Transformer kVA Calculator

Calculate transformer apparent power rating for single-phase or three-phase service.

480 V 3φ @ 100 A =

83.14 kVA

Representative value from the Transformer kVA Calculator reference table.

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Transformer kVA Calculator

Estimate apparent power requirement from voltage and current.

Estimated Transformer kVA

Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Transformer kVA Calculator Reference
ConditionTransformer Size
480 V 3φ @ 10 A8.31 kVA
480 V 3φ @ 20 A16.63 kVA
480 V 3φ @ 30 A24.94 kVA
480 V 3φ @ 40 A33.26 kVA
480 V 3φ @ 50 A41.57 kVA
480 V 3φ @ 75 A62.35 kVA
480 V 3φ @ 100 A83.14 kVA
480 V 3φ @ 125 A103.92 kVA
480 V 3φ @ 150 A124.71 kVA
480 V 3φ @ 200 A166.28 kVA
480 V 3φ @ 250 A207.85 kVA
480 V 3φ @ 300 A249.42 kVA