Standard Prefixes
Prefix used in code Prefix for written unit Multiplier
da- deka- 10
h- hecto- 100
k- kilo- 1000
M- mega- 1e6
G- giga- 1e9
T- tera- 1e12
P- peta- 1e15
E- exa- 1e18
Z- zeta- 1e21
Y- yotta- 1e24
d- deci- 1e-1
c- centi- 1e-2
m- milli- 1e-3
mu- micro- 1e-6
n- nano- 1e-9
p- pico- 1e-12
f- femto- 1e-15
a- atto- 1e-18
z- zepto- 1e-21
y- yocto- 1e-24
Standard Units
Unit Symbol Definition Comments
Time
second sec 1 s
minute min 60 s
hour hr 60 min
hour hour 1 hr alternate symbol
hour h 1 hr alternate symbol
day day 24 hr
shake shake 10 ns
Hertz Hz 1 s^-1
Length or Distance
international foot ft 0.3048 m
inch in 1.0/12.0 ft
international mile mile 5280.0 ft
international mile mi 1 mile alternate symbol
milli-inch mil 0.001 in
Parsec pc 3.085678e16 m
League league 3 mile
Astronomical Unit ua 1.49598e11 m
Astronomical Unit AU 1.49598e11 m alternate symbol
yard yd 3 ft
Angstrom Ang 1e-10 m
Angstrom \\AA 1 Ang alternate symbol
furlong furlong 220 yd
fathom fathom 6 ft
Rod rd 16.5 ft
U.S. survey foot sft (1200./3937.) m
U.S. survey mile smi 5280 sft also called statue mile
point pt 1./72. in Typeface Point
pica pica 1./6. in Typeface Pica
Temperature
Celsius C 1 K -273.15
Rankine R 5.0/9.0 K
Fahrenheit F 1 R -459.67
Mass
gram g 0.001 kg This is case sensitive.
gram gm g (alternate symbol)
pound mass lbm 0.45359237 kg (avoirdupois)
Troy pound lbt 0.3732417 kg (apothecary)
carat (metric) carat 0.2 g
slug slug 1 lb sec^2/ft
snail snail 1 lb sec^2/in
Short Ton ton 2000 lbm
Long Ton ton_l 2240 lbm
Ounce oz 28.34952 g (avoirdupois)
Grain gr 64.79891 mg
Pennyweight dwt 1.55174 g
Force or Weight
Newton N 1 kg m/s^2
Dyne dyn 1e-5 N
pound force lb lbm G
pound force lbf lbm G
poundal poundal 1 lbm ft/sec^2
kilopound kip 1000 lbf
kilogram force kgf kg G
Energy
Joule J 1 N m
British Therm. Unit BTU 1055.056 J (International Table)
British Therm. Unit Btu 1 BTU alternate symbol
British Therm. Unit BTU_th 1054.350 J (Thermochemical)
calorie cal 4.1868 J (International Table)
calorie cal_th 4.184 J (Thermochemical)
Calorie Cal 4.1868 kJ (nutritionists)
electron volt eV 1.602177e-19 J
erg erg 1e-7 J
Ton of TNT TNT 4.184e9 J
Power
Watt W 1 J/s
Horse Power hp 550 ft lb/s
Pressure
bar bar 1e5 N/m^2
Pascal Pa 1 N/m^2
Pounds per sq. inch psi 1 lb/in^2
Pounds per sq. ft. psf 1 lb/ft^2
kilo psi ksi 1000.0 psi
atmospheres atm 1.01325e5 N/m^2
inches of Mercury inHg 3.387 kPa
millimeters Mercury mmHg 0.1333 kPa
Torr torr 1.333224 Pa
Volume or Area
Liter L 1/1000.0 m^3
gallon gal 3.785412 L
Pint (U.S. liquid) pint 1/8. gal
Quart (U.S. liquid) qt 2 pint
