RetroCalculators - A Webzeum of Mechanical Calculators Ingenious

RetroCalculators

Wondrous Devices from the Age of Machines

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A Webzeum of Mechanical Calculators

What's New?

For BriCal enthusiasts, look at the new BriCal Model C page!:

Also new is the Romanculator Web App. :

Also see the The Abacus for neat photos and a video for the original retro calculator!

And check out the video for the ever-popular and Astounding Curta Calculator.

The Calculators

'Golden' Odhner	The Abacus Ancient Wonder	The Astounding Curta
G. Westinghouse & Co. Tallier (1870?)	Digicus (Abacus + Digital)	Pilot (Japan)
Aderes (Adix) Column Adder	Golden Gem	Charpentier Calculimetre
Brunsviga Midget	BriCal British Calculator	Bassett Adder
Victor (Webb) Adder	Naughty Boy Adder (Precise)	Otis King Slide Rule
Add-A-Mite	Pocket Cash Register	Add-O-Matic
Benton Tally Register	Faber Castell Addiator Slide Rule Hybrid	The Locke Adder
HexAdat (Hex Addiator)	Fowler Long Scale	Stephenson Adder
Calcumeter	Resulta BS 9	Soviet KL-1 Slide Rule
Ricoh Alexe	S&N	Burroughs 'High Heel'
Jorgensen Metric Conversion Rule	Tasco Pocket Arithmometer	Chadwick Adder
Ruxton Mechanical Pencil & Slide Rule	RomanCulator Web App	Quixsum Fractional Adding Machine
Tiger Calculator (Japan)	Midget Circular Slide Rule	Sundstrand Adding Machine
Prewett Addograf	Thales RechenMashine German Calculator	Accoson (British)
Friden C10	Times Table Calculators	Monroe 'mini' Model L
Micra	Fuller Adder	Contex Adder
Facit Model T-K Mechanical Calculator	Brical Model C	Swift Adding Machine
Shop-N-Add Shopping Index	Midget Adding Machine	Fractomator Addiator

(On many of the retro calculators pictured above, you can click to see more photos and information)

Other Sites of Interest for RetroCalculators:

The Vintage Calculators web museum of mechanical calculators.
The Early Office Museum: http://www.officemuseum.com/calculating_machines_adders.htm

A fantastic demonstration of various calculator mechanisms - click the photos for video.

For exhaustive indices and pictures:
In English (and German): http://www.rechenmaschinen-illustrated.com/
In Spanish: INDICE DE LAS MAQUINAS DE CALCULAR
In German: http://bluemich.net/rechner/index.htm
From D. B�lter, also in German: http://www.boelters.de/Rechenmaschinen/index.html
Adders in German: http://www.rechenwerkzeug.de/kleinadd.htm
Michel Bardel's list of mechanical machines since 1820: http://calcollect.free.fr/machines/macha.htm

Other collector's pages:
Fred's Mechanical Calculator's http://users.skynet.be/Fredscalculators/main.htm
JM Goldman: Good site for adders and mechanical calculators, arithmometers, comptometers

Below is a video of a clever adder made of wood and marbles (by Matthiaswandel):

Please add a comment to The Guestbook (say hello)!

RetroCalculators.com is most interested in smaller mechanical calculators and mechanical adders (not electric or solid-state), as well as unusually shaped slide rules. If you have something that might be of interest, please contact us.

Disclaimer and Thanks

This site is dedicated to celebrating the ingenuity of mechanical calculating devices of all varieties. Many of the photos appearing here were taken by me, but others came from ebay auctions or other varied sources. If some photo or other intellectual property of yours appears on this website without proper credit or permission, please know that I beg your pardon and am dedicated to correcting such errors and omissions as quickly as possible. I would be honored to give proper credit, or if necessary, honor-bound to remove any material that should not appear, per your instructions.

To all the owners of photos or mechanical calculating devices that appear on this site and elsewhere, my thanks for sharing these marvelously clever items with the web community.

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