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Royal 4HPD

Royal 4HPD
Image: Joe Haupt, CC BY-SA 2.0

The Royal 4HPD is an arithmetic calculator with 10 digits precision and algebraic logic. It has 10 functions, 30 keys, and an LCD (liquid crystal) display. The power source is 4xAA.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions10
Keys30
Precision10
LogicAlgebraic
Display typeLCD
PrinterYes
Length140mm
Width73mm
Thickness30mm
Power Source4xAA
Year introduced1981
Year discontinued1982

Replacements:

If you have a Royal 4HPD that is no longer working, you can first try replacing the 4xAA batteries. 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 Royal