calculator.org

the calculator home page

Royal 861 (MINI CARD 861)

The Royal 861 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 24 keys, and an LCD (liquid crystal) display. The power source is 2x1.5V cell.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions6
Keys24
Precision8
LogicAlgebraic
Display typeLCD
Length55mm
Width85mm
Power Source2x1.5V cell
Year introduced1980
Year discontinued1980

Replacements:

If you have a Royal 861 that is no longer working, you can first try replacing the 2x1.5V cell 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