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Transformer Voltage & Turns Ratio Calculator

V2/V1 = N2/N1 — ideal transformer voltage ratio.

Calculates secondary voltage, current, and turns for an ideal transformer given primary specifications and turns ratio.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

V2 = V1 × N2/N1; I2 = I1 × N1/N2

In depth

Calculates secondary voltage, current, and turns for an ideal transformer given primary specifications and turns ratio.