Google Calculator

GOOGLE GUIDE		Quick Reference: Google Calculator (Cheat Sheet) by Nancy Blachman – nancy at googleguide.com (replace at with @)
Solve mathematical problems with Google's built-in calculator function. Simply enter the expression you'd like evaluated in Google's web search box and hit the ENTER key or click the "Google Search" button.
BASIC ARITHMETIC
OPERATOR		MEANING		TYPE INTO SEARCH BOX
+ or plus		addition		12 + 34 or three plus four
– or minus		subtraction		3.4 - 5.6 or five minus two
* or times		multiplication		56 * 7 or six times nine
/ or divided by		division		7 / 8 or ten divided by two
% of orpercent of		percentage of		45% of 39
mod or %		modulo (the remainder after division)		15 mod 9 or 15 % 9
^ or **		raise to a power		2^5 or 2**5
the nth root of		nth root		4th root of 16, sqrt(16), cube root of 109
reciprocal of		multiplicative inverse		reciprocal of 7
ADVANCED MATH
The following table lists some of the functions built into Google's calculator.
OPERATOR		FUNCTION		TYPE INTO SEARCH BOX
sin, cos, tan, sec, csc, cot		trig functions (arguments are assumed to be in radians)		cos(pi/3) cosine(pi/3)
arcsin, arccos, arctan, arccsc, etc.		inverse trigonometric functions		arccos(.5)
sinh, cosh, tanh, csch, arsinh, arccsch, etc.		hyperbolic functions		cosh(6)
ln		logarithm base e		ln(16)
log		logarithm base 10		log(16)
lg		logarithm base 2		lg(16)
exp		exponential function		exp(16)
!		factorial		5!
choose		x choose y calculates the number of ways of choosing a set of yelements from a set of x distinct elements		5 choose 3
CONSTANT		MEANING		TYPE INTO SEARCH BOX
e		base of the natural system of logarithms		e
pi		the ratio of the circumference to the diameter of a circle		pi/6
i		imaginary number, which represents one of the two square roots of -1		i^2
gamma		Euler's constant		e^gamma
TIPS (adapted from Google's Online Calculator Help)
Parentheses can be used whenever they'll serve to make complicated expressions unambiguous, and also sets of parentheses can be used within parentheses; don't use brackets for grouping.
You can force the calculator to try to evaluate an expression by putting an equals sign (=) after it. This works only if the expression is arithmetically computable. For example, 1-800-555-1234= will return a result, but 1/0= will not (because dividing a non-zero number by zero is undefined and not computable).
Parentheses can be used to enclose the parts of your expression that you want evaluated first. For example,(1+2)*3 causes the addition to happen before the multiplication.
Google's calculator automatically balances unclosed parentheses.
A missing operator within an expression may default to an *, e.g., 6cos(2pi).
Feel free to experiment with the calculator as not all of its capabilities are listed here.
UNITS OF MEASURE AND CONVERSIONS
Compute expressions involving different units. By default, units are converted to and results expressed in meter-kilogram-second (mks) units. Many units have both long and short names. Use whichever name you prefer.
TYPE OF UNITS		UNIT CONVERSION		EXAMPLES OF UNITS
		old units in new units
Currency (money)		23 USD in Euros		US Dollars (USD), Euros, Britain Pounds (GBP)
Mass		130 lbs in kg		kilogram or kg, grams or g, grains, pounds or lbs, carats, stones, tons, tonnes
Length		3 miles in km		meters or m, miles, feet, Angstroms, cubits, furlongs
Volume		three quarters of a cup in teaspoons		gallons, liters or l, bushels, teaspoons, pints
Area		2 acres in sq km		square kilometers, acres, hectares
Temperature		98.6 Fahrenheit in Celsius or 98.6 f in c		Celsius or c, Fahrenheit or f
Time		1 year in seconds		days, seconds or s, centuries, sidereal years, fortnights
Electricity		100 volts in picovolts		volts or v, picovolts, amps or a, ohms, henrys
Energy		160 lbs * 4000 ft in Calories		Calories, British thermal units (BTU), joules, ergs, foot-pounds (Warning: When your query includes "Calories" with a capital "C," Google returns kilocalories called "calories" by nutritionists.)
Power		1 hp in watts, 500 V * 3 A in KW		watt or W, kilowatts or KW, megawatts or MW, horsepower or HP
Angle		90 degrees in radians		degrees or radians
Information		2 bytes in bits		bits, bytes, kbytes
Quantity		1 great gross in dozens		dozen, baker's dozen, gross, great gross, score
Numbering Systems		1500 in hex 64 in binary LVII in decimal		decimal, hexadecimal or hex, octal, binary, roman numerals (Prefix hexadecimal numbers with 0x, octal numbers with 0o and binary numbers with 0b, e.g., 0x7f + 0b100101)
PHYSICAL CONSTANTS
The following table lists just a few of the many commonly used physical constants known to the calculator function.
SHORTHAND NOTATION		LONG NAME		CLICK LINK FOR AN APPROXIMATE VALUE
au		Astronomical Unit		au or astronomical unit
		Avogadro's number		Avogadro's number
k		Boltzmann constant		k or Boltzmann constant
		Faraday constant		Faraday constant
G		gravitational constant		G or gravitational constant
		magnetic flux quantum		magnetic flux quantum
		mass of a proton		mass of a proton
m_planet		mass of planet		m_Mars, m_Earth, m_Uranus, m_sun
		molar gas constant		molar gas constant
		permeability of free space		permeability of free space
h		Planck's constant		h or Planck's constant
r_planet		radius of planet		r_Earth, r_Pluto, r_sun
c		speed of light in a vacuum		c or speed of light
		speed of sound in air at sea level		speed of sound
		This reference is based on the Google Cheat Sheet with Google's permission. CCL 2005 Google Guide – Google Guide is neither affiliated with nor endorsed by Google. For copy & redistribution permission, visit Google Guide's Creative Commons License page.