sumivo

Transformer Calculator

Calculate ideal secondary voltage from primary voltage and winding turns.

01 / INPUTS

V
turns
turns

02 / RESULT

SECONDARY VOLTAGE

115 V

Secondary voltage
115 V
Primary : secondary
2 : 1

Calculation trace

  1. 230 V × (50 ÷ 100) = 115 V
    115 V
    Secondary voltage
  2. 100 ÷ 50 = 2:1
    2
    Turns ratio

This ideal ratio calculation does not model winding losses or regulation.

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How it works

For an ideal transformer, voltage follows the turns ratio: Vs/Vp = Ns/Np, so the tool computes Vs = Vp·(Ns/Np). It reports the primary-to-secondary turns ratio separately as Np/Ns to 1.

Assumptions & limits

  • Uses the ideal-transformer relationship and does not model winding losses, core losses, leakage flux, regulation or load current.
  • Primary voltage and both turn counts must be positive finite numbers; frequency and core saturation are not evaluated.
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FAQ

When does a transformer step voltage up?
In the ideal ratio used here, secondary voltage exceeds primary voltage when the secondary has more turns than the primary.
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