In these tables it is necessary to differentiate between the "international foot" and the "survey foot;" the survey foot is underlined. When the name of a unit is enclosed in brackets (thus, [1 hand] . . . ), this indicates (1) that the unit is not in general current use in the United States, or (2) that the unit is believed to be based on "custom and usage" rather than on formal authoritative definition. Equivalents involving decimals are, in most instances, rounded off to the third decimal place except where they are exact, in which cases these exact equivalents are so designated. The equivalents of the imprecise units "tablespoon" and "teaspoon" are rounded to the nearest milliliter.

UNITS OF CAPACITY OR VOLUME

1 barrel (bbl), liquid	31 to 42 gallons.
1 barrel (bbl), standard for fruits,	7056 cubic inches.
vegetables, and other dry	105 dry quarts.
commodities, except cranberries	3.281 bushels, struck measure.
	5 826 cubic inches.
1 barrel (bbl), standard, cranberry	86 45/64 dry quarts.
	2.709 bushels, struck measure.
1 bushel (bu) (U.S.) struck measure	2150.42 cubic inches (exactly).
	35.239 liters.
[1 bushel, heaped (U.S.)]	2 747.715 cubic inches.
	1.278 bushels, struck measure.
[1 bushel (bu) (British Imperial)	1.032 U.S. bushels, struck measure
(struck measure	2219.36 cubic inches.
1 cord (cd) (firewood	128 cubic feet (exactly).
1 cubic centimeter (cm3)	0.061 cubic inch.
1 cubic decimeter (dm3)	61.024 cubic inches.
1 cubic foot (ft3)	7.481 gallons.
	28.316 cubic decimeters.
	0.554 fluid ounce.
1 cubic inch (in3)	4.433 fluid drams.
	16.387 cubic centimeters.
1 cubic meter (m3)	1.308 cubic yards.
1 cubic yard (yd3)	0.765 cubic meter.
	8 fluid ounces (exactly).
1 cup, measuring	237 milliliters.
	1/2 liquid pint (exactly).
1 dekaliter (daL)	2.642 gallons.
	1.135 pecks.
	1/8 fluid ounce (exactly).
1 dram, fluid (or liquid) (fl dr	0.226 cubic inch.
or f) (U.S.)	3.697 milliliters.
	1.041 British fluid drachms.
	0.961 U.S. fluid dram.
[1 drachm, fluid (fl dr) (British)]	0.217 cubic inch.
	3.552 milliliters.
	231 cubic inches (exactly).
1 gallon (gal) (U.S.)	3.785 liters.
	0.833 British gallon.
	128 U.S. fluid ounces (exact-ly).
	277.42 cubic inches.
[1 gallon (gal) (British Imperial)]	1.201 U.S. gallons.
	4.546 liters.
	160 British fluid ounces (exactly).
	7.219 cubic inches.
1 gill (gi)	4 fluid ounces (exactly).
	0.118 liter.
1 hectoliter (hL)	26.418 gallons.
	2.838 bushels.
	1.057 liquid quarts.
1 liter (1 cubic decimeter exactly)	0.908 dry quart.
	61.025 cubic inches
	0.271 fluid dram.
1 milliliter (mL)	16.231 minims.
	0.061 cubic inch.
1 ounce, fluid (or liquid) (fl oz	1.805 cubic inches.
or f)(U.S.)	29.573 milliliters.
	1.041 British fluid ounces.-
	0.961 U.S. fluid ounce.
[1 ounce, fluid (fl oz) (British)]	1.734 cubic inches.
	28.412 milliliters.
1 peck (pk)	8.810 liters.
1 pint (pt), dry	33.600 cubic inches.
-	0.551 liter.
1 pint (pt), liquid	28.875 cubic inches exactly.
	0.473 liter.
	67.201 cubic inches.
1 quart (qt), dry (U.S.)	1.101 liters.
	0.969 British quart.
	57.75 cubic inches (exactly).
1 quart (qt), liquid (U.S.)	0.946 liter.
	0.833 British quart.
	69.354 cubic inches.
[1 quart (qt) (British)]	1.032 U.S. dry quarts.
	1.201 U.S. liquid quarts.
	3 teaspoons (exactly).
1 tablespoon, measuring	15 milliliters.
	4 fluid drams.
	1/2 fluid ounce (exactly).
	1/3 tablespoon (exactly).
1 teaspoon, measuring	5 milliliters.
	1-1/3 fluid drams.
	270.91 U.S. gallons.
1 water ton (English)	224 British Imperial gallons.
	(exactly).

NIST Handbook 44, Tables of Units of Measurement