Enter the number of tasks or processes and the time taken to complete each task or process into the calculator to determine the service time. This calculator can also evaluate any of the variables given the others are known.

Service Time Formula

The following formula is used to calculate the service time.

ST = (N * T) / E

Variables:

  • ST is the service time (minutes)
  • N is the number of tasks or processes
  • T is the time taken to complete each task or process (minutes)
  • E is the efficiency of the staff or system (percentage in decimal form)

To calculate the service time, multiply the number of tasks or processes by the time taken to complete each task or process. Then divide the result by the efficiency of the staff or system. The result is the total service time.

What is a Service Time?

Service time refers to the total time taken to complete a specific task or process in a service-oriented environment. This could include the time taken to respond to a customer request, process an order, or complete a transaction. It is a critical metric in operations management and customer service, as it directly impacts customer satisfaction and operational efficiency. Service time can be influenced by various factors such as staff efficiency, technology, and process design.

How to Calculate Service Time?

The following steps outline how to calculate the Service Time.


  1. First, determine the number of tasks or processes (N).
  2. Next, determine the time taken to complete each task or process (T) in minutes.
  3. Next, determine the efficiency of the staff or system (E) as a decimal.
  4. Finally, use the formula ST = (N * T) / E to calculate the service time.
  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.

Number of tasks or processes (N) = 5

Time taken to complete each task or process (T) = 10 minutes

Efficiency of the staff or system (E) = 0.8