basic

Ideal Transformer Turns Ratio and Secondary Voltage Calculator

V₂/V₁ = N₂/N₁; I₁N₁ = I₂N₂ (ideal).

Compute the secondary voltage, current, and turns ratio of an ideal transformer: V₂ = V₁ · N₂/N₁; I₂ = I₁ · N₁/N₂. Power is conserved (P = V₁I₁ = V₂I₂). Use for step-up or step-down power transformer design and verification.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

V
A

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

V₂ = V₁·N₂/N₁; I₂ = I₁·N₁/N₂.

In depth

Compute the secondary voltage, current, and turns ratio of an ideal transformer: V₂ = V₁ · N₂/N₁; I₂ = I₁ · N₁/N₂. Power is conserved (P = V₁I₁ = V₂I₂). Use for step-up or step-down power transformer design and verification.