Pint (U.S. dry) dpint 0.5506105 L
Quart (U.S. dry) dqt 2 dpint
Acre acre 1/640.0 smi^2
Hectare ha 10000 m^2
Barrel (petroleum) barrel 158.9873 L
Fluid Ounce oz_fl 29.57353 mL
Gill (U.S.) gi 0.1182941 L
Peck (U.S.) pk 8.809768 L
Tablespoon tbl 1/32. pint
Teaspoon tsp 1/3. tbl
Cup cup 16. tbl
Electromagnetism
Coulomb Co 1 A s Electric Charge
Volt V 1 W/A Electric Potential
Ohm ohm 1 V/A Electric Resistance
Ohm \\Omega 1 V/A alternate symbol
Faraday faraday 96485.31 Co Electric Charge
Farad farad Co/V Capacitance
Stokes stokes 1e-4 m^2/s
Oersted Oe 79.57747 A/m
Webber Wb V s Magnetic flux
Tesla Tesla Wb/m^2 Magnetic flux density
Henry H Wb/A Inductance
Siemens S A/V Electrical Conductance
Light and Radiation
Lux lux cd/m^2 Iluminance
Lux lx cd/m^2
Lumen lm cd Luminous Flux
Stilb sb 10000 cd/m^2
Phot ph 10000 lx
Becquerel Bq s^-1 activity
Gray Gy J/kg Absorbed Dose, kerma
Sievert Sv J/kg Dose equivalent
Other Quantities
pound mole lbmole 1 mol lbm/g quantity
poise poise 1 g /sec cm viscosity
Gravity's accel. G 9.80665 m/sec^2 Gravity on Earth
Degree deg Pi/180 Can be used to convert from degrees to radians for trig functions.
Percent % 0.01
Knot knot 1852 m/hr velocity
Miles per Hour mph 1 mi/hr velocity
Gallon/minute gpm 1. gal/min flow rate
Revolution/minute rpm 360 deg/min
Prefix used in code Prefix for written unit Multiplier
da- deka- 10
h- hecto- 100
k- kilo- 1000
M- mega- 1e6
G- giga- 1e9
T- tera- 1e12
P- peta- 1e15
E- exa- 1e18
Z- zeta- 1e21
Y- yotta- 1e24
d- deci- 1e-1
c- centi- 1e-2
m- milli- 1e-3
mu- micro- 1e-6
n- nano- 1e-9
p- pico- 1e-12
f- femto- 1e-15
a- atto- 1e-18
z- zepto- 1e-21
y- yocto- 1e-24
Standard Units
Unit Symbol Definition Comments
Time
second sec 1 s
minute min 60 s
hour hr 60 min
hour hour 1 hr alternate symbol
hour h 1 hr alternate symbol
day day 24 hr
shake shake 10 ns
Hertz Hz 1 s^-1
Length or Distance
international foot ft 0.3048 m
inch in 1.0/12.0 ft
international mile mile 5280.0 ft
international mile mi 1 mile alternate symbol
milli-inch mil 0.001 in
Parsec pc 3.085678e16 m
League league 3 mile
Astronomical Unit ua 1.49598e11 m
Astronomical Unit AU 1.49598e11 m alternate symbol
yard yd 3 ft
Angstrom Ang 1e-10 m
Angstrom \\AA 1 Ang alternate symbol
furlong furlong 220 yd
fathom fathom 6 ft
Rod rd 16.5 ft
U.S. survey foot sft (1200./3937.) m
U.S. survey mile smi 5280 sft also called statue mile
point pt 1./72. in Typeface Point
pica pica 1./6. in Typeface Pica
Temperature
Celsius C 1 K -273.15
Rankine R 5.0/9.0 K
Fahrenheit F 1 R -459.67
Mass
gram g 0.001 kg This is case sensitive.
