Amps to kVA Calculator

Convert amps to kVA (kilovolt-amps) for single-phase and three-phase circuits. Calculate the apparent power rating needed for generators, transformers, and UPS systems.

A
V

APPARENT POWER

22 kVA

IN VA

22,000 VA

PHASE

Single-Phase

FORMULA

S = (IΓ—V)/1000

Amps to kVA β€” Conversion Table (Single-Phase)

Amps120V208V220V240V480V
10 A1.2 kVA2.08 kVA2.2 kVA2.4 kVA4.8 kVA
20 A2.4 kVA4.16 kVA4.4 kVA4.8 kVA9.6 kVA
30 A3.6 kVA6.24 kVA6.6 kVA7.2 kVA14.4 kVA
50 A6 kVA10.4 kVA11 kVA12 kVA24 kVA
80 A9.6 kVA16.64 kVA17.6 kVA19.2 kVA38.4 kVA
100 A12 kVA20.8 kVA22 kVA24 kVA48 kVA
125 A15 kVA26 kVA27.5 kVA30 kVA60 kVA
150 A18 kVA31.2 kVA33 kVA36 kVA72 kVA
200 A24 kVA41.6 kVA44 kVA48 kVA96 kVA
300 A36 kVA62.4 kVA66 kVA72 kVA144 kVA
400 A48 kVA83.2 kVA88 kVA96 kVA192 kVA
600 A72 kVA124.8 kVA132 kVA144 kVA288 kVA

πŸ’‘ How to Convert Amps to kVA

Converting amps to kVA tells you the apparent power of your electrical load. This is crucial for sizing transformers, generators, UPS systems, and electrical panels.

Amps to kVA Formula

Single-Phase: S = (I Γ— V) / 1,000
Three-Phase: S = (I Γ— V Γ— √3) / 1,000

Where S is apparent power (kVA), I is current (amps), V is voltage (volts).

Example: 200-Amp Service (US Residential)

Most US homes have 200-amp, 240V single-phase service:
S = (200A Γ— 240V) / 1,000 = 48 kVA

A standard 200-amp residential service panel has a 48 kVA capacity.

US Residential Service Sizes

Service (Amps)VoltagekVA CapacityTypical Home
100 A240V24 kVASmall homes, condos
150 A240V36 kVAMedium homes
200 A240V48 kVAMost US homes
320 A240V76.8 kVALarge homes, EV charging
400 A240V96 kVALarge estates, workshops

References

  • NFPA 70 β€” National Electrical Code (NEC), 2023 Edition, Article 230
  • IEEE Standard 141 (Red Book)
200 amps Γ— 240V = 48 kVA β€” the total capacity of a standard US 200-amp residential service panel.

Amps to kVA Calculator FAQ

πŸ”— Related Calculators

kVA to Amps CalculatorConvert kilovolt-amps (kVA) to amps for single-phase and three-phase AC circuits. Essential for generator sizing and transformer calculations.Amps to Watts CalculatorConvert amps to watts for DC and AC circuits. Enter current (amps) and voltage to calculate power in watts using Watt's Law. Supports single-phase and three-phase AC.Amps to Volts CalculatorConvert amps to volts using Ohm's Law (with resistance) or Watt's Law (with power). Supports DC, single-phase AC, and three-phase AC circuits.Watts to kWh CalculatorConvert watts to kilowatt-hours (kWh) to calculate energy consumption and electricity costs. See how much power your appliances use per day, month, or year.