calculator.org

the calculator home page

Rockwell 51R (CONVERTER)

The Rockwell 51R is an arithmetic calculator with 8 digits precision and algebraic logic. It has 20 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed. Note: Metric conversions

Facts at a glance:

FeatureValue
TypeArithmetic
Keys20
Precision8
LogicAlgebraic
Display typeVFD
Length157mm
Width84mm
Thickness28mm
Weight270g
Power Source4xAA sealed
Year introduced1974
Year discontinued1974

Replacements:

If you have a Rockwell 51R that is no longer working, you can first try replacing the 4xAA sealed 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 Rockwell