Simple Oz to mL Calculator & Conversion Table

Most American or American recipes use fluid ounces (oz) to measure cooking liquids. Below is a handy table and graph for calculating how many ounces are in a cup. You can also use the table to convert from oz to ml or from imperial to metric.

oz to ml to cup conversion table

It is important to note that the table below uses the US standard cup when converting ounces to ml.

Oz US Standard Cups milliliters
1 fluid ounce 0.125 29,574 ml
2 fluid ounces 1/4 cup 59,147 ml
3 fluid ounces 0.375 88,721 mL
4 fluid ounces 1/2 cup 4 ounces
5 fluid ounces 0.625 5 oz
6 fluid ounces 3/4 cup 177.44 ml
7 fluid ounces 0.875 207.01ml
8 fluid ounces 1 cup 8 ounces
9 fluid ounces 1.13 266.16ml
10 fluid ounces 1.25 295.74ml
12 fluid ounces 1 1/2 cups 12 ounces
14 fluid ounces 1.75 414.03ml
16 fluid ounces 2 cups 473.18ml
18 fluid ounces 2.25 532.32ml
1.25 pints 2 1/2 cups 591.47ml
1.75 pints 3.5 828.06ml

Different cup (unit) sizes in the US

In the United States, two main cup volumes are used:

  • Customary Cup – half a liquid pint (236 mL) and is the traditional measure.
  • legal cup – used in the United States for nutrition labeling and defined in United States law as 240 ml.

TO cup of coffee in the US, on the other hand, is typically 4 fluid ounces (118 ml), which is made with 5 fluid ounces (148 ml) of water.

Ounces to cups calculator and converter

You can also use this calculator below to convert ounces to cups:

General FAQ

Is 1 ounce the same as 30ml?

Yes, it is a very close approximation. You can use 1 fl. oz. = 30 ml to convert.

How many ounces in a cup?

Eight ounces is equal to one cup.


Mr. Scott Purcell, CFA

Scott Purcell is co-founder of Man of Many and a CFA Charterholder. Scott graduated with a Bachelor of Commerce from the University of Sydney with a concentration in Finance and International Business. Prior to starting Man of Many, Scott spent 7 years at Westpac Institutional Bank as a Senior Financial Analyst. Scott was named a finalist for Publishing Leader of the Year at the Mumbrella Publish Awards for 2021, as a finalist at the NSW Business Chamber Awards for Young Entrepreneur in 2017 and brings extensive business and financial experience to the media industry. Scott specializes in technology, finance, whiskey, and general lifestyle content.

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