# How Big Are Centimeters? – Khan Academy Blog

Are you curious about the size of centimeters? Well, you’re in the right place! In this article, we’ll explore how big centimeters are and how they compare to other units of measurement.

First, let’s start with the basics. A centimeter (cm) is a unit of measurement that is used to measure length or distance. It’s a metric unit, which means that it’s based on the International System of Units (SI).

So, how big is a centimeter? One centimeter is about the width of your pinky finger. It’s a small unit of measurement, but it’s commonly used for measuring things like the length of a pencil or the width of a piece of paper.

Now, let’s compare centimeters to other units of measurement. One centimeter is equal to 0.01 meters, which is a larger unit of measurement. To put that into perspective, a meter is about the height of a doorway.

On the other hand, one centimeter is equal to 10 millimeters (mm), which is a smaller unit of measurement. To help you visualize this, imagine that a millimeter is about the width of a grain of rice.

You may also hear people use inches to measure length or distance. One inch is equal to about 2.54 centimeters. That means that centimeters are a smaller unit of measurement than inches.

It’s important to understand the size of centimeters and how they compare to other units of measurement because it helps us make sense of the world around us. Whether we’re measuring the length of a bookshelf or the height of a person, we can use centimeters to get a precise measurement.

In conclusion, centimeters are a small unit of measurement that are commonly used to measure length or distance. They’re equivalent to 0.01 meters and 10 millimeters. By understanding the size of centimeters and how they compare to other units of measurement, we can make more informed measurements and better understand the world we live in.