Convert Fluid Ounces (US) to Cups
Convert Fluid Ounces (US) to Cups instantly. 1 Fluid Ounce (US) (fl oz) equals 0.125 Cups (cup).
Fluid Ounces (US) to Cups conversion table
| Fluid Ounces (US) (fl oz) | Cups (cup) |
|---|---|
| 1 fl oz | 0.125 cup |
| 2 fl oz | 0.25 cup |
| 3 fl oz | 0.375 cup |
| 5 fl oz | 0.625 cup |
| 10 fl oz | 1.25 cup |
| 20 fl oz | 2.5 cup |
| 50 fl oz | 6.25 cup |
| 100 fl oz | 12.5 cup |
| 500 fl oz | 62.5 cup |
| 1,000 fl oz | 125 cup |
1 Fluid Ounce (US) = 0.125 Cups · multiply Fluid Ounces (US) by 0.125
About converting Fluid Ounces (US) to Cups
Fluid Ounces (US) (fl oz) and Cups (cup) are both units of volume, so converting between them is a single multiplication: multiply your Fluid Ounces (US) figure by 0.125. Ten Fluid Ounces (US) comes to 1.25 Cups, and a hundred works out at 12.5 Cups.
Rule of thumb: going from Fluid Ounces (US) to Cups divides, so the figure always shrinks — it takes about 8 Fluid Ounces (US) to make a single Cup. If your answer came out bigger, you have the conversion the wrong way round.
What is a Fluid Ounce (US)?
A fluid ounce measures volume, not weight, despite sharing a name with the ounce on a kitchen scale — the two are related only loosely, through the weight of water. The US and imperial fluid ounces are different sizes, and counterintuitively the imperial one is the smaller, even though the imperial gallon is the bigger of the two: the imperial gallon divides into 160 fluid ounces, the US gallon into just 128. The gap is small enough to slip past a reader and large enough to matter, which makes it a reliable trap in cocktail recipes and drink can sizes.
What is a Cup?
The cup is a cooking unit and nothing else — no scientific or trade use — and it is dangerously ambiguous. The US customary cup in recipes is about 237 mL, the metric cup used in Australia and much of Europe is exactly 250 mL, and the US legal cup that nutrition labels are calculated against is 240 mL, different again from the one in the cookbook. Recipes almost never say which they mean. The problem compounds for dry goods, since a cup measures volume while baking actually depends on mass: how hard you pack the flour changes the answer.
To put both in perspective: a US shot of spirits is about one and a half fluid ounces, while a cup is the measure American recipes count flour in.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Cups to Fluid Ounces (US) converter, or browse all Volume converters.
Frequently asked questions
How many Cups are in one Fluid Ounce (US)?
There are 0.125 Cups in one Fluid Ounce (US).
How do I convert Fluid Ounces (US) to Cups?
Multiply the number of Fluid Ounces (US) by 0.125. For example, 10 Fluid Ounces (US) = 1.25 Cups.
What is 100 Fluid Ounces (US) in Cups?
100 Fluid Ounces (US) is equal to 12.5 Cups.
How do I convert Cups to Fluid Ounces (US)?
Multiply the Cups value by 8 (or divide by 0.125).
Is this Fluid Ounces (US) to Cups conversion exact?
The definition is exact — Fluid Ounces (US) and Cups are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is a Fluid Ounce (US)?
A fluid ounce measures volume, not weight, despite sharing a name with the ounce on a kitchen scale — the two are related only loosely, through the weight of water. The US and imperial fluid ounces are different sizes, and counterintuitively the imperial one is the smaller, even though the imperial gallon is the bigger of the two: the imperial gallon divides into 160 fluid ounces, the US gallon into just 128. The gap is small enough to slip past a reader and large enough to matter, which makes it a reliable trap in cocktail recipes and drink can sizes.
What is a Cup?
The cup is a cooking unit and nothing else — no scientific or trade use — and it is dangerously ambiguous. The US customary cup in recipes is about 237 mL, the metric cup used in Australia and much of Europe is exactly 250 mL, and the US legal cup that nutrition labels are calculated against is 240 mL, different again from the one in the cookbook. Recipes almost never say which they mean. The problem compounds for dry goods, since a cup measures volume while baking actually depends on mass: how hard you pack the flour changes the answer.