Google Chrome can perform calculations directly from the address bar. It can convert distance, temperature, perform arithmetic functions and so on.
To know how many kilometers from a specific number of miles :
To convert a km in miles :
To find the square root of a number :
To convert temperature from Fahrenheit to Celsius or vice versa :
To find a square of any number :
The auto suggest options will find the answer to most of the desired calculations.
This is a useful feature to work with without actually using a calculator app.
Happy calculating.