Enter the word count and your reading speed into the calculator to determine the first word latency. This calculator helps to estimate the time delay before reading out loud.

First Word Latency Formula

The following formula is used to calculate the first word latency.

L = frac{WC}{RS} times 60

Variables:

  • L is the latency (seconds)
  • WC is the word count
  • RS is the reading speed (words per minute)

To calculate the first word latency, divide the word count by the reading speed to get the time in minutes, then multiply by 60 to convert it to seconds.

What is First Word Latency?

First word latency is the time it takes for a person to begin speaking or reading out loud after being prompted with text. It is a measure of processing speed and fluency and can be an important metric in various fields such as linguistics, cognitive psychology, and speech therapy.

How to Calculate First Word Latency?

The following steps outline how to calculate the First Word Latency.


  1. First, determine the word count (WC) of the text.
  2. Next, determine your reading speed (RS) in words per minute.
  3. Use the formula from above = L = (WC / RS) * 60.
  4. Finally, calculate the First Word Latency (L) in seconds.
  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.

Word Count (WC) = 120 words

Reading Speed (RS) = 240 words per minute