Google has a neat calculator built into its search box. There is a good summary here:(adsbygoogle = window.adsbygoogle || []).push({});

http://www.google.com/help/calculator.html

Copy and paste the following queries to see it work:

Arithmetic operations:

sqrt((3*6/9)^2+7!)

Transcendental:

3*sin( 54 degrees )

2*log ( e / pi )

Complex numbers:

(3+7i)*(6-2i)

Unit conversions:

12 miles in kilometers

2400 joules in btu

34 degrees in radians

And now, the coolest part: physics calculations with universal constants and automatic units manipulation:

1 cm^2 * 15 feet per second in gallons per hour

1 kg * speed of light ^2

1/sqrt( permeability of free space * permittivity of free space )

sqrt( 2e-7 N/m * 2*pi * 1 m / permeability of free space )

( ( gravitational constant * earth mass / ( 2*pi / day )^2 )^(1/3) - radius of earth ) in miles

I know there are other tools out there that do this sort of thing (such as my TI-89), but having it on Google makes fun and easy to use for quick calculations.

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# Calculators Google calculator with units

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