Calculate load percentage from current load and rated capacity, plus spare headroom, the capacity you need, and the max load allowed at your limit.

Utilization arithmetic does not certify equipment or circuit safety. Use the manufacturer’s applicable duty rating and an independently established limit.

Use the same quantity and unit for both. Changing this label reinterprets the entered values.

In the load-at-limit mode, blank omits current headroom.

Default 100%. Use your documented operating limit; no universal generator limit is assumed.

Optional settings

Optional. Blank means 0. Uses the same phase and power factor as the current load.

Related Calculators

Load Percentage Formula

The following formula is used to calculate the load percentage.

LP = (CL / ML) × 100

Variables:

  • LP is the load percentage (%)
  • CL is the current load (units)
  • ML is the maximum load (units)

To calculate the load percentage, divide the current load by the maximum load and then multiply by 100 to convert it to a percentage.

What is Load Percentage?

Load percentage compares an entered load with a rating of the same quantity and units. For generators, both real-power (kW) and apparent-power (kVA) limits matter; actual load power factor may differ from rated power factor. The circuit mode provides continuous/non-continuous arithmetic, with a separate verified 100%-rated-assembly option; it does not select or approve an installation. A chosen limit or a percentage below 100% does not establish safe operation. Follow the manufacturer’s duty rating and applicable engineering requirements.

How to Calculate Load Percentage?

The following steps outline how to calculate the Load Percentage.

  1. First, determine the current load (CL) in units.
  2. Next, determine the maximum load (ML) in units.
  3. Next, gather the formula from above: LP = (CL / ML) * 100.
  4. Finally, calculate the Load Percentage (LP) in percent.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

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

current load (CL) = 75 units

maximum load (ML) = 150 units