# Units of Length and Distance

**Standard Units:**

You are probably familiar with a lot of these measurements. *Length* is about a *distance*. These distances answer questions with "how far?", "how long?", and "how high?".

**1 foot = 12 inches** *(inches are usually divided into sixteenths on a ruler)*

**1 yard = 3 feet = 36 inches**

**1 mile = 1,760 yards = 5,280 feet = 63,360 inches**

*Metric Units:*

The basis of length units for the metric system is the *meter*. 1 meter is about( but not totally! ) the same length of 1 yard.

You already read that the metric system is based on units of ten so here's a starter list, but they go on forever.

**1 centimeter = 10 millimeters**

**1 meter = 100 centimeters = 1,000 millimeters**

**1 kilometer = 1,000 meters = 100,000 centimeters = 100,000,000 millimeters**

**Conversion:**

You're going to have to go back and forth with units. Converting inches into centimeters and

feet into meters is a regular thing in math and science classes. Here are a few conversions.

Technically you only need one conversion, but sometimes it's easier to use one closer to the

values you want.

**1 inch = 2.54 centimeters = 25.4 millimeters**

**1 foot = 30.48 centimeters**

**1 yard = 0.91 meters**

**1 mile = 1.6 kilometers**

**1 millimeter = 0.04 inches**

**1 centimeter = .39 inches = 0.0325 feet**

**1 meter = 3.28 feet**

**1 kilometer = 0.62 miles**

**Example:**

So if I'm going to run a 5 Kilometer race over the weekend, how many miles will I run? Answer: 3.1 miles

**Cite as:**Units of Length and Distance.

*Brilliant.org*. Retrieved from https://brilliant.org/wiki/units-of-length-and-distance/