6-4: Converting Units

Key Concept

You can often write measurements in more than one way. For example, 1 hour = 60 minutes.

You can express the relationship between the two equivalent measurements as a rate. The rate equals 1 and is called a conversion factor.

A conversion.

You can use a conversion factor to convert between two units of measure. Write the rate with the unit you are converting to as the numerator and the unit you are converting from as the denominator.

Part 1

Example Comparing Feet and Inches to Centimeters

Is a rider 3 feet 10 inches tall allowed to ride this roller coaster? Use 1 inch = 2.54 centimeters.

You must be at least 100 cm tall to ride…


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Table of Contents

Digits, Grade 7, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Expressions, Equations, and Relationships Unit C: Measurement and Geometry Unit D: Proportionality English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties