What Is the Median?
The median is the middle value of a data set once the values are sorted in order. With an odd number of values, it is the single middle value; with an even number, it is the average of the two middle values. Half of the values are at or below the median and half are at or above it.
Examples
For 3, 7, 9, 12, 20 the median is 9. For 3, 7, 9, 12 the median is (7 + 9) ÷ 2 = 8.
Why the Median Is Used
Because it depends on the middle position rather than the size of extreme values, the median is less affected by outliers. That is why statistics such as household income and home prices are often reported as medians.
🧮 Calculate It Yourself
Put Median into practice with this free calculator — no sign-up, nothing stored.
🔗 Related Terms
More Math & Statistics Terms
📖 Browse all glossary terms or explore all free calculators.
Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.