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PHYSICS / ELECTROMAGNETISM

Ideal Transformer Ratio Calculator

Calculate ideal secondary voltage and current from winding turns and primary conditions. Inspect the SI equation, substituted inputs, derived result, and physical limitations in one guided workspace.

  • 01 Calculated in this tab
  • 02 Values stay in this browser tab
  • 03 Use boundary

Conversion input

Known value

Filter by unit name, symbol, or code. Your current selections remain available.

Preparing the calculator...

Use boundary

Calculation path

Calculate ideal secondary voltage and current from winding turns and primary conditions. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

V_s/V_p=N_s/N_p

What you provide

What you provide

  • Primary voltage expressed in V, using the same scenario as the other inputs
  • Primary turns, using the same scenario as the other inputs
  • Secondary turns, using the same scenario as the other inputs
  • Primary current expressed in A, using the same scenario as the other inputs

What you receive

What you receive

  • Secondary voltage in V from the stated equation
  • A symbolic formula plus substituted working with your values
  • Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

The transformer is ideal with perfect coupling, no saturation, no losses, and compatible AC frequency.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

Reviewed reference factors