Ask questions to Google ...

If you type "google calculator" in the search field a online calculator appears. But there is also another hidden calculator in the search bar it provides and direct response when asked a conversion or a mathematical operation.

Simple example ...

Enter this formula in the Google search bar:

    10 x 2 

In the first line of displayed results, you find the solution! And the calculator is displayed too.

In case you want to convert measurements ...

Type:

    45 miles in km 

At the top of results you now:

45 miles = 72.42048 kilometers

But if you type:

    45 miles km 

... you get ordinary results... Because there is a shell hidden behind these calculations and it does require well-defined keywords ...

Nevertheless, the interpreter seems to know when you go to it, as in its documentation, Google gives examples of various formulas that can produce a result:

• Convert 2 meters in feet
• 3 minutes into second.
• How many months in 4 years?

When it is clear that the text entered is a mathematical formula, the engine can even display a graph, like for sin(x)+1/3 sin(2x)+1/4 sin(3x) for example:

But we will turn instead to Wolfram Alpha to display graphs of formulas as its possibilities are much broader and 3D figures obtained also more elaborate.

Other functions are hidden in the search bar, including translate and about. The keyword translate can make translations between human languages.
Another example, during the Olympics could have the number of medals for a country by typing "country name Olympic."

See also...

• Google Earth. Earth also includes two hidden tools: a simple driving simulator and a flight simulator.
• about: plugins (list of installed plugins). In Chrome, the word about may be followed by all that we want to test it in the browser: Other examples: about: memory (compared use of memory by Chrome and other browsers), about: cache ( list pages in memory).