Conversion of units
The term "conversion of units" refers to changing an amount of a measurement unit into another unit. There are many different systems of units, so some conversions can be very complex. Most conversions involve a conversion factor (named "m"), and a shift amount (such as "b"), to change from a unit x into a unit y by the general equation: y = m • x + b. That type of conversion is known as a linear transform or a mathematical translation.
A conversion factor is a ratio that lets you convert a measured quantity to a different unit of measure without changing the amount. When a conversion factor is multiplied by the item you are converting, it cancels out the units you do not want and leaves those that you do. Because the top and bottom of conversion factors are the same, conversion factors always equal 1. For example, a conversion factor of (1 day)/(24 hours) equals 1, because 1 day = 24 hours.
- Convert 10 meters: 10 meters * 3.28 ft/m = 32.8 feet.
Typically, conversion amounts are rounded to the same precision as the original input amount, such as 10 meters being 33 feet (when 32.8 feet is rounded to 2 digits as "33").Metric conversions are taught very early because they benefit for a really long time!!