Convert Volume from Fluid Ounces to Milliliters (fl-oz to ml)

Fluid Ounce to Milliliter Conversion Formula

Example

Let's convert 5 Fluid Ounce (fl-oz) to Milliliter (ml).

Using the formula:

Therefore, 5 Fluid Ounce (fl-oz) is equal to 147.86764825785619485 Milliliter (ml).

How many fluid ounces are in one milliliter? One Milliliter (ml) contains 0.0338140226 Fluid Ounces (fl-oz) — the inverse of the factor above. Multiplying by 29.573529651571238969 takes you from fluid ounces to milliliters; multiplying by 0.0338140226 brings you back.

Put in words: one fluid ounce equals 29.573529651571238969 milliliters, so the fluid ounce is the larger 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 Milliliter (mL)? A Simple Definition

A milliliter (mL) is a unit of volume in the metric system.

It's equal to one-thousandth of a liter (0.001 L). The plural form is milliliters.

How Many Cubic Centimeters (cm³) Are in a Milliliter?

A milliliter is the same as one cubic centimeter (1 mL = 1 cm³).

This direct relationship makes converting between liquid volume and cubic measurements incredibly simple.

This is why vehicle engine sizes are often listed in both cubic centimeters (cc) and liters.

For example, a 1500 cc engine is the same as a 1.5-liter engine.

How Do You Convert Milliliters of Water to Grams?

For most practical purposes, one milliliter of water at its densest has a mass of about one gram.

This simple one-to-one relationship makes the metric system very logical for science and cooking, where water is a common ingredient.

Although the official definition of the gram has been updated, this easy approximation remains widely used in many fields.

Where Are Milliliters Used Every Day?

The milliliter (mL) is a key unit for measuring small amounts of liquid in many different fields.

You can find it everywhere, from kitchens to laboratories.

• In Medicine: Dosages for liquid medications are almost always prescribed in milliliters (mL).
• In Cooking & Baking: Recipes often call for precise amounts of liquids, such as vanilla extract or oil, measured in milliliters (mL).
• In Science: In fields such as chemistry and biology, the milliliter is a standard unit for measuring and handling liquids in experiments.

Fluid Ounce to Milliliter Conversion Table

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