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Weights & Measures

Many old books on blacksmithing and metal working often use old units of measure. These tables should make converting them easier.

Volume Conversion Chart
1 barrel, liquid 31 to 42 gallons2
1 barrel, standard for fruits, vegetables, and other dry commodities except cranberries 7,056 cubic inches
105 dry quarts
3.281 bushels, struck measure
1 barrel, standard, cranberry 5,286 cubic inches
8645/64 dry quarts
2.709 bushels, struck measure
1 bushel (U.S.) struck measure3 2,150.42 cubic inches
35.238 liters
1 bushel, heaped (U.S.) 2,747.715 cubic inches
1.278 bushels, struck measure4
1 cord (firewood) 128 cubic feet
1 cubic centimeter 0.061 cubic inch
1 cubic decimeter 61.024 cubic inches
1 cubic foot 7.481 gallons
28.316 cubic decimeters
1 cubic inch 0.554 fluid ounce
4.433 fluid drams
16.387 cubic centimeters
1 cubic meter 1.308 cubic yards
1 cubic yard 0.765 cubic meter
1 cup, measuring 8 fluid ounces
1/2 liquid pint
1 dram, fluid or liquid (U.S.) 1/8 fluid ounces
0.226 cubic inch
3.697 milliliters
1.041 British fluid drachms
1 dekaliter 2.642 gallons
1.135 pecks
1 gallon (U.S.) 231 cubic inches
3.785 liters
0.833 British gallon
128 U.S. fluid ounces
1 gallon (British
Imperial)
277.42 cubic inches
1.201 U.S. gallons
4.546 liters
160 British fluid ounces
1 gill 7.219 cubic inches
4 fluid ounces
0.118 liter
1 hectoliter 26.418 gallons
2.838 bushels
1 liter 1.057 liquid quarts
0.908 dry quart
61.024 cubic inches
1 milliliter 0.271 fluid dram
16.231 minims
0.061 cubic inch
1 ounce, fluid or liquid (U.S.) 1.805 cubic inch
29.574 milliliters
1.041 British fluid ounces
1 peck 8.810 liters
1 pint, dry 33.600 cubic inches
0.551 liter
1 pint, liquid 28.875 cubic inches
0.473 liter
1 quart, dry (U.S.) 67.201 cubic inches
1.101 liters
0.969 British quart
1 quart, liquid (U.S.) 57.75 cubic inches
0.946 liter
0.833 British quart
1 quart (British) 69.354 cubic inches
1.032 U.S. dry quarts
1.201 U.S. liquid quarts
1 tablespoon,
measuring
3 teaspoons
4 fluid drams
1/2 fluid ounce
1 teaspoon,
measuring
1/3 tablespoon
11/3 fluid drams
1 assay ton5 29.167 grams
1 carat 200 milligrams
3.086 grains
1 dram, apothecaries' 60 grains
3.888 grams
1 dram, avoirdupois 27 11/32 (=27.344) grains
1.772 grams
1 gram 64.798 91 milligrams
1 grain 15.432 grains
0.035 avoirdupois ounce
1 hundredweight, gross or long6 112 pounds
50.802 kilograms
1 hundredweight, net or short 100 pounds
45.359 kilograms
1 kilogram 2.205 pounds
1 microgram (µg— the Greek letter mu in combination with the letter g) 0.000 001 gram
1 milligram 0.015 grain
1 ounce, avoirdupois 437.5 grains
0.911 troy or apothecaries' ounce
28.350 grams
1 ounce, troy or apothecaries' 480 grains
1.097 avoirdupois ounces
31.103 grams
1 pennyweight 1.555 grams
1 point 0.01 carat
2 milligrams
1 pound, avoirdupois 7,000 grains
1.215 troy or apothecaries' pounds
453.592 37 grams
1 pound, troy or apothecaries' 5,760 grains
0.823 avoirdupois pound
373.242 grams
1 ton, gross or long6 2,240 pounds
1.12 net tons
1.016 metric tons
1 ton, metric 2,204.623 pounds
0.984 gross ton
1.102 net tons
1 ton, net or short 2,000 pounds
0.893 gross ton
0.907 metric ton
Areas or Surfaces
1 acre 43,560 square feet
4,840 square yards
0.405 hectare
1 are 119.599 square yards
0.025 acre
1 hectare 2.471 acres
1 square centimeter 0.155 square inch
1 square decimeter 15.5 square inches
1 square foot 929.030 square centimeters
1 square inch 6.4516 square centimeters
1 square kilometer 0.386 square mile
247.105 acres
1 square meter 1.196 square yards
10.764 square feet
1 square mile 258.999 hectares
1 square millimeter 0.002 square inch
1 square rod, square pole,
or square perch
25.293 square meters
1 square yard 0.836 square meters
Metric and U.S. Equivalents
1 cable's length 120 fathoms
720 feet
219.456 meters
1 centimeter 0.3937 inch
1 chain (Gunter's or
 surveyor's)
66 feet
20.1168 meters
1 decimeter 3.937 inches
1 dekameter 32.808 feet
1 fathom 6 feet
1.8288 meters
1 foot 0.3048 meter
1 furlong 10 chains (surveyor's)
660 feet
220 yards
1/8 statute mile
201.168 meters
1 inch 2.54 centimeters
1 kilometer 0.621 mile
1 league (land) 3 statute miles
4.828 kilometers
1 link (Gunter's or
 surveyor's)
7.92 inches
0.201 168 meter
1 meter 39.37 inches
1.094 yards
1 micrometer 0.001 millimeter
0.000 039 37 inch
1 mil 0.001 inch
0.025 4 millimeter
1 mile (statute or
 land)
5,280 feet
1.609 kilometers
1 mile (nautical
 international)
1.852 kilometers
1.151 statute miles
0.999 U.S. nautical miles
1 millimeter 0.03937 inch
1 nanometer 0.001 micrometer or
0.000 000 039 37 inch
1 point (desktop
publishing)
0.013 889 inch
1/72 inch
0.352 778 millimeter
1/12 pica
1 rod, pole, or perch 161/2 feet
5.0292 meters
1 yard 0.9144 meter
Data Loom Design, Inc. Copyright© 2010 Updated: 4/10/2016