Transformer kVA Calculator
Enter any two of Voltage, Amperage, and kVA. The calculator solves for the third. Voltage is line-to-line.
Known Values
Formulas — Single-phase: kVA = V × A ÷ 1000. Three-phase: kVA = √3 × V × A ÷ 1000. For sizing transformers, always apply your design margin and verify with the NEC and manufacturer data.
Other Calculators Available
Conduit Fill
Calculator
A quick and easy way to check what wire sizes will fit in different types of conduit, per NEC guidelines
Conduit Fill is the percent of area inside the conduit taken up by the cable(s).
Voltage Drop
Calculator
This tool helps determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of your conductors
SQFT Bid
Calculator
A tool designed to help you quickly estimate project costs based off of square footage and your own cost metrics