How many Ounces in a Quart?

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Grace
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I often need to look up conversion rates for fluid ounces (oz) to quarts (qt) and back, so I made a small calculator and a cheat sheet.

Oz to Qt Calculator

OZ
QRT

Or here’s a cheat sheet you can print out:

Fluid ounces (oz)Quarts (qt)
10.03125
40.125
80.25
160.5
240.75
321
401.25
481.5
561.75
642
A measuring cup with ounces to quarts conversion

Background

The ounce (abbreviated oz.) is a unit of volume, mass, or weight. (The name “ounce” came to use from the Latin word “uncia”, also a measure of volume.)

Ounces are used in the majority of British-derived systems of measurements, including the US and the UK Imperial system.

In the US measurement system, ounces in a quart can be calculated in two units:

  1. U.S quart (liquid)
  2. U.S quart (dry)

How many fluid ounces in a U.S Quart (Liquid)?

A fluid ounce (fl. oz. or oz. fl.) is a unit of volume. In the Imperial system, one fluid ounce equals approximately 28.4 milliliters, while in the U.S system, the fluid ounce stands for about 29.6 milliliters of liquid.

  • Imperial system: 1 fl. oz. = 28.4 ml
  • U.S system: 1 fl. oz. = 29.6 ml

One quart (liquid) has approximately 32 U.S fluid ounces, while in the imperial system, one quart equals 33.306969 (33.31) fluid ounces.

  • 1 U.S fluid ounce = 1/32 U.S quart liquid.
  • 1 U.S quart liquid = 33.31 Imperial fluid ounces.

You can put it the other way around too:

  • 1 Quart (qt) = 32 fl. oz. U.S
  • 1 Quart (qt) = 33.31 fl. oz. Imp.
A measuring cup with ounces to quarts conversion and cookies

How many fluid ounces in a U.S Quart (Dry)?

A U.S quart (dry) contains 37.236711 U.S fluid ounces or 38.757564 Imperial fluid ounces. You can thus approximately set the value of the U.S quart (Dry) as follows:

  • 1 Quart Dry = 37.24 U.S. fluid ounces.
  • 1 Quart Dry = 38.76 Imperial fluid ounces.

What about pints, cups, and gallons?

One quart equals two pints, while one pint equals two cups.

  • 1 Quart= 2 Pints = 4 Cups = 32 fl. oz.
  • 1 Pint = 2 Cups = 16 fl. oz.
  • 1 Cup = 8 fl. oz.

What is a gallon?

A gallon is a unit of measurement that is equal to four quarts. It is better to say, though, that a quart is one-fourth of a gallon, as that is how it got the name in the first place (“quart” is an abbreviation of the word “quarter”).

  • 1 gallon = 32 fl. oz. multiplied by 4 = 128 fl. Oz.

You can also calculate how many pints or cups there are in one gallon of liquid:

  • 1 gallon = 2 pints multiplied by 4 = 8 pints
  • 1 gallon = 4 cups multiplied by 4 = 16 cups
A french press with ounces to quarts conversion

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