain), isolation (1:1 to break ground loops), and impedance matching (600Ω to 10kΩ).