calculator.org

the calculator home page

Hitachi KK221B

The Hitachi KK221B is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 20 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed. Note: Singer Friden 1200

Facts at a glance:

FeatureValue
TypeArithmetic
Functions6
Keys20
Precision8
LogicAlgebraic
Display typeVFD
Length170mm
Width113mm
Thickness40mm
Weight472g
Power Source4xAA sealed
Year introduced1975

Replacements:

If you have a Hitachi KK221B 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 Hitachi