Transformer Turns Ratio Calculator

Calculate transformer turns ratio and related parameters including voltage ratio, current ratio, and impedance transformation for various transformer configurations and applications.

Transformer Turns Ratio Relationships

Turns Ratio

a = Ns/Np

Voltage Ratio

Vs/Vp = Ns/Np = a

Current Ratio

Is/Ip = Np/Ns = 1/a

Impedance Ratio

Zs/Zp = (Ns/Np)² = a²

Key Relationships:

  • Voltage and turns are directly proportional
  • Current is inversely proportional to turns
  • Impedance is proportional to turns squared
  • Power remains constant (ideal transformer)

Calculation Method

Calculate from Voltages

V
V

About Transformer Turns Ratio

The turns ratio is the fundamental parameter that determines all transformer characteristics. It defines the relationship between primary and secondary voltages, currents, and impedances.

Key Relationships:

  • Voltage: Directly proportional to turns ratio
  • Current: Inversely proportional to turns ratio
  • Impedance: Proportional to square of turns ratio
  • Power: Remains constant in ideal transformer

Applications:

  • Voltage level conversion
  • Impedance matching
  • Electrical isolation
  • Current transformation

Design Considerations:

  • Choose ratio based on voltage requirements
  • Consider current handling capability
  • Account for losses and regulation
  • Ensure proper insulation for voltage levels