Transformer Sizing (kVA) & Full-Load Current Calculator

Convert single-phase or three-phase load amperage into exact kVA, standard NEMA transformer ratings, and primary/secondary full-load amps.

4. Transformer Sizing (kVA) & Full-Load Amps Calculator

Transformer Phase

Primary Voltage (V)

Secondary Voltage (V)

Secondary Load (Amps)

Include 25% Future Expansion & Continuous Margin (1.25x)