Millilitres (ml) to Ounces (oz) Converter

Need a fast and reliable way to convert millilitres (ml) to fluid ounces (fl oz)? You’re in the right place.

This free online converter makes it easy to calculate ml to oz in seconds. Whether you’re preparing product formulations, adjusting packaging sizes, or simply measuring liquids for recipes, we’ve got you covered.

It supports both US fluid ounces (US fl oz) and UK fluid ounces (UK fl oz)—helping you avoid any cross-Atlantic measurement confusion. Just enter your value and see instant results.

Table of Content

What is a millilitre (ml)?

A millilitre (ml) is a unit of volume in the metric system, commonly used for measuring liquids in smaller quantities. It’s part of the SI system and is equivalent to:

  • 0.034 US fl oz
  • 0.035 UK fl oz
  • 0.001 litres (L)
  • 1 cm³ (cubic centimetre)
  • 1 × 10⁻⁶ m³ (cubic metre)
  • 0.061 cubic inches (cu in)

💡 Fun fact: The term “litre” originates from the Byzantine Greek word “litron,” where it was originally a unit of weight.

What is a fluid ounce (fl oz)?

A fluid ounce measures the volume of a liquid. Its size varies between systems:

  • 1 US fl oz = 29.5735 ml
  • 1 UK (Imperial) fl oz = 28.4131 ml

This difference stems from historical definitions. The US fl oz is based on the wine gallon (231 cubic inches), while the UK fl oz comes from the Imperial gallon (160 fl oz).

Why use our ml to oz converter?

Unlike manual calculations, our tool instantly shows the result and handles both measurement systems automatically. Perfect for:

No more guesswork. No more errors.

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FAQs

Q1. How to convert oz to ml?

To convert fluid ounces (fl oz) to millilitres (ml):

  1. Determine the number of ounces you want to convert.
  2. For US fluid ounces, multiply the amount by 29.57.
  3. For UK (Imperial) fluid ounces, multiply the amount by 28.41.
  4. That’s it—your volume is now in millilitres.

Q2. How to convert ml to oz?

To convert millilitres (ml) to fluid ounces (fl oz):

  1. Measure the volume you need in millilitres.
  2. For UK (Imperial) fluid ounces, divide the ml value by 28.41.
  3. For US fluid ounces, divide the ml value by 29.57.
  4. Your result is now in fluid ounces—simple and accurate.

Q3. How to convert 4 oz to ml?

To work out how many millilitres are in 4 fluid ounces:

  1. First, check which fluid ounce system applies—US or UK (Imperial).
  2. For US fluid ounces, multiply 4 by 29.57.
  3. For UK fluid ounces, multiply 4 by 28.41.
  4. Result: 4 US fl oz = 118.28 ml, and 4 UK fl oz = 113.64 ml.

Enter the value in millilitres (ml) below and select output units. The result will update automatically.