Calculating - Decimeter
Back
Next
Sections
Museum Hold Tight! Photos
Walking Weather
Acorn Commodore Sinclair PCN
Calculating
Calculating
Introduction
In The Hand
Addiator
Addmaster
Arithma
Decimeter
Exactus
Reckoner
Addipresto
Bri Cal
Brunsviga
Contex A
Contex B
Olivetti 15 £sd
Olivetti 20 £sd
Olivetti Decimal
Plus
Victor
 
For an explanation of £sd money
see the Money page
 
 
 
 
 
Decimeter
Model    
Maker    
Origin    
Date   c. 1970
Serial    
 
A pocket calculator to convert between the old sterling money (£sd) and the new decimal currency (pounds and pence). The result is rounded to the nearest half new penny.
 
By turning the shillings and pence dials to the required amount, it gives the result in (rounded) new pence in tens and units. The example here shows 17 shillings and six pence as 85 + 2½ which is 87½ pence.
 
A lot of similar converters were around for a short time in 1971 when the UK changed currencies. They were useful for people who wanted to compare shop prices. The Decimal Currency Board also issued a printed "Shoppers' table".
 
It had been expected that there would be a long period where both sets of prices would be displayed, but in fact the changeover was quite quick.
 
Shopper's table
 
Top of the Page