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Cups and Ounces (oz) Converter

icon of a cup

Use this calculator tool to convert between cups and ounces (dry or fluid). If converting cups and dry ounces (oz), you will need to choose an ingredient or enter a density figure.. A reference table of common ingredients and their dry ounce conversion for 1 cup, 1/2 cup, 1/3 cup, etc, can be found further down the page.

Please choose a cooking ingredient. A density is required for converting between cups and dry ounces (a cup of sugar weighs less than a cup of water). If your ingredient is not on the list, or you wish to enter your own density figure, click 'add own'.

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Disclaimer

Whilst every effort has been made in building this cups and ounces converter, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and information derived from the web site. This cups and ounces converter is here purely as a service to you, please use it at your own risk. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate conversions.

Please see the full disclaimer for more information.


Common Conversions Involving Cups and Ounces

The information below references the US cup (236.588mL) and the fluid ounce (fl oz). If you're referencing the dry ounce instead, your answer will dependent on the ingredient in your cup (as the density of the ingredient is important in this conversion). So, you'll need to see the section further down on converting between cups and dry ounces.

1/2 cup to oz (fluid)

If converting between cups and liquid ounces, there are 4 ounces in 1/2 cup.

1/3 cup to oz (fluid)

If converting between cups and liquid ounces, there are 2.67 ounces in 1/3 cup.

1/4 cup to oz (fluid)

If converting between cups and liquid ounces, there are 2 ounces in 1/4 cup.

Cups to Ounces (Fluid) Chart

The infographic below shows measurements for cups to ounces, tablespoons, teaspoons and milliliters. Note that all figures are rounded to the nearest whole number.

Cups to ounces, tablespoons and teaspoons chart

Converting Between Cups and Dry Ounces (oz)

If you want to convert between cups and dry ounces (oz), it's important to note that the cup (US, UK or metric) is a unit of volume and the dry ounce (oz) is a unit of weight. This means that to make the conversion, you need a substance density figure. As a very crude example, a cup full of sugar will weigh less than a cup full of olive oil because olive oil is a denser substance.

I've given a list of ingredients to choose from. However, please be aware that these are approximations - different brands of ingredients will vary to a small extent. This means that the results you receive will be estimations. The ingredient densities were sourced from the Food and Agricultural Organisation of the United Nations as well as other sources. A full list of these is available on the baking ingredient conversions page.

Weights of Common Ingredients In Ounces (oz)

Ingredient 1 Cup
(US)
1/2 Cup
(US)
1/3 Cup
(US)
1/4 Cup
(US)
Flour (plain)
(529g/L)
4.41 oz 2.21 oz 1.47 oz 1.1 oz
Flour (self-raising)
(529g/L)
4.41 oz 2.21 oz 1.47 oz 1.1 oz
Flour (bread)
(550g/L)
4.48 oz 2.24 oz 2.21 oz 1.12 oz
Butter
(959g/L)
8 oz 4 oz 2.67 oz 2 oz
Honey
(1420g/L)
11.85 oz 5.93 oz 3.95 oz 2.96 oz
Margarine
(973g/L)
8.1 oz 4.05 oz 2.7 oz 2 oz
Milk
(1035g/L)
8.64 oz 4.32 oz 2.88 oz 2.16 oz
Oats
(432g/L)
3.6 oz 1.8 oz 1.2 oz 0.9 oz
Sugar (granulated)
(849g/L)
7.09 oz 3.55 oz 2.36 oz 1.77 oz
Sugar (brown)
(850g/L)
7.05 oz 3.53 oz 2.35 oz 1.76 oz
Sugar (caster)
(801g/L)
6.68 oz 3.34 oz 2.23 oz 1.67 oz
Sugar (icing)
(561g/L)
4.68 oz 2.34 oz 1.56 oz 1.17 oz

Which Cup Should I Use?

As you'll have noticed from the list of conversion options above, there are several different types of cup depending on where in the world you are. Some clarification is included in my forum post, how many ounces are in a cup?

Converting Between Other Cooking Units

To convert between other cooking units such as grams, pounds, quarts, tablespoons, teaspoons, litres and more, give the cooking converter a try. You can also convert directly between cups and grams, cups and mL and ounces and mL.