The TI89 is a graphing calculator you can use for advanced classes, such as trigonometry, chemistry or physics. One of the useful features of the TI89 is its ability to convert one unit to another unit. For example, it can convert inches to meters. This allows you to make conversions without needing to know the conversion factors between the units. This will save you the time of researching the conversion and performing the math by hand.
Things You'll Need
 TI89 graphing calculator

Type into the calculator the unit you want to convert. For example, assume it is 10 meters. You would type "10."

Press "2nd," then "3."

Scroll down to the type of unit you have, then press the right arrow key. In the example, meters is a unit of length, so go down to length.

Find your unit and press "ENTER." In the example, find meters and press "ENTER."

Press "2nd," then "Mode."

Press "2nd," then "3."

Scroll down to the type of unit you want to convert to, then press the right arrow key. In the example, if you want to convert meters to inches, go down to length, since inches is a unit of length.

Find the unit you want to convert to and press "ENTER." In the example, find inches and press "ENTER."

Press "ENTER" for the conversion.