**Fluid Volume**

Liquid volume | ||
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Most common measures shown in italic fontExact conversions in |
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Unit | Divisions | SI Equivalent |

1 minim (min) | ~ 1 drop or 0.95 grain of water | 61.611519922 μL |

1 US fluid dram (fl dr) | 60 min |
3.696691195 mL |

1 teaspoon (tsp) |
80 min |
4.928921594 mL |

1 tablespoon (Tbsp) |
3 tsp or 4 fl dr |
14.786764781 mL |

1 US fluid ounce (fl oz) |
2 Tbsp or 1.0408 oz av of water |
29.573529563 mL |

1 jigger (jig) | 3 Tbsp |
44.360294344 mL |

1 US gill (gi) | 4 fl oz |
118.29411825 mL |

1 US cup (cp) |
2 gi or 8 fl oz |
236.5882365 mL |

1 (liquid) US pint (pt) |
2 cp or 16.65 oz av of water |
473.176473 mL |

1 (liquid) US quart (qt) |
2 pt |
0.946352946 L |

1 (liquid) US gallon (gal) |
4 qt or 231 cu in |
3.785411784 L |

1 (liquid) barrel (bbl) | 31.5 gal or 1⁄_{2} hogshead |
119.240471196 L |

1 oil barrel (bbl) | 42 gal or 2⁄_{3} hogshead |
158.987294928 L |

1 hogshead | 63 gal or 8.421875 cu ftor 524.7 lb of water |
238.480942392 L |

One fluid ounce is 1⁄_{16} of a U.S. pint, 1⁄_{32} of a U.S. quart, and 1⁄_{128} of a U.S. gallon. The fluid ounce derives its name originally from being the volume of one ounce avoirdupois of water, but in the U.S. it is defined as 1⁄_{128} of a U.S. gallon. Consequently, a fluid ounce of water weighs about 1.041 ounces avoirdupois.

The saying "a pint's a pound the world around" refers to 16 US fluid ounces of water weighing approximately (about 4% more than) one pound avoirdupois. An imperial pint of water weighs a pound and a quarter.

There are varying standards for barrel for some specific commodities, including 31 gal for beer, 40 gal for whiskey or kerosene, and 42 gal for petroleum. The general standard for liquids is 31.5 gal or half a hogshead. The common 55 gallon size of drum for storing and transporting various products and wastes is sometimes confused with a barrel, though it is not a standard measure.

In the United States, single servings of beverages are usually measured in fluid ounces. Milk is usually sold in half pints (8 fluid ounces), pints, quarts, half gallons, and gallons. Water volume for sinks, bathtubs, ponds, swimming pools, etc., is usually stated in gallons or cubic feet. Quantities of gases are usually given in cubic feet (at one atmosphere).

Minims, drams and gill are rarely used currently.

Read more about this topic: Customary Units In The United States, Units of Capacity and Volume

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### Famous quotes containing the words volume and/or fluid:

“Bishop Berkeley destroyed this world in one *volume* octavo; and nothing remained, after his time, but mind; which experienced a similar fate from the hand of Hume in 1737.”

—Sydney Smith (1771–1845)

“On and on eternally

Shall your altered *fluid* run,

Bud and bloom and go to seed;

But your singing days are done;”

—Edna St. Vincent Millay (1892–1950)