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Common Weights and Measures

Common Weights and Measures

Length

Metric System

1 millimeter  =  1/1,000 meter
1 centimeter  =  1/100 meter
1 decimeter  =  1/10 meter
1 meter (basic unit of length)
1 dekameter  =  10 meters
1 kilometer  =  1,000 meters

American and British Units

1 inch  =  1/36 yard  =  1/12 foot
1 foot  =  1/3 yard
1 yard (basic unit of length)
1 rod  =  5 1/2 yards
1 furlong  =  220 yards  =  40 rods
1 mile  =  1,760 yards  =  5,280 feet
1 fathom  =  6 feet
1 nautical mile  =  6,076.1 feet

Conversion Factors

1 centimeter  =  0.39 inch
1 inch  =  2.54 centimeters
1 meter  =  39.37 inches
1 foot  =  0.305 meter
1 meter  =  3.28 feet
1 yard  =  0.914 meter
1 meter  =  1.094 yards
1 kilometer  =  0.62 mile
1 mile  =  1.609 kilometers

Area

Metric System

1 square centimeter  =  1/10,000 square meter
1 square decimeter  =  1/100 square meter
1 square meter (basic unit of area)
1 are  =  100 square meters
1 hectare  =  10,000 square meters  =  100 ares
1 square kilometer  =  1,000,000 square meters

American and British Units

1 square inch  =  1/1,296 square yard  =  1/144 square foot
1 square foot  =  1/9 square yard
1 square yard (basic unit of area)
1 square rod  =  30 1/4 square yards
1 acre  =  4,840 square yards  =  160 square rods
1 square mile  =  3,097,600 square yards  =  640 acres

Conversion Factors

1 square centimeter  =  0.155 square inch
1 square inch  =  6.45 square centimeters
1 acre  =  0.405 hectare
1 hectare  =  2.47 acres
1 square kilometer  =  0.386 square mile
1 square mile  =  2.59 square kilometers

Volume and Capacity (Liquid and Dry)

Metric System

1 cubic centimeter  =  1/1,000,000 cubic meter
1 cubic decimeter  =  1/1,000 cubic meter
1 cubic meter  =  1 stere (basic unit of volume)
1 milliliter  =  1/1,000 liter  =  1 cubic centimeter
1 centiliter  =  1/100 liter
1 deciliter  =  1/10 liter
1 liter  =  1 cubic decimeter (basic unit of capacity)
1 dekaliter  =  10 liters
1 hectoliter  =  100 liters  =  1/10 cubic meter

American and British Units

1 cubic inch  =  1/46,656 cubic yard  =  1/1,728 cubic foot
1 cubic foot  =  1/27 cubic yard
1 cubic yard (basic unit of volume)
1 U.S. fluid ounce  =  1/128 U.S. gallon  =  1/16 U.S. pint
1 British imperial fluid ounce  =  1/160 imperial gallon  =  1/20 imperial pint
1 pint  =  1/8 gallon  =  1/2 quart
1 quart  =  1/4 gallon
1 U.S. gallon (basic unit of liquid capacity in the United States)  =  231 cubic inches
1 imperial gallon (basic unit of liquid capacity in some Commonwealth nations)  =  277.4 cubic inches
1 dry pint  =  1/64 bushel  =  1/2 dry quart
1 dry quart  =  1/32 bushel  =  1/8 peck
1 peck  =  1/4 bushel
1 U.S. bushel (basic unit of dry capacity in the United States)  =  2,150.4 cubic inches
1 imperial bushel (basic unit of dry capacity in some Commonwealth nations)  =  2,219.4 cubic inches

Conversion Factors

1 cubic centimeter  =  0.06 cubic inch
1 cubic inch  =  16.4 cubic centimeters
1 cubic yard  =  0.765 cubic meter
1 cubic meter  =  1.3 cubic yards
1 milliliter  =  0.034 fluid ounce
1 fluid ounce  =  29.6 milliliters
1 U.S. quart  =  0.946 liter
1 liter  =  1.06 U.S. quarts
1 U.S. gallon  =  3.8 liters
1 imperial gallon  =  1.2 U.S. gallons  =  4.5 liters
1 liter  =  0.9 dry quart
1 dry quart  =  1.1 liters
1 dekaliter  =  0.28 U.S. bushel
1 U.S. bushel  =  0.97 imperial bushel  =  3.5 dekaliters

Weight (Mass)

Metric System

1 milligram  =  1/1,000,000 kilogram  =  1/1,000 gram
1 centigram  =  1/100,000 kilogram  =  1/100 gram
1 decigram  =  1/10,000 kilogram  =  1/10 gram
1 gram  =  1/1,000 kilogram
1 dekagram  =  1/100 kilogram  =  10 grams
1 hectogram  =  1/10 kilogram  =  100 grams
1 kilogram (basic unit of weight or mass)
1 metric ton  =  1,000 kilograms

American and British Units: Avoirdupois

1 grain  =  1/7,000 pound  =  1/437.5 ounce
1 dram  =  1/256 pound  =  1/16 ounce
1 ounce  =  1/16 pound
1 pound (basic unit of weight or mass)
1 short hundredweight  =  100 pounds
1 long hundredweight  =  112 pounds
1 short ton  =  2,000 pounds
1 long ton  =  2,240 pounds

American and British Units: Troy and Apothecaries'

1 grain  =  1/7,000 avoirdupois pound  =  1/5,760 troy or apothecaries' pound
1 apothecaries' scruple  =  20 grains  =  1/3 dram
1 pennyweight  =  24 grains  =  1/20 troy ounce
1 apothecaries' dram  =  60 grains  =  1/8 apothecaries' ounce
1 troy or apothecaries' ounce  =  480 grains  =  1/12 troy or apothecaries' pound
1 troy or apothecaries' pound  =  5,760 grains  =  5,760/7,000 avoirdupois pound

Conversion Factors

1 milligram  =  0.015 grain
1 grain  =  64.8 milligrams
1 gram  =  0.035 avoirdupois ounce
1 avoirdupois ounce  =  28.35 grams
1 troy or apothecaries' pound  =  0.82 avoirdupois pound  =  0.37 kilogram
1 avoirdupois pound  =  1.2 troy or apothecaries' pounds  =  0.45 kilogram
1 kilogram  =  2.205 avoirdupois pounds
1 short ton  =  0.9 metric ton
1 metric ton  =  1.1 short tons

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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