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Hewlett-Packard HP 81 (Classic)

The Hewlett-Packard HP 81 is a finance calculator with 12 digits precision and RPN (reverse polish notation) logic. It has 11 functions, 43 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is Mains. Note: Desktop printer version of HP-80

Facts at a glance:

FeatureValue
TypeFinance
Functions11
Keys43
Precision12
LogicRPN
Display typeLED
PrinterYes
Length390mm
Width275mm
Thickness137mm
Weight6000g
Power SourceMains
Year introduced1973
Year discontinued1978

Replacements:

If you have a Hewlett-Packard HP 81 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Hewlett-Packard