Response Times Median Calculator

Find the median response time to describe the middle observation in a timing sample.

How to use Response Times Median Calculator

1. Enter Response Times Values as matching lists where weights are used; separate numbers with commas, spaces, semicolons or new lines. 2. Keep all observations on one unit or scoring scale. 3. Select Calculate or press Enter, then read median. 4. Copy result copies the answer; Reset clears the form. Do not use thousands separators inside lists.

Why use this tool?

Compare a typical response time with the mean when a timing sample has a long slow tail.

How the calculation works

Sort the observations. For an odd count, return the middle value; for an even count, average the two middle values. Enter non-negative timings in the same unit, such as milliseconds. Results use that unit. This page processes your list; it does not run a website speed test or enforce a service-level agreement. Results use up to six decimal places, or six significant digits in scientific notation for nonzero magnitudes below 0.000001. Calculations use browser floating-point arithmetic. Each list supports up to 20,000 numbers. Entry and result magnitudes must not exceed 9,007,199,254,740,991; unrepresentable variance or weighted products are rejected. General descriptive-statistics reference: https://www.itl.nist.gov/div898/handbook/eda/section3/eda351.htm. Weighted conventions are defined explicitly on this page.

Example

For response times 100,120,130,450, the median is 125.

Practical tip

The median describes the centre by rank. Keep repeated observations when they are real readings rather than accidental duplicate entries.