oz to cups converter

Eight US fluid ounces to the cup, exactly. This converts liquid ounces either way and shows millilitres too — but note it is fluid ounces by volume, not the ounce on a scale.

Cups (US)

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US cups—
Millilitres—
Tablespoons—
US pints—
US fluid ounces—

Fluid ounces (US) to cups (US)

Fluid ounces (US)Cups (US)
1 fl oz0.125 cup
2 fl oz0.25 cup
3 fl oz0.375 cup
4 fl oz0.5 cup
5 fl oz0.625 cup
6 fl oz0.75 cup
8 fl oz1 cup
10 fl oz1.25 cup
12 fl oz1.5 cup
14 fl oz1.75 cup
16 fl oz2 cup
20 fl oz2.5 cup
24 fl oz3 cup
32 fl oz4 cup
48 fl oz6 cup
64 fl oz8 cup
128 fl oz16 cup

Cups (US) to fluid ounces (US)

Cups (US)Fluid ounces (US)
0.125 cup1 fl oz
0.25 cup2 fl oz
0.333 cup2.664 fl oz
0.5 cup4 fl oz
0.667 cup5.336 fl oz
0.75 cup6 fl oz
1 cup8 fl oz
1.5 cup12 fl oz
2 cup16 fl oz
3 cup24 fl oz
4 cup32 fl oz
8 cup64 fl oz
16 cup128 fl oz

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Fluid ounces, not weight ounces

A US cup is 8 US fluid ounces — a volume, 236.59 ml. The ounce on a kitchen scale is a weight, 28.35 g, and a cup of flour weighs about 4.4 of them while a cup of water weighs 8.3. So “8 oz of flour” in a British recipe is a weight and is not one cup; use the grams to cups converter for dry ingredients. This page is for liquids and anything sold by fluid ounce: milk, stock, juice, cream.

cups (US) = fluid ounces (US) ÷ 8   |   fluid ounces (US) = cups (US) × 8

Bottle and carton sizes

A 12 fl oz can is 1½ cups; a 16 fl oz bottle is 2 cups (a US pint); a 32 fl oz carton of stock is 4 cups (a quart); a half-gallon of milk is 64 fl oz, 8 cups. UK fluid ounces are 4% smaller, so a UK pint of 20 fl oz is 2.4 US cups, not 2.5.

Frequently asked questions

How many cups (US) are in 1 US fluid ounce?
One US fluid ounce is 0.125 cups (US) — an exact figure, because both units are pinned to the same definition.
What is 8 fluid ounces (US) in cups (US)?
8 fluid ounces (US) is 1 cups (US).
How do I convert fluid ounces (US) to cups (US)?
Divide by 8. To go back, multiply cups (US) by 8. The calculator does both directions and shows the working under the result.
How many fluid ounces (US) are in 1 US cup?
One US cup is 8 fluid ounces (US).
Is 8 oz of flour one cup?
No. 8 ounces of flour by weight is about 1.8 cups. The 8-ounces-to-a-cup rule is for fluid ounces (volume), which only matches weight for water-like liquids.

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