gram gm g (alternate symbol)
pound mass lbm 0.45359237 kg (avoirdupois)
Troy pound lbt 0.3732417 kg (apothecary)
carat (metric) carat 0.2 g
slug slug 1 lb sec^2/ft
snail snail 1 lb sec^2/in
Short Ton ton 2000 lbm
Long Ton ton_l 2240 lbm
Ounce oz 28.34952 g (avoirdupois)
Grain gr 64.79891 mg
Pennyweight dwt 1.55174 g
Force or Weight
Newton N 1 kg m/s^2
Dyne dyn 1e-5 N
pound force lb lbm G
pound force lbf lbm G
poundal poundal 1 lbm ft/sec^2
kilopound kip 1000 lbf
kilogram force kgf kg G
Energy
Joule J 1 N m
British Therm. Unit BTU 1055.056 J (International Table)
British Therm. Unit Btu 1 BTU alternate symbol
British Therm. Unit BTU_th 1054.350 J (Thermochemical)
calorie cal 4.1868 J (International Table)
calorie cal_th 4.184 J (Thermochemical)
Calorie Cal 4.1868 kJ (nutritionists)
electron volt eV 1.602177e-19 J
erg erg 1e-7 J
Ton of TNT TNT 4.184e9 J
Power
Watt W 1 J/s
Horse Power hp 550 ft lb/s
Pressure
bar bar 1e5 N/m^2
Pascal Pa 1 N/m^2
Pounds per sq. inch psi 1 lb/in^2
Pounds per sq. ft. psf 1 lb/ft^2
kilo psi ksi 1000.0 psi
atmospheres atm 1.01325e5 N/m^2
inches of Mercury inHg 3.387 kPa
millimeters Mercury mmHg 0.1333 kPa
Torr torr 1.333224 Pa
Volume or Area
Liter L 1/1000.0 m^3
gallon gal 3.785412 L
Pint (U.S. liquid) pint 1/8. gal
Quart (U.S. liquid) qt 2 pint
Pint (U.S. dry) dpint 0.5506105 L
Quart (U.S. dry) dqt 2 dpint
Acre acre 1/640.0 smi^2
Hectare ha 10000 m^2
Barrel (petroleum) barrel 158.9873 L
Fluid Ounce oz_fl 29.57353 mL
Gill (U.S.) gi 0.1182941 L
Peck (U.S.) pk 8.809768 L
Tablespoon tbl 1/32. pint
Teaspoon tsp 1/3. tbl
Cup cup 16. tbl
Electromagnetism
Coulomb Co 1 A s Electric Charge
Volt V 1 W/A Electric Potential
Ohm ohm 1 V/A Electric Resistance
Ohm \\Omega 1 V/A alternate symbol
Faraday faraday 96485.31 Co Electric Charge
Farad farad Co/V Capacitance
Stokes stokes 1e-4 m^2/s
Oersted Oe 79.57747 A/m
Webber Wb V s Magnetic flux
Tesla Tesla Wb/m^2 Magnetic flux density
Henry H Wb/A Inductance
Siemens S A/V Electrical Conductance
Light and Radiation
Lux lux cd/m^2 Iluminance
Lux lx cd/m^2
Lumen lm cd Luminous Flux
Stilb sb 10000 cd/m^2
Phot ph 10000 lx
Becquerel Bq s^-1 activity
Gray Gy J/kg Absorbed Dose, kerma
Sievert Sv J/kg Dose equivalent
Other Quantities
pound mole lbmole 1 mol lbm/g quantity
poise poise 1 g /sec cm viscosity
Gravity's accel. G 9.80665 m/sec^2 Gravity on Earth
Degree deg Pi/180 Can be used to convert from degrees to radians for trig functions.
Percent % 0.01
Knot knot 1852 m/hr velocity
Miles per Hour mph 1 mi/hr velocity
Gallon/minute gpm 1. gal/min flow rate
Revolution/minute rpm 360 deg/min
Know About It: -Random Facts Laws & Info-
Know About It: -Random Facts Laws & Info-: "Your body is creating and killing 15 million red blood cells per second! The king of hearts is the only king without a moustache on a st..."
-Random Facts Laws & Info-
Your body is creating and killing 15 million red blood cells per second!
