WWWebster Source

WEIGHT AND MEASURES1
UNITABBREVIATION
OR SYMBOL
EQUIVALENTS IN OTHER
UNITS OF SAME SYSTEM
METRIC EQUIVALENT
WEIGHT
Avoirdupois2
ton
short ton
20 short hundredweight, 2000 pounds0.907 metric ton
long ton
20 long hundredweight, 2240 pounds1.016 metric ton
hundredweightcwt
short hundredweight100 pounds, 0.05 short tons45.359 kilograms
long hundredweight112 pounds, 0.05 long ton50.802 kilograms
poundlb or lb avdp
also #
16 ounces, 7000 grains0.454 kilogram
ounceoz or oz avdp16 drams, 437.5 grains, 0.0625 pound28.350 grams
dramdr or dr avdp27.344 grains, 0.0625 ounce1.772 grams
graingr0.037 dram, 0.002286 ounce0.0648 gram
Troy
poundlb t12 ounces, 240 pennyweight, 5760 grains0.373 kilogram
ounceoz t20 pennyweight, 480 grains, 0.083 pound31.103 grams
pennyweightdwt also pwt24 grains, 0.05 ounce1.555 grams
graingr0.042 pennyweight, 0.002083 ounce0.0648 gram
Apothecaries'
poundlb ap12 ounces, 5760 grains0.373 kilogram
ounceoz ap8 drams, 480 grains, 0.083 pound31.103 grams
dramdr ap3 scruples, 60 grains3.888 grams
scruples ap20 grains, 0.333 dram1.296 grams
graingr0.05 scruple, 0.002083 ounce, 0.0166 dram0.0648 gram
CAPACITY
U.S. liquid measure
gallongal4 quarts (231 cubic inches)3.785 liters
quartqt2 pints (57.75 cubic inches)0.946 liter
pintpt4 gills (28.875 cubic inches473.176 milliliters
gillgi4 fluid ounces (7.219 cubic inches)118.294 milliliters
fluid ouncefl oz8 fluid drams (1.805) cub inches)29.573 milliliters
fluid dramfl dr60 minims (0.226 cubic inch)3.697 milliliters
minimmin1/60 fluid dram (0.003760 cubic inch)0.061610 milliliter
U.S. dry measure
bushelbu4 pecks (2150.42 cubic inches)35.239 liters
peckpk8 quarts (537.605 cubic inches)8.810 liters
quartqt2 pints (67.201 cubic inches)1.101 liters
pintpt½ quart (33.600 cubic inches)0.551 liter
British imperial liquid and dry measure
bushelbu4 pecks (2219.36 cubic inches)36.369 liters
peckpk2 gallons (554.84 cubic inches)9.092 liters
gallongal4 quarts (277.420 cubic inches)4.546 liters
quartqt2 pints (69.355 cubic inches)1.136 liters
pintpt4 gills (34.678 cubic inches)568.26 milliliters
gillgi5 fluid ounces (8.669 cubic inches)142.066 milliliters
fluid ouncefl oz8 fluid drams (1.7339 cubic inches)28.412 milliliters
fluid dramfl dr60 minims (0.216734 cubic inch)3.5516 milliliters
minimmin1/60 fluid dram (0.003612 cubic inch)0.059194 milliliter
LENGTH
milemi5280 feet, 1760 yards, 320 rods1.609 kilometers
rodrd5.50 yards, 16.5 feet5.029 meters
yardyd3 feet, 36 inches0.9144 meter
footft or '12 inches, 0.333 yard30.48 centimeters
inchin or " 0.083 foot, 0.028 yard2.54 centimeters
AREA
square milesq mi or mi2640 acres, 102,400 square rods2.590 square kilometers
acre4840 square yards, 43,560 square feet0.405 hectare, 4047 square meters
square rodsq rd or rd230.35 square yards, 0.00625 acre25.293 square meters
square yardsq yd or yd21296 square inches, 9 square feet0.836 square meter
square footsq ft or ft2144 square inches, 0.111 square yard0.093 square meter
square inchsq in or in20.0069 square foot, 0.00077 square yard6.452 square centimeters
VOLUME
cubic yardcu yd or yd327 cubic feet, 46,656 cubic inches0.765 cubic meter
cubic footcu ft or ft31728 cubic inches, 0.0370 cubic yard0.028 cubic meter
cubic inchcu in or in30.00058 cubic foot, 0.000021 cubic yard16.387 cubic centimeters
1For U.S. equivalents of the metric unit see Metric System table.
2The U.S. uses the avoirdupois units as a common system of measuring weight.



METRIC SYSTEM1
LENGTH
UnitAbbreviation Number of
Meters
Approximate U.S. Equivalent
kilometerkm1,0000.62 mile
hectometerhm100328.08 feet
dekameterdam1032.81 feet
meterm139.37 inches
decimeterdm0.13.94 inches
centimetercm0.010.39 inch
millimetermm0.0010.039 inch
micrometerµm0.0000010.000039 inch
AREA
UnitAbbreviation Number of
Square Meters
Approximate U.S. Equivalent
square kilometersq km or km21,000,0000.3861 square miles
hectareha10,0002.47 acres
area100119.60 square yards
square centimetersq cm or cm20.00010.155 square inch
VOLUME
UnitAbbreviation Number of
Cubic Meters
Approximate U.S. Equivalent
cubic meterm311.307 cubic yards
cubic decimeterdm30.00161.023 cubic inches
cubic centimetercu cm or
cm3 also cc
0.0000010.061 cubic inch
CAPACITY
UnitAbbreviation Number of
Liters
Approximate U.S. Equivalent
cubic dryliquid
kiloliterkl1,0001.31 cubic yards

hectoliterhl1003.53 cubic feet2.84 bushels
dekaliterdal100.35 cubic foot1.14 pecks2.64 gallons
literl161.02 cubic inches0.908 quart1.057 quarts
cubic decimeterdm3161.02 cubic inches0.908 quart1.057 quarts
deciliterdl0.106.1 cubic inches0.18 pint0.21 pint
centilitercl0.010.61 cubic inch
0.338 fluid ounce
milliliterml0.0010.061 cubic inch
0.27 fluid dram
microliterµl0.0000010.000061 cubic inch
0.00027 fluid dram
MASS AND WEIGHT
UnitAbbreviation Number of
Grams
Approximate U.S. Equivalent
metric tont1,000,0001.102 short tons
kilogramkg1,0002.2046 pounds
hectogramhg1003.527 ounces
dekagramdag100.353 ounce
gramg10.035 ounce
decigramdg0.101.543 grains
centigramcg0.010.154 grain
milligrammg0.0010.015 grain
microgramµg0.0000010.000015 grain
1For metric equivalents of U.S. units, see Weights and Measures table