What does the 1st percentile mean?

There are numerous places where you may have seen the 1st percentile (first percentile) used. You know that your measurement or score is in the 1st percentile of a group, but do you know what it actually means? The 1st percentile can mean different things and we will start by giving you a couple of examples:

Test Score: This may be the most common place where percentile is used in daily life. If your test score is in the 1st percentile, it means that you scored better than 1 percent of all the test takers. It also means that 99 percent scored the same or better than you.

Growth Chart: A growth chart is often used by pediatricians to show how a child's height, weight, and head circumference compare to other children over time. If your child's height is in the 1st percentile, it means that 1 percent of the children are shorter than your child, and 99 percent of children are the same or taller than your child.

Based on the examples above, this is how we would define the 1st percentile: The 1st percentile means that 1 percent or more is below you and 99 percent is above you. The percentile is a way of illustrating how common your result is compared to others.

Percentile Meaning
Here you can enter another percentile for us to explain.

What does the 2nd percentile mean?
Here is the next percentile on our list that we have explained for you.