Transformer Sizing Calculator
Calculate required transformer capacity (kVA) for single-phase and three-phase loads with safety reserve sizing.
Electrical Parameters
Minimum Transformer Size
83.1
kVA
Recommended Standard Size:
112.5 kVA
Base Continuous Load:
83.1 kVA
kVA = (480V × 100A × 1.732) / 1000 = 83.1 kVA
Standard Transformer Sizing Guide
Standard commercial transformer ratings include 15, 30, 45, 75, 112.5, 150, 225, 300, and 500 kVA. Always select the next standard size above your safety-margined continuous load.