Google calculator

http://arunonfire.blogspot.com/2007/11/google-calculator.html

Calculator.

To use Google's built-in calculator function, simply enter the calculation you'd like done into the search box and hit the Enter key or click on the Google Search button.
The calculator can solve math problems involving basic arithmetic, more complicated math, units of measure and conversions, and physical constants.

5+2*2
2^20
sqrt(-4)

example:

((48 934 * 950) / 463) + 234 = 100 638.536


Unit conversion - very useful to us.

example:

27 919.211 kilobytes = 27.2648545 megabytes

half a cup in teaspoons
160 pounds * 4000 feet in Calories


Currency Conversion.
3.5 USD in GBP
currency of Brazil in Malaysian money
5 British pounds in South Korean money
2.2 USD per gallon in INR per litre
example:


5 U.S. dollars = 196.602705 Indian rupees


Definitions.
To see a definition for a word or phrase, simply type the word "define," then a space, and then the word(s) you want defined. If Google has seen a definition for the word or phrase on the Web, it will retrieve that information and display it at the top of your search results.
example:

You can also get a list of definitions by including the special operator "define:" with no space between it and the term you want defined.