Education Technology

Solution 11869: Performing Unit Conversions On The TI-89 Family,TI-92 Family, and Voyage™ 200 Graphing Calculators.

How do I convert units on the TI-89 family,TI-92 family, and Voyage 200 graphing calculators?

It is possible to convert from one unit to another in the same category, including user-defined units.

For example, to convert 4 light years to kilometers:

• Enter 4
• Press [2nd][3] to access the UNITS menu (On Voyage 200 press [♦][P])

• In the Length menu, select _ltyr,

• Press [2nd][MODE] to select the convert icon (on the Voyage 200 press [2nd][Y])


• Press [2nd][3] to access the UNITS menu (On Voyage 200 press [♦][P])
• Within the length menu, select _km
• Press [ENTER]

If an expression uses a combination of units, it is possible to specify a conversion for some of the units only. Any units for which a conversion is not specified will be displayed according to the defaults.


To convert a temperature value, the tmpCnv() function must be used instead of the conversion operator. For more information on the temperature units conversion, read the case entitled Inconsistent Units Error when performing temperature conversion.

Please refer to the TI-89 Family, TI-92 Family and Voyage 200 guidebooks for more information.