[https://www.youtube.com/watch?v=443B6f_4n6k](Vide...  ...rg-Facit manufactured the Facit ESA-01 mechanical calculator . It can multiply 8 and 9-digit numbers and produc...

This is simple. Just enter your annual income, and...  ...d what country you are in, and the Davos2014 Wage Calculator from CNN will let you know how you stack up again...

When calculators became cheap in the 1970s, millions of kids disco...

The world population is expected to reach seve...  ...the next few days. Wonder what number you are? A calculator from the BBC helps you find out approximately whe...

Crazy Calculator | $8.95 Have you heard about the Crazy Calculator , the calculator that hates math? It's both a prank calculator and a real calculator ! When your friends are around, use it in prank m...

If I lived on Neptune I would be less than a N...  ...tune year old, how old would you be?  This nifty calculator allows you to figure out your “age” on differ...

Practical it is not, but this gadget sure is nifty...  ...t, but this gadget sure is nifty! The Hydro Power Calculator ($9.95) is powered by water - all you have to do...

(YouTube Link) Retro Calculators is a web museum of mechanical calculating devices...

The Inverse Graphing Calculator takes words and converts them into equations that...  ...express them graphically: The Inverse Graphing Calculator (version beta-1) is like a backwards graphing calculator . Normally, you enter an equation into your *strong class="matched...

The beautiful Casio Databank 2888JA over at Tokyof...  ...) The cheaper yet still geeky chic Cal-Q-Tek 2000 Calculator Watch at the Neatorama Shop - $14.95I have a soft...  ...o Databank 2888JA - Thanks Paul! | Cal-Q-Tek 2000 Calculator Watch