The king of hearts is the only king without a moustache on a standard playing card!
There are no clocks in Las Vegas gambling casinos!
There is one slot machine in Las Vegas for every eight inhabitants!
The Mona Lisa has no eyebrows. It was the fashion in Renaissance Florence to shave them off!
Every day 20 banks are robbed. The average take is $2,500!
The most popular first name in the world is Muhammad!
Tablecloths were originally meant to be served as towels with which dinner guests could wipe their hands and faces after eating!
Tourists visiting Iceland should know that tipping at a restaurant is considered an insult!
One car out of every 230 made was stolen last year!
The names of Popeye's four nephews are Pipeye, Peepeye, Pupeye, and Poopeye!
Until the nineteenth century, solid blocks of tea were used as money in Siberia!
The Nobel Peace Prize medal depicts three naked men with their hands on each other's shoulders!
When glass breaks, the cracks move faster than 3,000 miles per hour. To photograph the event, a camera must shoot at a millionth of a second!
A Boeing 747 airliner holds 57,285 gallons of fuel!
A car uses 1.6 ounces of gas idling for one minute. Half an ounce is used to start the average automobile!
The Philadelphia mint produces 26 million pennies per day!
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
A violin contains about 70 separate pieces of wood!
It is estimated that 4 million "junk" telephone calls, phone solicitations by persons or programmed machine are made every day in the United States!
It takes glass one million years to decompose, which means it never wears out and can be recycled an infinite amount of times!
Forest fires move faster uphill than downhill!
Almost half the newspapers in the world are published in the United States and Canada!
The two-foot long bird called a Kea that lives in New Zealand likes to eat the strips of rubber around car windows!
Most lipstick contains fish scales!
Skepticisms is the longest word that alternates hands when typing!
One ragweed plant can release as many as one billion grains of pollen!
It's illegal to drink beer out of a bucket while you're sitting on a curb in St. Louis!
The first product to have a bar code was Wrigleys gum!
No piece of square dry paper can be folded more than 7 times in half!
A group of geese on the ground is a gaggle, a group of geese in the air is a skein!
Over 2500 left handed people a year are killed from using products made for right handed people!
There are more than 10 million bricks in the Empire State Building!
If you counted 24 hours a day, it would take 31,688 years to reach one trillion!
Taphephobia is the fear of being buried alive!
A crocodile always grows new teeth to replace the old teeth!
The sun is 330,330 times larger than the earth!
Clinophobia is the fear of beds!
A 'jiffy' is an actual unit of time for 1/100th of a second!
Porcupines float in water!
Pinocchio is Italian for "pine eye"!
The sentence "The quick brown fox jumps over a lazy dog." uses every letter of the alphabet!
The average life span of a major league baseball is 5-7 pitches!
The Mint once considered producing doughnut-shaped coins!
The only 15 letter word that can be spelled without repeating a letter is "uncopyrightable"!
The longest recorded flight of a chicken is 13 seconds!
The sloth (a mammal) moves so slowly that green algae can grow undisturbed on its fur!
Cat urine glows under a black-light!
The world's termites outweigh the world's humans 10 to 1!
The electric chair was invented by a dentist!
Windmills always turn counter-clockwise. Except for the windmills in Ireland!
A hedgehog's heart beats 300 times a minute on average!
Camels have three eyelids to protect themselves from blowing sand!
The placement of a donkey's eyes in its head enables it to see all four feet at all times!
Human teeth are almost as hard as rocks!
A mole can dig a tunnel 300 feet long in just one night!
Ancient Egyptians slept on pillows made of stone!
A hippo can open its mouth wide enough to fit a 4 foot tall child inside!
A quarter has 119 grooves on its edge, a dime has one less groove!
Hummingbirds can weigh less than a penny!!
Until 1796, there was a state in the United States called Franklin. Today it's known as Tennessee!
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
A cockroach can live several weeks with its head cut off - it dies from starvation!
