How Many Milliliters in an Ounce?

Here is all you need to know to work out how many milliliters in an ounce. This information is helpful when trying to ensure you can measure ingredients precisely.

Understanding measurements is part of the 101 of cooking and baking. 

One common question many home cooks face is converting between milliliters (ml) and ounces (oz). 

How do you ensure you use the right amount of a liquid ingredient when a recipe mentions ounces, but your measuring cups are marked in milliliters? 

In this article, we break down the basics of milliliters and ounces, show you how to convert between them, and provide super helpful conversion tables for easy reference.

Check out How Many Milliliters in a Cup and How Many Milliliters in a Pint too!

How many milliliters in an ounce?

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What is a Milliliter?

A milliliter, abbreviated as “ml,” is a unit of volume in the metric system. It is a teeny tiny unit, equal to one-thousandth of a liter. 

Milliliters are typically used for measuring tiny amounts of liquid ingredients, such as lemon juice, milk, or vinegar, in recipes.

Learn about How Many Milliliters Are in a Gallon.

What is an Ounce?

An ounce, often written as “oz,” is a unit of weight and volume used mainly in the United States and a few other countries as part of the Imperial system of measurement. 

When dealing with liquids, an ounce is approximately equivalent to 29.5735 milliliters. 

Ounces are often used for measuring both liquid and dry ingredients in recipes.

Convert Ounces to Milliliters

Converting ounces to milliliters is super simple when you know how. You can use the following formula:

1 ounce (oz) ≈ 29.5735 milliliters (ml)

To convert a given amount of ounces to milliliters, all you need to do is multiply the number of ounces by 29.5735. Here is an example: if a recipe calls for 4 ounces of olive oil, you would calculate it like this:

4 oz × 29.5735 ml/oz = 118.294 ml

So, 4 ounces of olive oil are approximately equal to 118.294 milliliters.

Table with Conversions from Ounces to Milliliters

Here’s a nifty table with common conversions from ounces to milliliters:

Ounces (oz)Milliliters (ml)
1 oz29.5735 ml
2 oz59.147 ml
3 oz88.7205 ml
4 oz118.294 ml
5 oz147.8675 ml

Feel free to use this table as a quick reference when working with recipes that use ounces. Print it out and stick it on the fridge, or keep a copy of it in your phone to refer to. 

Table with Conversions from Milliliters to Ounces

If you need to convert milliliters to ounces, you can use this table for reference:

Milliliters (ml)Ounces (oz)
10 ml0.338 oz
25 ml0.845 oz
50 ml1.691 oz
100 ml3.381 oz
250 ml8.453 oz

Equipment for Measuring

You will need the right equipment to correctly measure both milliliters and ounces. 

Here are some commonly used tools:

  1. Liquid measuring cup. This type of cup usually has the measurements in milliliters and ounces printed on the side. This makes these cups a versatile tool for any recipe.
  2. Kitchen scale. For precise measurements of both dry and liquid ingredients, a digital kitchen scale can be your number one favorite piece of equipment in the kitchen! It can be set to display ounces or grams.
  3. Measuring spoons. These are handy for small quantities of liquids and dry ingredients. Many measuring spoon sets include milliliter and ounce measurements.
  4. Conversion charts. As seen above, conversion tables can be printed or kept handy in your kitchen for quick reference.

Imperial System Vs Metric System

The world is divided when it comes to measurement systems. The Imperial system, used in the United States and a few other countries, relies on units like ounces, pounds, and gallons. 

Meanwhile, the Metric system, embraced by most of the world, uses milliliters, grams, and liters for measurements. The Metric system is generally considered more straightforward and precise for scientific and culinary purposes, making it the method of choice in many professional kitchens.

Knowing how to convert between milliliters and ounces is a life skill for any home cook or baker. 

Whether you use the Imperial or Metric system, understanding both can make following recipes from around the world a breeze. 

With the help of conversion tables and the right measuring tools, you will be well-equipped to tackle any culinary challenge that comes your way. 

So, go ahead and explore new recipes with confidence, knowing you can easily convert those tricky measurements!

Frequently Asked Questions (FAQs)

How many milliliters in an ounce?

There are approximately 29.5735 milliliters in one ounce. This conversion is commonly used when working with liquid ingredients in recipes.

How many ounces in a milliliter?

To convert milliliters to ounces, you’ll find that 1 milliliter is roughly equivalent to 0.0338 ounces. This conversion is practical when switching from the metric to the Imperial system.

How many milliliters in an ounce of butter?

An ounce of butter is equivalent to approximately 29.5735 milliliters. This conversion applies to all forms of butter, whether it’s melted or in solid form.

How many milliliters in an ounce of water?

An ounce of water also contains approximately 29.5735 milliliters. Due to its consistent density, water is often used as a reference point for liquid measurements.

How many milliliters in an ounce of flour?

The conversion for flour or any dry ingredient can be a bit trickier, as the volume can vary depending on how it’s packed. On average, one ounce of flour roughly equals 29.5735 milliliters, but it’s best to measure dry ingredients by weight for precision.

What are the different ways to measure milliliters?

Milliliters can be measured using various tools, including:

  • Liquid measuring cup: Explicitly designed for liquids, it often features milliliter markings.
  • Graduated cylinder: Commonly used in scientific settings, it provides precise milliliter measurements.
  • Measuring spoons: Many sets include milliliter measurements for smaller quantities.

What are the different ways to measure ounces?

Ounces can be measured using the following methods:

  • Kitchen scale: A digital scale can measure liquid and dry ingredients in ounces or grams.
  • Liquid measuring cup: Typically features ounce markings for liquid ingredients.
  • Measuring cups: Dry ingredients can be measured in ounces using measuring cups designed for this purpose.
  • Measuring spoons: Small quantities of both liquids and dry ingredients can be measured in ounces with measuring spoons that include ounce markings.

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