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# Measurement for Praxis I: Pre-Professional Skills Test Study Guide

By LearningExpress Editors
LearningExpress, LLC

This section reviews the basics of measurement systems used in the United States (sometimes called customary measurement) and other countries, methods of performing mathematical operations with units of measurement, and the process of converting between different units.

The use of measurement enables a connection to be made between mathematics and the real world. To measure any object, assign a number and a unit of measure. For instance, when a fish is caught, it is often weighed in ounces and its length measured in inches. The following lesson will help you become more familiar with the types, conversions, and units of measurement.

### Types of Measurements

The types of measurements used most frequently in the United States are listed here:

Units of Length
12 inches (in.) = 1 foot (ft.)
3 feet = 36 inches = 1 yard (yd.)
5,280 feet = 1,760 yards = 1 mile (mi.)
Units of Volume
8 ounces* (oz.) = 1 cup (c.)
2 cups = 16 ounces = 1 pint (pt.)
2 pints = 4 cups = 32 ounces = 1 quart (qt.)
4 quarts = 8 pints = 16 cups = 128 ounces = 1 gallon (gal.)
Units of Weight
16 ounces* (oz.) = 1 pound (lb.)
2,000 pounds = 1 ton (T.)
Units of Time
60 seconds (sec.) = 1 minute (min.)
60 minutes = 1 hour (hr.)
24 hours = 1 day
7 days = 1 week
52 weeks = 1 year (yr.)
12 months = 1 year
365 days = 1 year
*Notice that ounces are used to measure the dimensions of both volume and weight.

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