Every time you lick a stamp, you're consuming 1/10 of a calorie!
The average person has over 1,460 dreams a year!
It's against the law to pawn your dentures in Las Vegas!
One in every 4 Americans has appeared on television!
The average American/Canadian will eat about 11.9 pounds of cereal per year!
It's against the law to burp, or sneeze in a certain church in Omaha, Nebraska!
you're born with 300 bones, but when you get to be an adult, you only have 206!
Human thigh bones are stronger than concrete!
Over 10,000 birds a year die from smashing into windows!
The state of Florida is bigger than England!
There are more than one million animal species on Earth!
In Natoma, Kansas, it's illegal to throw knives at men wearing striped suits
It was once against the law to have a pet dog in a city in Iceland!
Your heart beats over 100,000 times a day!
Thomas Edison, lightbulb inventor, was afraid of the dark!
In Texas, it's against the law for anyone to have a pair of pliers in his or her possession.
In Philadelphia, you can't put pretzels in bags based on an Act of 1760.
Alaska law says that you can't look at a moose from an airplane.
In Corpus Christie, Texas, it is illegal to raise alligators in your home.
In Miami, it is forbidden to imitate an animal.
It is against the law to mispronounce the name of the State of Arkansas in that State.
In Illinois, the law is that a car must be driven with the steering wheel.
California law prohibits a woman from driving a car while dressed in a housecoat.
In Memphis, Tennessee, a woman is not to drive a car unless a man warns approaching motorists or pedestrians by walking in front of the car that is being driven.
In Tennessee, it is against the law to drive a car while sleeping.
In New York, it is against the law for a blind person to drive an automobile.
In West Virginia, only babies can ride in a baby carriage.
In Georgia, it is against the law to slap a man on the back or front.
A barber is not to advertise prices in the State of Georgia.
In Louisiana, a bill was introduced years ago in the State House of Representatives that fixed a ceiling on haircuts for bald men of 25 cents.
In Oklahoma, no baseball team can hit the ball over the fence or out of a ballpark.
In Rochester, Michigan, the law is that anyone bathing in public must have the bathing suit inspected by a police officer !
In Kentucky, it's the law that a person must take a bath once a year.
In Utah, birds have the right of way on any public highway.
In Ohio, one must have a license to keep a bear.
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Most People think that The Canary Islands get their name from the birds canaries. Actually The Canary Islands in the Atlantic Ocean are named after dogs. Surprised :-) (The latin word for dog is "canis")
Did you know that the Thirty Years War lasted 30 years and the Hundred Years War lasted 116 years.( Probably historicans have some problems with mathematics) :-))
Russian people normally celebrate the October Revolution in November.
It cost 7 million dollars to build the Titanic and 200 million to make a film about it. Also The Titanic was the very first ship to use the SOS signal.
Famous Panama Hats produced in Ecuador and The official language of Brazil is Portuguese.
Did you know that Hair brush for camels is made of squirrel fur.
Batsalways turn left when exiting a cave and Roosters cannot crow if they cannot extend their necks.
Did you know that Dalmatians are born without black spots.
Chewing gum while peeling onions will keep you from crying.
Smokers need to sleed 1 hour longer than non smokers. (Hey, don't spent extra 1/23 of your life in bed. It's good reason to give up smoking!)
Do you know any interesting facts? I guess some general things from school like it's the only planet that we know have life. It's time to discover that you may know, or may not. :-)
Well, Most people don't know that the Earth really not round, it's actually slightly pear-shaped and weighs about 6,588,000,000,000 million tons.
The Earth is always traveling around the Sun with speed 10,6216 kilometre-per-hour. Earth also rotate pretty fast at 1600 kilometr-per-hour. Its orbit around the Sun approximatelly 938,891,289 km.
You probably know that Earth has 1 moon, but do you know that our plante has also 2 co-orbital satellites (asteroids). Scientiest call them 2002 AA29 and 3753 Cruithne.
