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Casio PERSONAL M-1 (H-813)

Casio PERSONAL M-1
Image: Joe Haupt, CC BY-SA 2.0

The Casio PERSONAL M-1 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 21 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA. The calculator was manufactured in Japan.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions6
Keys21
Precision8
LogicAlgebraic
Display typeVFD
Length124mm
Width75mm
Thickness22mm
Weight82g
Power Consumption0.200000W
Power Source2xAA
CountryJapan
Year introduced1976
Year discontinued1986

Replacements:

If you have a Casio PERSONAL M-1 that is no longer working, you can first try replacing the 2xAA 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 Casio