oz to ml

Understanding Ounces to Milliliters Conversion

Why Converting Ounces to Milliliters is Important

Converting ounces (oz) to milliliters (ml) is essential for various applications, including cooking, medicine, cosmetics, and scientific measurements. While ounces are commonly used in the United States, milliliters are the standard metric measurement for liquids globally. Knowing how to convert between these units ensures accurate measurements, preventing errors in recipes, dosages, and formulations.

How to Convert Ounces to Milliliters?

The conversion from ounces to milliliters depends on whether you are dealing with fluid ounces (fl oz) or weight ounces (oz). The standard conversion for fluid ounces is:

1 US fluid ounce = 29.5735 milliliters

To convert, multiply the number of ounces by 29.5735 to get the equivalent in milliliters.

For example:

  • 8 oz x 29.5735 = 236.59 ml
  • 16 oz x 29.5735 = 473.18 ml

For imperial fluid ounces, commonly used in the UK:

1 UK fluid ounce = 28.4131 milliliters

How Many Milliliters Are in One Ounce?

A single US fluid ounce contains approximately 29.57 ml, whereas a UK fluid ounce holds 28.41 ml. It’s important to check which system you are using, as the difference can affect the accuracy of measurements, particularly in scientific or medical applications.

Ounces to Milliliters Converter

For quick calculations, an ounces to milliliters converter can be incredibly useful. These converters allow users to input a value in ounces and instantly see the milliliter equivalent. Many digital tools and online calculators are available to simplify the conversion process.

Ounces to Milliliters Conversion Table

Below is a simple conversion chart for common ounce measurements:

Ounces (oz)Milliliters (ml)
1 oz29.57 ml
2 oz59.15 ml
4 oz118.29 ml
8 oz236.59 ml
12 oz354.88 ml
16 oz473.18 ml
20 oz591.47 ml

Formula for Converting Ounces to Milliliters

To manually convert ounces to milliliters, use this formula:

Milliliters (ml) = Ounces (oz) x 29.5735

This formula applies to US fluid ounces. If converting from UK fluid ounces, use:

Milliliters (ml) = Ounces (oz) x 28.4131

How Many Milliliters in 8 Ounces?

8 ounces (oz) = 236.59 ml in US measurement and 227.30 ml in UK measurement.

Fluid Ounces to Milliliters Conversion

For liquid measurements, fluid ounces are commonly used. The conversion remains:

  • 1 US fluid ounce = 29.5735 ml
  • 1 UK fluid ounce = 28.4131 ml

How Many Milliliters in 16 Ounces?

16 ounces = 473.18 ml in the US system and 454.60 ml in the UK system.

Ounces to Milliliters Conversion for Cooking

Many recipes use ounces for liquid ingredients. Here are some common conversions:

  • 1/4 cup (2 oz) = 59.15 ml
  • 1/2 cup (4 oz) = 118.29 ml
  • 1 cup (8 oz) = 236.59 ml

How Many Milliliters in 4 Ounces?

4 ounces = 118.29 ml in US measurement and 113.65 ml in UK measurement.

Ounces to Milliliters for Liquid Measurements

Different liquids have different densities, but their volume in fluid ounces to milliliters remains the same. For example, water, juice, or milk all use the standard conversion formula.

How Many Milliliters in 2 Ounces?

2 ounces = 59.15 ml in US measurement and 56.83 ml in UK measurement.

Ounces to Milliliters for Beverages

Soft drinks, coffee, and alcohol are often measured in ounces. Common conversions include:

  • 12 oz soda can = 354.88 ml
  • 16 oz coffee cup = 473.18 ml

How Many Milliliters in 1 Ounce?

1 ounce = 29.57 ml in US measurement and 28.41 ml in UK measurement.

Ounces to Milliliters for Recipes

When following international recipes, converting ounces to milliliters ensures accurate ingredient measurements, especially in baking.

How Many Milliliters in 12 Ounces?

12 ounces = 354.88 ml in US measurement and 340.96 ml in UK measurement.

Ounces to Milliliters for Cosmetics

Many beauty products are labeled in ounces. To convert:

  • 4 oz bottle = 118.29 ml
  • 8 oz lotion = 236.59 ml

How Many Milliliters in 6 Ounces?

6 ounces = 177.44 ml in US measurement and 170.47 ml in UK measurement.

Ounces to Milliliters for Perfumes

Perfume bottles often list sizes in ounces, making conversions necessary for international purchases.

How Many Milliliters in 10 Ounces?

10 ounces = 295.74 ml in US measurement and 284.13 ml in UK measurement.

Ounces to Milliliters for Medicine

Pharmaceutical dosages are typically given in milliliters. Knowing the conversion helps with medication administration.

How Many Milliliters in 20 Ounces?

20 ounces = 591.47 ml in US measurement and 568.26 ml in UK measurement.

Ounces to Milliliters for Paints

Paint volumes are sometimes labeled in ounces, requiring conversion for larger projects.

How Many Milliliters in 5 Ounces?

5 ounces = 147.87 ml in US measurement and 142.07 ml in UK measurement.

Ounces to Milliliters for Chemicals

Chemical solutions are frequently measured in milliliters, ensuring precision in scientific work.

How Many Milliliters in 3 Ounces?

3 ounces = 88.72 ml in US measurement and 85.24 ml in UK measurement.

Ounces to Milliliters for Laboratory Measurements

Scientific experiments require exact volume conversions between ounces and milliliters.

How Many Milliliters in 7 Ounces?

7 ounces = 207.01 ml in US measurement and 198.89 ml in UK measurement.

Ounces to Milliliters for Pharmaceuticals

Medicine bottles often list fluid ounces, making conversion crucial for accurate dosing.

How Many Milliliters in 9 Ounces?

9 ounces = 266.16 ml in US measurement and 255.72 ml in UK measurement.


By understanding ounces to milliliters conversion, you can ensure precise measurements in cooking, medicine, and everyday use.

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