Our planet is like a great magnet that have poles at the top and bottom, located near geographic poles. It create a powerful magnetic field called "the magnetosphere". It protect the Earth from big amount of solar winds and radiation. So we should be really gratefull for such protection.
Actually it doesn’t take 24 hours to Earth rotate on its axis. The real amount of time is 23 hours, 56 mun and 4 sec. That mean that our day is actually 4 minutes shorter that we normally think it is. And a year on our planet isn't 365 days, but actually 365.25 days. Here's the reason why we add on an extra day in February.
In Florida any unmarried women can be arrested for parachuting on Sunday, and you must pay parking fee if you will tie your elephant to a parking meter. ( As it would be a vehicle ).
In Chicago (Illinois), it is illegal to take a French poodle to the Opera house and it's illegal for anyone to offer lighted cigars or whiskey to domestic animals like dogs or cats.
In Cicero (Illinois) humming on public streets is prohibited on Sundays and in Evanston bowling is forbidden.
In Indiana bathing is not allowed during the winter period and all monkey's are forbidden to smoke cigarettes. (How about cigars?)...
Dumb State Laws and Interesting Facts
In Iowa You can's kiss any longer than 5 minutes.
In Kentucky it's illegal to transport an ice cream in your pocket and anyone who has been drinking considered to be "sober" until he/she "cannot hold onto the ground."
In Louisana it's illegal to rob a bank and then shoot at the bank teller with a water pistol. Also biting someone with your natural teeth will be considered as "simple assault," while biting someone with your false teeth is "aggravated assault." In Massachusetts snoring is not allowed unless all bedroom windows are securely locked and mourners at a wake can not eat more than 3 sandwiches. Also in 1659, the Massachusetts state outlawed Christmas.
Every man in Brainerd (Minnesota) is required by law to grow a beard and it's illegal to sleep naked. Also in Minnesota it's illegal to stand around any building without a good reason.A nd citizens not allowed enter Wisconsin with a chicken on their head.
In Michigan under law, dentists are officially classified as "mechanics." Also by law woman's hair legally belongs to her husband.
Dumb State Laws and Interesting Facts
In Montana wife are not allowed to open her husbands mail and it is illegal to drive a car with ice picks attached to the wheels.
In Nebraska it's illegal for a mother to give her daughter a perm without a state license.
In New Mexico anyone can vote except idiots and insane person and You may not carry a lunchbox down Main Street. Also It’s forbidden for a female to appear unshaven in public and persons may not spit on the steps of the opera.
In New York women may go topless in public, if it is not being used as a businessIt and is illegal for a woman to be on the street wearing “body hugging clothing”.
The penalty for jumping off a building in New York is death. It is illegal to throw a ball at someone’s head for fun. Also you may not walk around on Sundays with an ice cream in the pocket.
In North Carolina it's illegal to make love on the floor of a hotel room between two beds. In Oklahoma You can be fined or even jailed for making "ugly faces" at dogs.
In Columbus (Ohio), it is illegal for stores to sell corn flakes on Sunday. And in Oxford (Ohio), it is illegal for a woman to undress in front of a man's picture.
When a giraffe's baby is born it falls from a height of 3 meters, normally without being hurt.
Cockroaches have a high tolerance to radiation and are the most likely creature to survive a nuclear war.
Pigs and Humans are the only creatures that get sunburnt.
Fleas can jump 80 times their own height and 150 times their own length.
Did you know that The shark is immune to all known diseases? And shark's skellington is made o cartilage - it has no bones.
The average slug can stretch itself out to 11 times its body length.
Snails can sleep for three years without eating. Also snakes hear through their jaws.
The elephant is the only animal with four knees.
An albatross can fly all day and not flap its wings once.
A duck's quack doesn't echo, and nobody knows why.
Rabbits have been known to reach a speed of 44 mph.
A chamois goat can balance on a point of rock the size of small coin.
Cows and horses sleep standing up.
All domestic cats hate lemons, or any citrus scent of any kind.
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