Enter the request time (ms) and the process time (ms) into the Calculator. The calculator will evaluate the Access Time. 

Access Time Formula

AT = RT + PT


  • AT is the Access Time (ms)
  • RT is the request time (ms)
  • PT is the process time (ms)

To calculate Access Time, simply sum the request time and the total processing time.

How to Calculate Access Time?

The following steps outline how to calculate the Access Time.

  1. First, determine the request time (ms). 
  2. Next, determine the process time (ms). 
  3. Next, gather the formula from above = AT = RT + PT.
  4. Finally, calculate the Access 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.

request time (ms) = 0.34

process time (ms) = 0.12

Frequently Asked Questions

What is access time and why is it important?

Access time refers to the duration required to retrieve data or complete an operation, combining both the request time and the processing time. It’s crucial in computing and data processing as it directly impacts system performance and user experience.

How can reducing access time improve system performance?

Reducing access time speeds up data retrieval and processing, leading to faster execution of programs and tasks. This improvement in speed can significantly enhance the overall efficiency and responsiveness of a computing system.

Are there tools or methods to measure access time accurately?

Yes, there are various tools and software available designed to measure access time. These tools can help identify bottlenecks in data retrieval and processing, allowing for targeted improvements. The calculators linked in the content are examples of such tools.

Can access time vary based on the type of storage device used?

Yes, access time can greatly vary depending on the storage device. For example, Solid State Drives (SSDs) typically have faster access times compared to Hard Disk Drives (HDDs) due to the differences in their technology and how data is stored and retrieved.