How to use this midrange calculator
Enter your dataset above and press Calculate: the midrange is the average of the minimum and maximum, shown with both endpoints and the rest of the summary for context.
What is the midrange?
The midrange is the midpoint of the data's extent: (minimum + maximum) ÷ 2. It is the fastest centre anyone can compute (two values and one addition), and for small, roughly symmetric datasets it gives a perfectly serviceable quick estimate.
A week of temperatures: 31, 34, 29, 36, 33, 30, 32. Minimum 29, maximum 36, so midrange = (29 + 36) ÷ 2 = 32.5 °C, indeed close to the week's mean of 32.1. Weather summaries quote exactly this number when they report the "average of the week's high and low".
Handle with care
The midrange trusts the two most extreme values in the entire dataset, the pair most likely to be freaks or typos. One bad reading moves it completely. That is why it survives mainly in quick estimates, quality-control charts for tiny samples, and as a teaching stepping stone toward sturdier centres like the median. Know it, use it for a first glance, and never let it testify alone.
Frequently asked questions
How is the midrange calculated?
Add the minimum and maximum values and divide by 2: (min + max) ÷ 2.
What is the difference between midrange and range?
The range is max − min (a spread). The midrange is (max + min) ÷ 2 (a centre). Despite the names, they answer different questions.
Why is the midrange rarely used in research?
It depends entirely on the two most extreme values, making it the least dependable measure of centre. The median and mean use the data far more efficiently.