Transformer Calculator
Calculate transformer turns ratio, voltage, and current.
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How It Works
Calculate transformer turns ratio, voltage, and current. Enter your values and press Calculate for instant results with a full formula breakdown.
Formula
V1/V2 = N1/N2 = I2/I1Quick Reference
Common calculations — results you can verify instantly.
120V primary, 240V secondary, 100 turns
100×240/120
200 turns secondary
Step-down 480V to 120V
4:1 turns ratio
480÷4=120V
Power stays same
Ideal transformer
VI primary = VI secondary
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