Enter your total power need, desired runtime, and fuel type into the calculator to determine your generator size.

Generator Sizing Formula

The following formula is used to calculate the size of the generator you need.

Generator Size (kW) = (Total Power Need (Watts) * Runtime (Hours)) / 1000

Variables:

  • Total Power Need is the sum of all power requirements of your appliances (Watts)
  • Runtime is the duration for which the generator needs to run (Hours)

To calculate the generator size, multiply the total power need by the runtime and then divide the result by 1000 to convert it to kilowatts.

What is Generator Sizing?

Generator sizing refers to the process of determining the appropriate generator capacity needed to supply power to all necessary appliances and systems during a power outage. This ensures that the generator can handle the