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Reference Tables -- U.S. Weights & Measures Table

 

U.S. Weights & Measures Tables


 

Linear Measure
12 inches (in.)
= 1 foot (ft.)
1 mil = 0 .001 in.
3 feet
= 1 yard (yd)
= 36"
Surveyors' Measurements
1 link = 7.92 in
1 rod (rd)
= 5 1/2 yards
= 16.5 ft.
1 chain = 4 rods
= 22 yds.
= 66 ft
= 100 links
40 rods
= 1 furlong (fur)
= 220 yds
= 660 ft.
8 furlongs
= 1 statute mile (mi.)
= 80 chains
= 1,760 yds
= 5,280 ft.
5,280 feet
= 1 statute or land mile
Nautical Measurements
1 fathom = 2 yds
= 6 ft.
100 fathoms
= 1 cable length
10 cables length
= 1 international nautical mile
6,076.11549 feet
= 1 international nautical mile
= length of a minute of longitude at equator
= 1.1508 statute miles
3 nautical miles
= 1 league
1 knot = 1 nautical mile per hour
= 1.1508 statute miles per hour
60 nautical miles = 1 degree of a great circle of earth (latitude)
360 degrees

= circumference of earth at equator
= 21,600 nautical miles
= 24,856.8 statute miles

 

Area Measure
1 sq ft. = 144 square inches
1 sq yd = 9 sq. ft
= 1,296 sq in.
1 sq rod = 30.25 square yards
= 272.25 sq ft.
= 625 sq. links
1 acre = 160 square rods
= 4,840 sq yds
= 43,560 sq ft.
1 sq mi. = 640 acres
= 1 section (of land)
1 township = 6 miles square
= 36 sections
= 36 sq mi.

 

Volumes - Cubic
1,728 cubic inches = 1 cu ft.
27 cubic feet = 1 cu yd

 

Volumes - Liquid Measure
1 pint (pt)

= 4 gills (gi)
= 16 fluid ounces (oz)
= 28.875 cu in.

1 quart (qt)

= 2 pints
= 57.75 cu in.

1 gallon (gal) = 4 quarts
= 231 cu in.
= 8 pts
= 32 gills
1 cubic foot = 7.48 gallons
1 barrel

= 31.5 gallons

1 hogshead = 2 barrels

 

Apothecaries' Fluid Measure
60 minims (min.) = 1 fluid dram (fl dr)
= 0.2256 cu in.
8 fluid drams = 1 fluid ounce (fl oz)
= 1.8047 cu in.
16 fluid ounces = 1 pt = 28.875 cu in.
= 128 fl drs
2 pints = 1 qt
= 57.75 cu in.
= 32 fl oz
= 256 fl drs
4 quarts = 1 gal
= 231 cu in.
= 128 fl oz
= 1,024 fl drs

 

When necessary to distinguish the avoirdupois dram from the apothecaries' dram, or to distinguish the avoirdupois dram or ounce from the fluid dram or ounce, or to distinguish the avoirdupois ounce or pound from the troy or apothecaries' ounce or pound, the word “avoirdupois” or the abbreviation “avdp” should be used in combination with the name or abbreviation of the avoirdupois unit. (The “grain” is the same in avoirdupois, troy, and apothecaries' weights.)

Avoirdupois Weight
2711/32 grains = 1 dram (dr)
16 drams = 1 oz
= 437 1/2 grains
16 ounces = 1 lb
= 256 drams
= 7,000 grains
100 pounds = 1 hundredweight (cwt)1
20 hundredweights = 1 ton (tn)
= 2,000 lbs1
In “gross” or “long” measure, the following values are recognized:
112 pounds = 1 gross or long cwt1
20 gross or long hundredweights
= 1 gross or long ton
= 2,240 lbs1


1. When the terms “hundredweight” and “ton” are used unmodified, they are commonly understood to mean the 100-pound hundredweight and the 2,000-pound ton, respectively; these units may be designated “net” or “short” when necessary to distinguish them from the corresponding units in gross or long measure.


When necessary to distinguish the dry pint or quart from the liquid pint or quart, the word “dry” should be used in combination with the name or abbreviation of the dry unit.

Volume - Dry Measure
1 quart

= 2 pints
= 67.2006 cu in.

1 peck (pk) = 8 quarts
= 537.605 cu in.
= 16 pts
1 bushel (bu) = 4 pecks
= 2,150.42 cu in.
= 32 qts

 

Apothecaries' Weight
20 grains =1 scruple (s ap)
3 scruples = 1 dram apothecaries' (dr ap)
= 60 grains
8 drams apothecaries' = 1 ounce apothecaries' (oz ap)
= 24 scruples = 480 grains
12 ounces apothecaries' = 1 pound apothecaries' (lb ap)
= 96 drams apothecaries'
= 288 scruples
= 5,760 grains

 

Units of Circular Measure
Second ('') =
Minute (') = 60 seconds
Degree (°) = 60 minutes
Right angle = 90 degrees
Straight angle = 180 degrees
Circle = 360 degrees

 

Troy Weight
24 grains = 1 pennyweight (dwt)
20 pennyweights = 1 ounce troy (oz t)
= 480 grains
12 ounces troy = 1 pound troy (lb t)
= 240 pennyweights
= 5,760 grains

 

Gunter's or Surveyor's Chain Measure
7.92 inches =1 link (li)
100 links = 1 chain (ch)
= 4 rods
= 66 ft.
80 chains =1 statute mile
= 320 rods
= 5,280 ft.

 



 


 

 

 

 

 


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