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Hewlett-Packard HP 45 (Classic WIZARD)

Hewlett-Packard HP 45
Image: Mark Bollman, used with permission

The Hewlett-Packard HP 45 is a scientific calculator with 12 digits precision and RPN (reverse polish notation) logic. It has 56 functions, 35 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xAA.

Facts at a glance:

FeatureValue
TypeScientific
Functions56
Keys35
Precision12
LogicRPN
Display typeLED
Length147mm
Width81mm
Thickness33mm
Weight255g
Power Source3xAA
Year introduced1973
Year discontinued1976

Replacements:

If you have a Hewlett-Packard HP 45 that is no longer working, you can first try replacing the 3xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement:

See other calculators by Hewlett-Packard