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• 1 meter = 1000 millimeters

• 1 meter = 100 centimeters

• 1 meter = 10 decimeters

• 1 decameter = 10 meters

• 1 hectometer = 100 meters

• 1 kilometer = 1000 meters
  

• 1 liter = 1000 milliliters

• 1 liter = 100 centiliters

• 1 liter = 10 deciliters

• 1 decaliter = 10 liters

• 1 hectoliter = 100 liters

• 1 kiloliter = 1000 liters
  

• 1 gram = 1000 milligrams

• 1 gram = 100 centigrams

• 1 gram = 10 decigrams

• 1 decagram = 10 grams

• 1 hectogram = 100 grams

• 1 kilogram = 1000 grams
  

• 60 seconds = 1 minute

• 60 minutes = 1 hour

• 24 hours = 1 day

• 7 days = 1 week

• 30 days = 1 calendar month

• 12 months = 1 year

• 365 days = 1 common year

• 366 days = 1 leap year

• 100 years = 1 century
  

• 2 pints = 1 quart

• 8 quarts = 1 peck

• 4 pecks = 1 bushel

• 1 cord = 128 cubic feet
  

• 4 gills = 1 pint

• 2 pints = 1 quart

• 4 quarts = 1 gallon

• 31.5 gallons = 1 barrel

• 2 barrels = 1 hogshead
  

• 24 sheets = 1 quire

• 20 quires = 1 ream

• 10 reams = 1 bale
  

• 12 inches = 1 foot

• 3 feet = 1 yard

• 16.5 feet (5.5 yards) = 1 rod

• 660 feet = 1 furlong

• 320 rods (5280 feet) = 1 mile
  

• 12 units = 1 dozen

• 12 dozen = 1 gross

• 12 gross = 1 great gross

• 20 units = 1 score

• 1 hand = 4 inches

• 1 fathom = 6 feet

• 1 nautical mile = 6076 feet

• 3 nautical miles = 1 league

• 1 bushel of potatoes = 60 pounds

• 1 barrel of flour = 196 pounds

• 1 cubic foot of water (7.48 gallons) = 62.425 pounds

• Diameter of circle times 3.1416 = circumference

• Diameter of circle squared times 0.7854 = area

• Atmospheric pressure at sea level = 14.7 pounds per square inch

• 13.5 cubic feet of air = 1 pound
  

• 1728 cubic inches = 1 cubic foot

• 27 cubic feet = 1 cubic yard

• 128 cubic feet = 1 cord of wood

• 24.75 cubic feet = 1 perch of stone

• NOTE: A cord of wood is is a pile 8 feet long, 4 feet wide, and 4 feet high. A perch of stone or brick is 16.5 feet long, 1.5 feet wide, and 1 foot high.
  

• 16 drams = 1 ounce

• 16 ounces = 1 pound

• 100 pounds = 1 hundredweight

• 2000 pounds = 1 ton

• 2240 pounds = 1 long ton
  

• 24 grains = 1 pennyweight

• 20 pennyweights = 1 ounce

• 12 ounces = 1 pound
  

• 60 seconds = 1 minute

• 60 minutes = 1 degree

• 360 degrees = 1 circumference

• 1 degree of the Earth's surface (1 meridian) = 69.16 miles at the equator
  

• 20 grains = 1 scruple

• 3 scruples = 1 dram

• 8 drams = 1 ounce

• 12 ounces = 1 pound
  

• 144 square inches = 1 square foot

• 9 square feet = 1 square yard

• 30.25 square yards = 1 square rod

• 160 square rods = 1 acre

• 640 acres = 1 square mile

• 1 acre = 208.71 feet on each side

• 1 section of land = 1 square mile

• 1/4 section = 160 acres

• 1 township = 36 square miles
  

• 1 micrometer (micron) = one millionth meter

• 1 nanometer = one billionth meter

• 1 angstrom = one ten-billionth meter

• 1 mole = number of atoms in 12 grams of carbon-12
  

• 1 astronomical unit = 93 million miles = 150 million kilometers

• 1 light-year = 63225.80645 astronomical units = 5.88 trillion miles = 9.46 trillion kilometers

• 1 parsec = 3.26 light-years = 19.1688 trillion miles = 30.8396 trillion kilometers

• NOTE: An astronomical unit (AU) is the distance between the Earth and the Sun. A light-year is the distance travelled by a photon, in vacuum, in one year. A parsec is a distance having a PARallax of one SECond of arc, as measured from diametrically opposite points along the Earth's orbit. Try not to fall off the end of these figures.
  

LINEAR MEASURE CONVERSION

• 1 meter = 1.093 yards = 39.37 inches
• 1 yard = 0.914 meters = 36 inches
• 1 centimeter = 0.394 inches = 0.0328 feet
• 1 inch = 2.54 centimeters = 1/12 foot
• 1 foot = 30.48 centimeters = 12 inches
• 1 kilometer = 0.621 miles
• 1 mile = 1.609 kilometers
  

• 1 liter = 2.113 pints = 1.057 quarts = 0.264 gallons

• 1 pint = 0.473 liters = 1/2 quart = 1/8 gallon

• 1 quart = 0.946 liters = 2 pints = 1/4 gallon

• 1 gallon = 3.785 liters = 8 pints = 4 quarts
  

• 1 liter = 1.761 pints = 0.881 quarts = 0.220 gallons

• 1 pint = 0.568 liters = 1/2 quart = 1/8 gallon

• 1 quart = 1.136 liters = 2 pints = 1/4 gallon

• 1 gallon = 4.544 liters = 8 pints = 4 quarts
  

• 1 gram = 0.035 ounces = 0.002 pounds

• 1 ounce = 28.35 grams = 1/16 pound

• 1 pound = 453.59 grams = 16 ounces

• 1 kilogram = 35.274 ounces = 2.205 pounds

• 1 ounce = 0.028 kilograms = 1/16 pound

• 1 pound = 0.454 kilograms = 16 ounces

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