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Transformer Turns Ratio Calculator — Solve Voltage or Winding Turns

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Solve for Primary voltage Vp (V) Ignored when Vp is selected as the unknown.Secondary voltage Vs (V) Ignored when Vs is selected as the unknown.Primary turns Np Ignored when Np is selected as the unknown.Secondary turns Ns Ignored when Ns is selected as the unknown.

Calculated result

100 secondary turns

Primary:secondary voltage ratio = 10:1

Primary:secondary turns ratio = 10:1 · voltage step-down

Ideal current relationship: Is/Ip = 10

Show the working

1. Ns = 1,000 × 24 ÷ 240 = 100 turns.
2. Vp/Vs = 240 ÷ 24 = 10.
3. Np/Ns = 1,000 ÷ 100 = 10.

Ideal turns/voltage relationship only. Regulation, winding losses, taps, core design and insulation constraints are not modeled.

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