Did you know that you can use
Google as a calculator or converter from, say, metric to imperial units?
To use Google's
built-in calculator function, simply enter the calculation you'd like done into
the Google 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.
Examples of using Google Calculator for calculations & conversions
These sample queries
demonstrate the utility and power of this feature: