Which conversion factor is a measured number

Conversion Factors A conversion factor is a ratio that specifies how one unit of measurement is related to another unit of measurement. Conversion factor can be used within a system of units or between different units of system. For more information watch:. Attachments 1. YOU Add your Comment. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels.

Facebook Facebook Twitter Twitter. Cite this Article Format. Helmenstine, Anne Marie, Ph. Conversion Factor Definition and Examples. Measuring and Understanding Wood Volumes. Math Glossary: Mathematics Terms and Definitions. Often measurements are given in one set of units, such as feet, but are needed in different units, such as chains.

A conversion factor is a numeric expression that enables feet to be changed to chains as an equal exchange. A conversion factor is a number used to change one set of units to another, by multiplying or dividing. When a conversion is necessary, the appropriate conversion factor to an equal value must be used. For example, to convert inches to feet, the appropriate conversion value is 12 inches equal 1 foot.

To convert minutes to hours, the appropriate conversion value is 60 minutes equal 1 hour. The table is set up so all the units cancel except for the unit desired.

To cancel a unit, the same unit must be in the numerator and in the denominator. When you multiply across the table, the top number will be divided by the bottom number, and the result will be the answer in the desired units.

It may be necessary to multiply by more than one conversion ratio in more complex conversions. Use these steps to construct a unit conversion problem so one or more of the units cancel until only the desired unit remains:.

Step 1. Identify the unit you have. These are the Starting Units. Step 2. Identify the unit you want. These are the Desired Units. Step 3. Identify appropriate unit conversion factor s. These are the Linking or Ratio Unit s. Step 4.