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Royal Digital 5

The Royal Digital 5 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed. The calculator was manufactured in Japan for the Imperial Typewriter Company Limited (Leciester, England). This calculator can actually store up to 88 digits, although only 8 are visible. This allows the unit to be used to multiply large numbers using a crude form of floating point arithmetic. A further quirk of the logic is that trailing zeros are not suppressed and always visible.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Precision8
LogicAlgebraic
Display typeVFD
Length150mm
Width88mm
Thickness35mm
Power Source4xAA sealed
Year introduced1972
Year discontinued1972

Replacements:

If you have a Royal Digital 5 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 Royal