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: