Following on from our third part on Google Search Tips

Google Calculator Guide

+ - * / % ^

You can use Google as a calculator, using standard symbols, for example:

            3+2     returns 5
            4-1      returns 3
            6*8      returns 48
            15/5    returns 3
            3^2     returns 9 (3 to the power 2)

            5%2     returns 1 (the remainder after division)

sqrt,nth root ofx
sqrt(49) returns 7, if you need non-square roots you can use for example 3th root of 27.
sin, cos, arctan, tan…

Google calculator supports various trigonometic functions, expecting a radians value, that can be expressed also using the pi constant: sin(pi/2), tan (2/3*pi)

ln
returns natural (base e) logarithm: ln(e^5)

log
returns base 10 logarithm: log(100)

!
returns n factorial: 3!

Numbers can be entered also in hexadecimal, octal and binary base, using 0x, 0o and 0b prefixes, for example 5 +0xf+0b1001

Google Conversions Guide

Google supports a lot of conversion tools, here is a small guide:

in degrees / in radians
You can convert radians to degrees: pi/2 in degrees or convert degrees into radians: 90 degrees in radians

in hex / in binary / in octal / in decimal
You can convert to each of the given bases: 16 in hex , 16 in octal, 16 in binary, 0×11 in decimal
you can also use 2007 in roman numerals (in case you’re building a temple and you need to know how to write the year on it)

distance conversions
You can use 100miles in km , 1m in mm, but also 200000 km in light-second etc.
speed, time, temperature

just some samples:

            100mph in kph
            1 month in seconds
            280 kelvin in celsius
            50 fahrenheit in celsius

currency

            3 € in $ or 3 euros in dollars

cooking
This is classic:

            3 teaspoons in oz
            1 cup + 1 tablespoon in teaspoon

That's the last portion of the Google guide ... have fun ...

Needless to say, there is alot more that can be done in Google, and new options are discovered almost daily .... :-)