In addition to providing easy access to billions of web pages, Google has many special features to help you to find exactly what you’re looking for.

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. Try one of the sample expressions below.

• 5+2*2
• 2^20
• sqrt(-4)
• half a cup in teaspoons
• 160 pounds * 4000 feet in Calories

Click here for full list of instructions : http://www.google.com/help/calculator.html

Currency Conversion
To use Google’s built-in currency converter, simply enter the conversion you’d like done into the Google search box and hit “Enter” or click the Google Search button

Here are some sample queries:

• 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

Google may return some search results that include variations of your search words, such as synonyms and plurals. Google may also omit common words and characters such as a, the, how, and other digits and letters which may slow down your search without improving the results. You’ll get indication if a word has been excluded or modified by displaying details on the results page below the search box.

If a word is essential to getting the results you want, or if you want to ensure a word is included exactly as you enter it, add a “+” sign immediately in front of it in the search box. (Be sure to also include a space between the “+” sign and any other words in your search.)

For example, here’s how to ensure that Google includes the “I” in a search for Star Wars, Episode I:

” Star Wars Episode +I “

( Ignore “” )

Synonym search

If you want to search not only for your search term but also for its synonyms, place the tilde sign (”~”) immediately in front of your search term.

For example, here’s how to search for food facts and nutrition and cooking information:

” ~food ~facts “

( Ignore “” )

“OR” search

To find pages that include either of two search terms, add an uppercase OR between the terms.F or example, here’s how to search for a vacation in either London or Paris:

” vacation london OR paris “

( Ignore “” )

Domain search

You can use Google to search only within one specific website by entering the search terms you’re looking for, followed by the word “site” and a colon followed by the domain name.

For example, here’s how you’d find admission information on the Stanford University site:

” admission site:www.stanford.edu “

( Ignore “” )

Numrange search

Feel like a number? Numrange searches for results containing numbers in a given range. Just add two numbers, separated by two periods, with no spaces, into the search box along with your search terms. You can use Numrange to set ranges for everything from dates ( Willie Mays 1950..1960) to weights ( 5000..10000 kg truck). But be sure to specify a unit of measurement or some other indicator of what the number range represents.

For example, here’s how you’d search for a DVD player that costs between $50 and $100:

” DVD player $50..$100 “

( Ignore “” )