Lanpher Associates, Inc., Interesting Stuff

Surveyor's measure:

• 1 mile = 8 furlongs = 80 chains = 1760 yards = 5280 feet
• 1 furlong = 10 chains = 40 rods = 220 yards = 660 feet
• 1 chain = 4 rods = 22 yards = 66 feet = 100 links
• 1 rod = 5.5 yards = 16.5 feet = 25 links
• 1 link = 7.92 inches

  Nautical measure:

• 1 fathom = 2 yards = 6 feet
• 1 league = 3 nautical miles
• 1 nautical mile = 6076.10 feet = 1 minute at the equator (that's where it comes from!)
• circumference of the earth = 21, 600 nautical miles = 24,856.8 statute miles

  Square measure:

• 1 square mile = 640 arcres = 6400 square chains
• 1 acre = 10 square chains = 4840 square yards = 43,560 square feet
  = a square with 208.7 foot sides = approximately 90% of a football playing field

  Measures used for diameters and areas for wire

• 1 circular inch = 1" diameter circle = 0.7854 square inches = 1,000,000 circular mils
• 1 square inch = 1.2732 circular inches =1,273,239 circular mils
• a circular mil is the area of a circle 0.001 inch in diameter

  Cubic Measure:

• 1 cord of wood = 4' x 4' x 8' = 128 cubic feet
• 1 perch of masonry = 16.5' x 1.5' x 1' = 24.75 cubic feet

  Liquid Measure:

• 1 U.S. gallon = 0.13737 cubic foot = 231 cubic inches = 4 quarts
• 1 quart = 2 pints = 8 gills
• 1 British Imperial gallon = 1.2009 U.S. gallon = 277.42 cubic inches
• 1 cubic foot = 7.48 U.S. gallons
• 1 barrel = 31.5 gallons

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