UOM Converter
kVA · kW · amps
Transformer, generator and UPS sizing. Three-phase uses line-to-line volts.
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More optionsPower factor 1
75 kVA at 208 V three-phase
How it's calculated
- Single-phase: amps = kVA × 1,000 ÷ volts.
- Three-phase: amps = kVA × 1,000 ÷ (√3 × line-to-line volts).
- kW = kVA × power factor.
Not for motors: motor full-load amps come from the code tables, not this formula.
Worked examples
75 kVA at 208 V three-phase
- Line current: 208.2 A
- Real power: 75 kW
100 A at 480 V three-phase
- Apparent power: 83.14 kVA
- Real power: 83.14 kW
10 kW at 240 V single-phase
- Line current: 41.7 A
- Apparent power: 10 kVA
More in Electrical
Voltage dropVoltage drop on a run, and the smallest wire that keeps it within your target.- Power factor correctionCapacitor kvar needed to raise a load's power factor, and what it does to kVA and current.
- Transformer fault currentFull-load current and the maximum fault current at a transformer's secondary terminals, from kVA and nameplate impedance.
- Motor speed & slipSynchronous speed from frequency and poles, slip from the nameplate speed, and the same motor on the other frequency.
- Line ↔ neutral voltageThree-phase wye systems: line-to-neutral = line-to-line ÷ √3.
- Ohm's lawEnter any two of volts, amps, ohms and watts to get the other two.
- Energy costWhat a load costs to run, and what a retrofit saves.