Electrical

Ideal Transformer Voltage Calculator

Find secondary voltage from a transformer’s turns ratio.

Ideal component relationshipsUnits and assumptions explained below
Circuit workbench
Circuit workbench

Keep RMS, peak and DC values distinct.

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Enter circuit values

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Your circuit result

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter voltage, primary turns, secondary turns.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

InputFormat and unitsSample
VoltageNumeric value. Unit: V. Zero or positive.12
Primary turnsNumeric value. Unit: turns. Must be greater than zero.1000
Secondary turnsNumeric value. Unit: turns. Must be greater than zero.100

Result for these sample inputs

1.2 V

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

Secondary voltage = primary voltage × secondary turns/primary turns.

A WORKED EXAMPLE

Using voltage = 12 V, primary turns = 1000 turns, secondary turns = 100 turns, the result is 1.2 V. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

Ideal-component calculation for study and estimation. It does not select safe wiring, protective devices or component ratings for an installation.

Methodology maintained by ClarityKit. How these tools are built and checked.