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Texas Instruments TI-31

Texas Instruments TI-31
Image: Mark Bollman, used with permission

The Texas Instruments TI-31 is a finance calculator with 8 digits precision and algebraic logic. It has 33 functions, 40 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is PP3 9V. The calculator was manufactured in Italy. Note: TI Money Manager

Facts at a glance:

FeatureValue
TypeFinance
Functions33
Keys40
Precision8
LogicAlgebraic
Display typeLED
Length145mm
Width80mm
Thickness33mm
Power SourcePP3 9V
CountryItaly
Year introduced1977
Year discontinued1986

Replacements:

If you have a Texas Instruments TI-31 that is no longer working, you can first try replacing the PP3 9V battery. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Texas Instruments