Transformer Calculator

Free transformer calculator. Enter primary voltage, primary current, secondary voltage, and efficiency to calculate turns ratio, secondary current, primary and secondary power, and power loss.

Calculate transformer turns ratio, secondary current, power, and efficiency.

\frac{V _{p}}{V _{s}} = \frac{N _{p}}{N _{s}} = \frac{I _{s}}{I _{p}}, P = V I, η = \frac{P _{o u t}}{P _{in}} \times 100%

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