kVA to Amps Calculator (Single & Three Phase)
Convert transformer power rating (kVA) to electrical current.
Use this kVA to amps calculator to determine full load current for transformers, switchgear, and electrical equipment in single-phase and three-phase systems.
Transformer Parameters
System Configuration
Power Specification
Full Load Amps (FLA)
Line Current
Current
0
A
Amperes
Kiloamps
0
kA
Equivalent in kA
Equipment Sizing Guide
NEC / IEC Ref
125% Continuous Load
0
A
Standard breaker/cable multiplier
Engineering Reference
Three Phase Formula
I = (kVA × 1000) / (√3 × V)
Single Phase Formula
I = (kVA × 1000) / V
- I = Full Load Amps (FLA)
- S = Apparent Power (kVA)
- V = Line-to-Line Voltage
- 125% = Recommended safety factor for continuous loads