Weight and Measures

Measures of Length

1 mile = 1760 yards = 5280 feet

1 yard = 3 feet = 36 inches 1 foot = 12 inches

1 mil=0.001 inch

1 fathom = 2 yards = 6 feet 1 rod = 5.5 yards = 16.5 feet.

1 hand = 4 inches 1 span = 9 inches

1 micro-inch = one millionth inch or 0.000001 inch (1 micrometer or micron one millionth meter = 0.00003937 inch.)

Surveyor's Measure

1 mile = 8 furlongs = 80 chains

1 furlong = 10 chains = 220 yards

1 chain=4 rods = 22 yards = 66 feet = 100 links

1 link = 7.92 inches

Nautical Measure

1 league = 3 nautical miles

1 nautical mile = 6076.11549 feet = 1.1508 statute miles

1 knot = nautical unit of speed = 1 nautical mile per hour

One degree at the equator = 60 nautical miles = 69.047 statute miles 360 degrees = 21,600 nautical miles = 24,856.8 statute miles = circumference at equator

Square Measure

1 square mile = 640 acres = 6400 square chains

1 acre = 10 square chains = 4840 square yards = 43,560 square feet. An acre is equal to a square, the side of which is 208.7 feet.

1 square chain = 16 square rods = 484 square yards = 4356 square feet.

1 square rod = 30.25 square yards = 272.25 square feet = 625 square links

1 square yard = 9 square feet

1 square foot = 144 square inches

Measure used for Diameters and Areas of Electric Wires

1 circular inch = area of circle 1 inch in diameter = 0.7854 square inch

1 circular inch = 1,000,000 circular mils

1 square inch = 1.2732 circular inch = 1,273,239 circular mils

1 circular mil = the area of a circle 0.001 inch in diameter

Cubic Measure

1 cubic yard = 27 cubic feet

1 cubic foot = 1728 cubic inches

The following measures are also used for wood and masonry:

1 cord of wood = 4 × 4 × 8 feet = 128 cubic feet

1 perch of masonry = 16-1⁄2 × 1-1⁄2 × 1 foot = 24-3⁄4 cubic feet

Shipping Measure

For measuring entire internal capacity of a vessel:

1 register ton = 100 cubic feet

For measurement of cargo:

Approximately 40 cubic feet of merchandise is considered a shipping ton, unless that bulk would weigh more than 2000 pounds, in which case the freight charge may be based upon weight

40 cubic feet = 32.143 U.S. bushels = 31.16 Imperial bushels

Dry Measure

1 bushel = 1.2445 cubic feet = 2150.42 cubic inches

(U.S. or Winchester struck bushel)

1 bushel = 4 pecks = 32 quarts = 64 pints

1 peck = 8 quarts = 16 pints

1 quart=2 pints

1 heaped bushel = 11⁄4 struck bushel

1 cubic foot = 0.8036 struck bushel

1 British Imperial bushel = 8 Imperial gallons = 1.2837 cubic feet = 2218.19 cubic inches

Liquid Measure

1 U.S. gallon = 0.1337 cubic foot = 231 cubic inches = 4 quarts = 8 pints

1 quart=2 pints = 8 gills 1 pint=4 gills

1 British Imperial gallon = 1.2009

1 U.S. gallon = 277.42 cubic inches 1 cubic foot =7.48 U.S. gallons

Old Liquid Measure

1 barrel = 311⁄2 gallons 1 hogshead = 2 barrels = 63 gallons

1 pipe or butt = 2 hogsheads = 4 barrels = 126 gallons

1 tierce = 42 gallons 1 puncheon = 2 tierces = 84 gallons

1 tun=2 pipes = 3 puncheons

Apothecaries' Fluid Measure

1 U.S. fluid ounce = 8 drachms = 1.805 cubic inch = 1⁄128 U.S. gallon

1 fluid drachm = 60 minims

1 British fluid ounce = 1.732 cubic inch

Avoirdupois or Commercial Weight

1 gross or long ton = 2240 pounds 1 net or short ton = 2000 pounds

1 pound = 16 ounces = 7000 grains

1 ounce = 16 drachms = 437.5 grains

The following measures for weight are now seldom used in the United States:1 hundredweight = 4 quarters = 112 pounds (1 gross or long ton = 20 hundred-weights); 1 quarter = 28 pounds; 1 stone = 14 pounds; 1 quintal = 100 pounds

Troy Weight, used for Weighing Gold and Silver

1 pound = 12 ounces = 5760 grains

1 ounce = 20 pennyweights = 480 grains

1 pennyweight = 24 grains

1 carat =3.086 grains (used in weighing diamonds)

1 grain Troy = 1 grain avoirdupois = 1 grain apothecaries' weight

Apothecaries' Weight

1 pound = 12 ounces = 5760 grains

1 ounce = 8 drachms = 480 grains

1 drachm = 3 scruples = 60 grains

1 scruple =20 grains

Measures of Pressure

1 pound per square inch = 144 pounds per square foot = 0.068 atmosphere = 2.042 inches of mercury at 62° F. = 27.7 inches of water at 62°F = 2.31 feet of water at 62° F

1 atmosphere = 30 inches of mercury at 62° F. = 14.7 pounds per square inch = 2116.3 pounds per square foot = 33.95 feet of water at 62° F

1 foot of water at 62° F =62.355 pounds per square foot = 0.433 pound per square inch

1 inch of mercury at 62° F =1.132 foot of water = 13.58 inches of water = 0.491 pound per square inch

Miscellaneous

1 great gross = 12 gross = 144 dozen

1 quire=24 sheets

1 gross=12 dozen = 144 units

1 ream = 20 quires = 480 sheets

1 dozen=12 units

1 ream printing paper = 500 sheets

1 score=20 units

MABIS Tape Measure, Blue