Convert kVA to units and real power by entering load and power factor to estimate kW and kWh used in one hour of electricity usage.

kVA to Units Converter

Enter the load in kVA and choose a power factor to calculate the electricity units used in one hour.

kVA to Units Formula

The following formula is used to calculate electricity units from a kVA load.

\text{Units} = \text{kVA} \times PF \times h

For one hour of operation, the formula becomes:

\text{Units per Hour} = \text{kVA} \times PF

Variables:

  • Units are the energy consumed in kilowatt-hours (kWh)
  • kVA is the apparent power of the load
  • PF is the power factor of the load
  • h is the operating time in hours

Because one electricity unit is equal to one kilowatt-hour, this conversion is useful for estimating energy usage from generators, motors, and other electrical loads. The real power is first found using kW = kVA × PF, and that real power is then multiplied by time to determine units consumed.

What is kVA to Units Conversion?

kVA to units conversion is the process of estimating how much electrical energy a load will use based on its apparent power rating and power factor. A meter records usage in units, where one unit equals 1 kWh. Since kVA represents apparent power and not all of it becomes useful real power, the power factor must be applied before calculating energy consumption.

For example, a 10 kVA load operating at a power factor of 0.80 produces 8 kW of real power. If it runs for one hour, it uses 8 units. If it runs for 8 hours, it uses 64 units.

How to Calculate kVA to Units?

The following steps outline how to calculate units from a kVA value.

  1. First, determine the load rating in kVA.
  2. Next, determine the power factor (PF) of the load.
  3. Calculate the real power using kW = kVA × PF.
  4. Multiply the kW value by the operating hours to determine units in kWh.
  5. For one hour of operation, the units are equal to kVA × PF.
  6. After calculating the result, check your answer with the calculator above.

kVA to Units Conversion Table (Per Hour)

The table below shows sample hourly unit consumption for a 10 kVA load at different power factors.

Power Factor (PF) Real Power (kW) Units per Hour (kWh)
1.00 10.0 10.0 units
0.95 9.5 9.5 units
0.90 9.0 9.0 units
0.85 8.5 8.5 units
0.80 8.0 8.0 units

To estimate usage over a longer period, multiply the units per hour by the total runtime. This makes it easy to check expected electricity consumption for daily, weekly, or monthly operation.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Load = 10 kVA

Power Factor = 0.80

Time = 1 hour

Units = 10 × 0.80 × 1 = 8 kWh (8 units)