Periodic Table | Polyatomic Ions | Assignments
EQUIVALENTS
LENGTHS
     1 centimeter............................ 0.3937 inch
     1 fathom.................................... 6 feet
     1 league.................................... 3 miles
     1 furlong................................... 660 feet.................... 1/8 mile
     1 inch......................................... 2.54 centimeters
     1 meter...................................... 39.37 inches
     1 mil............................................ 0.001 inch................ 0.0254 millimeters
     1 statute mile.......................... 5280 feet.................. 1.609 kilometers
     1 nautical mile........................ 6076.11 feet
     1 rod.......................................... 16.5 feet................... 5.029 meters
     1 yard........................................ 0.9144 meters
     1 angstrom.............................. 0.1 nanometer
VOLUMES
     1 barrel (crude oil) ................ 42 gallons
     1 barrel (liquor) ...................... 31 gallons
     1 standard barrel .................. 3.281 bushels
     1 bushel ................................... 35.239 liters ........... 4 pecks
     1 cord firewood ..................... 128 cubic feet ....... 2 ricks firewood
     1 U.S. gallon ........................... 3.785 liters .............. 8.34 pounds of water
     1 peck ...................................... 8.810 liters .............. 0.25 bushels
     1 U.S. fluid ounce .................. 29.573 milliliters
     1 quart liquid .......................... 0.946 liters .............. 2 pints
     1 tablespoon ......................... 3 teaspoons ......... 0.5 fluid ounce
     1 teaspoon ............................. 1/3 tablespoon ..... 4.93 milliliters
     1 cup ......................................... 8 fluid ounces........ 0.5 pints
     1 cubic foot ............................ 7.43 gallons ........... 62.9 pounds water
     1 liter ......................................... 1 dm3........................ 1 kg water
WEIGHTS
     1 bale of cotton ..................... 500 pounds
     1 carat ...................................... 200 milligrams
     1 grain ...................................... 64.799 milligrams
     1 gram ...................................... 15.432 grains
     1 dry ounce ............................ 28.350 grams
     1 ton .......................................... 2,000 pounds
     1 pound ................................... 453.592 grams
     1 kilogram ............................... 2.205 pounds
AMOUNTS
     1 mole ...................................... 6.02 X 1023
     1 gross .................................... 144
     1 bunch ...................................  10 
     1 calorie .................................. 4.18 joule
     1 AMU .......................................  1.662 X 10-24 gram
     1 electron (mass) ................. 5.486 X 10-4 AMU
     1 proton (mass) .................... 1.0073 AMU
     1 neutron (mass) .................. 1.0087 AMU
     light speed (vacuum) .......... 2.99 X 108 m/s
     sound speed (air@20oC) ... 343 m/s

 NUMBERS

NUMBERS GREATER THAN ONE

 PREFIX 
 SYMBOL 
 MULTIPLES  EQUIVALENT
anton
A
(10100)100
antonplex
-
-
(1010)100
googolplex
-
-
10100
googol
Yotta
Y
1024
heptillion
zetta
Z
1021
hexillion
exa E 1018 quintillionfold
peta P 1015 quadrillionfold
tera T 1012 trillionfold
giga G 109 billionfold
mega M 106 millionfold
kilo k 103 thousandfold
hecto h 102 hundredfold
deka dk,da 101 tenfold

NUMBERS LESS THAN ONE
deci d 10-1 tenth
centi c 10-2 hundredth
milli m 10-3 thousandth
micro µ (mu) 10-6 millionth
nano n 10-9 billionth
pico p 10-12 trillionth
femto f 10-15 quadrillionth
atto a 10-18 quintillionth
zepto
z
10-21
hexillionth
yocto
y
10-24
heptillionth

 
 
GIANT NUMBERS
ROMAN NUMERALS

Designation		 Number
of Zeros
million 6
billion 9
trillion 12
quadrillion 15
quintillion 18
sextillion 21
septillion 24
octillion 27
nonillion 30
decillion 33
 
I 1 XI 11 CD 400
II 2 XII 12 D 500
III 3 XIII 13 M 1,000
IV 4 XIV 14
V 5 XV 15
VI 6 XVI 16
VII 7 XVII 17
VIII 8 XVIII 18
IX 9 XIX 19
X 10 XX 20

TEMPERATURE CONVERSIONS
(Celsius, Fahrenheit, Kelvin, Rankine)