Convert Volume from Fluid Ounces to Quarts (fl-oz to qt)

Fluid Ounce to Quart Conversion Formula

Example

Let's convert 5 Fluid Ounce (fl-oz) to Quart (qt).

Using the formula:

Therefore, 5 Fluid Ounce (fl-oz) is equal to 0.15625 Quart (qt).

How many fluid ounces are in one quart? One Quart (qt) contains 32 Fluid Ounces (fl-oz) — the inverse of the factor above. Multiplying by 0.03125 takes you from fluid ounces to quarts; multiplying by 32 brings you back.

Put in words: one fluid ounce equals 0.03125 quarts, so the fluid ounce is the smaller unit of this pair. Converting between them never changes the amount of volume being measured — only the size of the unit you count it in.

What Is a Fluid Ounce (fl oz)?

A fluid ounce (fl oz) is a common unit used to measure volume in the imperial and US customary systems.

It tells you how much space a liquid takes up.

Is a US Fluid Ounce the Same as a UK Fluid Ounce?

This is a common point of confusion: no, they are not the same!

The US fluid ounce is slightly larger than the UK (Imperial) fluid ounce. This slight difference is crucial to remember for recipes and measurements, especially when converting between systems.

• 1 US fluid ounce (fl oz) is approximately 29.57 milliliters (ml).
• 1 UK (Imperial) fluid ounce (fl oz) is approximately 28.41 milliliters (ml).

Fluid Ounce (Volume) vs. Ounce (Weight): What's the Difference?

The word "ounce" can be tricky because it measures two different things:

A fluid ounce (fl oz) measures volume (how much space something occupies).

An ounce (oz) measures weight (how heavy something is).

Think of it like this: a fluid ounce tells you the size of a container, while a regular ounce tells you how heavy its contents are.

For example, one fluid ounce of honey is much heavier than one fluid ounce of cooking oil because honey has a higher density.

Where Did the Fluid Ounce Come From?

The idea of the fluid ounce has a practical history.

In the British Imperial system, it was initially defined as the volume taken up by one ounce of water at a specific temperature.

This simple link between weight and volume made it a convenient and intuitive unit for measuring everyday liquids like water, wine, and ale for centuries.

What is a Quart (qt)?

A quart (qt) is a unit of volume measurement.

A single quart is equal to 32 fluid ounces (fl oz), 2 pints, or 4 cups.

It is a key measurement in both the imperial and United States customary systems. The plural form is quarts.

Where Does the Name "Quart" Come From?

The word "quart" comes from the Latin word quartus, meaning "a fourth part."

This name is a direct clue to its size: a quart is exactly one-quarter of a gallon. This simple relationship makes it an easy-to-remember unit.

US vs. Imperial (UK) Quarts: A Key Difference

It's crucial to know that the US and Imperial (UK) quarts are not the same size. While both systems are related, their definitions for a quart differ significantly.

• A US liquid quart is equal to approximately 946.35 milliliters.
• An Imperial quart (UK) is about 20% larger, equal to approximately 1,136.52 milliliters.

This difference is critical to remember when converting recipes or measurements between countries.

What's the Difference Between a Liquid and a Dry Quart?

The United States customary system also distinguishes between a liquid quart and a dry quart.

A liquid quart is used for liquids like milk or oil, while a dry quart measures the volume of dry goods like berries or flour.

They are not the same volume.

• A US liquid quart is about 0.946 liters.
• A US dry quart is slightly larger, equaling approximately 1.101 liters.

Fluid Ounce to Quart Conversion Table

Here are some quick reference conversions from Fluid Ounce (fl-oz) to Quart (qt):