Calculate voltages, currents, and turns ratios for an ideal electrical transformer.
Transformer Parameters
Calculation Results
Enter parameters to calculate
About this calculator
Quick Reference
Vp / VsVoltage Ratio
Np / NsTurns Ratio
Is / IpInverse Current Ratio
IdealZero Resistance, Zero Leakage
Overview
An ideal transformer is a theoretical linear transformer that is lossless and perfectly coupled. Real transformers approach this behavior with high efficiency (often >95%).
💡
Pro Tips
In a step-up transformer, Ns > Np and Vs > Vp.
In a step-down transformer, Ns < Np and Vs < Vp.
Power remains constant in an ideal transformer: Vp × Ip = Vs × Is.
!
Fun Facts
"Transformers only work with Alternating Current (AC) because they rely on electromagnetic induction."
