Ideal transformer

For an ideal transformer, the voltage ratio equals the turns ratio. More secondary turns increase voltage; fewer turns decrease it.

Formula usedV₂/V₁ = N₂/N₁

Visual cue · field / circuit

Calculate

What do you want to calculate?

Primary voltage

Secondary voltage

Primary turns

Secondary turns

What do the symbols mean?

V₁primary voltage

V₂secondary voltage

N₁primary turns

N₂secondary turns

Example 1

1,000 primary turns and 100 secondary turns convert 230 V to 23 V ideally.

Example 2

A 2:1 turns ratio ideally doubles the voltage from primary to secondary.

Good to knowThis relation assumes an ideal transformer and uses RMS voltage magnitudes for sinusoidal AC.