Calculate idle time, idle percentage, and utilization percentage from total available time, operating time, and maintenance time inputs.

Use one reporting period. Operating and maintenance time must not overlap.

Maintenance time

Blank means zero. Maintenance is excluded from idle time.

Related Calculators

Idle Hours Formula

The following formula is used to calculate the idle hours for a given set of values.

I = T - (O + M)

Variables:

  • I is the idle hours
  • T is the total available hours
  • O is the operating hours
  • M is the maintenance hours

To calculate the idle hours, subtract the sum of the operating hours and maintenance hours from the total available hours.

What are Idle Hours?

Idle hours refer to the time during which a machine, a piece of equipment, or a workforce is available but not in use. In this calculator, idle time excludes the separately entered maintenance time. Lack of demand or operational inefficiencies can contribute to the remaining idle time. Idle hours are an important metric in industries as they can indicate potential areas for improvement in productivity and efficiency.

How to Calculate Idle Hours?

The following steps outline how to calculate the idle hours.

  1. First, determine the total available hours (T).
  2. Next, determine the operating hours (O).
  3. Next, determine the maintenance hours (M).
  4. Finally, calculate the idle hours using the formula I = T - (O + M).
  5. After inserting the values 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.

Total available hours (T) = 100 hours

Operating hours (O) = 60 hours

Maintenance hours (M) = 10 hours

Using the formula I = T - (O + M), the idle hours (I) would be calculated as follows:

I = 100 - (60 + 10) = 30 hours