Convert US Fluid Ounce to US Cup
1 us fluid ounce = 0.125 us cup (US cup). For example, 10 us fluid ounce = 1.25 us cup and 100 us fluid ounce = 12.5 us cup. Type any value below to convert us fluid ounce to us cup both ways — it runs entirely in your browser.
Quick answer: US Fluid Ounce to US Cup
1 US Fluid Ounce = 0.125US Cup (US fl oz → US cup). To convert us fluid ounce to us cup, multiply by 0.125. To convert us cup to us fluid ounce, multiply by 8. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common us fluid ounce-to-us cup questions.
How to convert US Fluid Ounce to US Cup
To convert us fluid ounce to us cup, multiply the number of us fluid ounce by the conversion factor 0.125, because 1 US fl oz = 0.125US cup. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 US cup = 8US fl oz, so you divide by 0.125 (or multiply by 8) to turn us cup back into us fluid ounce.
US cup = US fl oz × 0.125 ·
US fl oz = US cup × 8
- Write down the value you want to convert, in us fluid ounce.
- Multiply it by 0.125.
- The result is the same area/length/quantity expressed in us cup.
US Fluid Ounce to US Cup — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5us fluid ounce is 0.625us cup because 5 US fl oz × 0.125 = 0.625 US cup.
| US Fluid Ounce | Calculation | US Cup |
|---|---|---|
| 1US fl oz | 1 US fl oz × 0.125 = 0.125 US cup | 0.125US cup |
| 2US fl oz | 2 US fl oz × 0.125 = 0.25 US cup | 0.25US cup |
| 3US fl oz | 3 US fl oz × 0.125 = 0.375 US cup | 0.375US cup |
| 5US fl oz | 5 US fl oz × 0.125 = 0.625 US cup | 0.625US cup |
| 7US fl oz | 7 US fl oz × 0.125 = 0.875 US cup | 0.875US cup |
| 10US fl oz | 10 US fl oz × 0.125 = 1.25 US cup | 1.25US cup |
| 12US fl oz | 12 US fl oz × 0.125 = 1.5 US cup | 1.5US cup |
| 15US fl oz | 15 US fl oz × 0.125 = 1.875 US cup | 1.875US cup |
| 20US fl oz | 20 US fl oz × 0.125 = 2.5 US cup | 2.5US cup |
| 25US fl oz | 25 US fl oz × 0.125 = 3.125 US cup | 3.125US cup |
| 50US fl oz | 50 US fl oz × 0.125 = 6.25 US cup | 6.25US cup |
| 100US fl oz | 100 US fl oz × 0.125 = 12.5 US cup | 12.5US cup |
Common US Fluid Ounce to US Cup conversions
These are the us fluid ounce-to-us cup values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 us fluid ounce = 0.125 us cup
- 2 us fluid ounce = 0.25 us cup
- 2.5 us fluid ounce = 0.3125 us cup
- 3 us fluid ounce = 0.375 us cup
- 4 us fluid ounce = 0.5 us cup
- 5 us fluid ounce = 0.625 us cup
- 6 us fluid ounce = 0.75 us cup
- 7 us fluid ounce = 0.875 us cup
- 8 us fluid ounce = 1 us cup
- 9 us fluid ounce = 1.125 us cup
- 10 us fluid ounce = 1.25 us cup
- 12 us fluid ounce = 1.5 us cup
- 15 us fluid ounce = 1.875 us cup
- 20 us fluid ounce = 2.5 us cup
- 25 us fluid ounce = 3.125 us cup
- 30 us fluid ounce = 3.75 us cup
- 50 us fluid ounce = 6.25 us cup
- 75 us fluid ounce = 9.375 us cup
- 100 us fluid ounce = 12.5 us cup
- 200 us fluid ounce = 25 us cup
- 500 us fluid ounce = 62.5 us cup
- 1000 us fluid ounce = 125 us cup
US Fluid Ounce to US Cup conversion chart (both directions)
The chart below converts us fluid ounce to us cup and us cup to us fluid ounce side by side, so it works whichever way you need. 1 us fluid ounce = 0.125us cup, and 1 us cup = 8us fluid ounce.
| US Fluid Ounce → US Cup | US Cup → US Fluid Ounce |
|---|---|
| 0.25US fl oz = 0.03125US cup | 0.25US cup = 2US fl oz |
| 0.5US fl oz = 0.0625US cup | 0.5US cup = 4US fl oz |
| 1US fl oz = 0.125US cup | 1US cup = 8US fl oz |
| 2US fl oz = 0.25US cup | 2US cup = 16US fl oz |
| 3US fl oz = 0.375US cup | 3US cup = 24US fl oz |
| 4US fl oz = 0.5US cup | 4US cup = 32US fl oz |
| 5US fl oz = 0.625US cup | 5US cup = 40US fl oz |
| 6US fl oz = 0.75US cup | 6US cup = 48US fl oz |
| 7US fl oz = 0.875US cup | 7US cup = 56US fl oz |
| 8US fl oz = 1US cup | 8US cup = 64US fl oz |
| 9US fl oz = 1.125US cup | 9US cup = 72US fl oz |
| 10US fl oz = 1.25US cup | 10US cup = 80US fl oz |
| 12US fl oz = 1.5US cup | 12US cup = 96US fl oz |
| 15US fl oz = 1.875US cup | 15US cup = 120US fl oz |
| 20US fl oz = 2.5US cup | 20US cup = 160US fl oz |
| 25US fl oz = 3.125US cup | 25US cup = 200US fl oz |
| 30US fl oz = 3.75US cup | 30US cup = 240US fl oz |
| 40US fl oz = 5US cup | 40US cup = 320US fl oz |
| 50US fl oz = 6.25US cup | 50US cup = 400US fl oz |
| 75US fl oz = 9.375US cup | 75US cup = 600US fl oz |
| 100US fl oz = 12.5US cup | 100US cup = 800US fl oz |
| 150US fl oz = 18.75US cup | 150US cup = 1,200US fl oz |
| 200US fl oz = 25US cup | 200US cup = 1,600US fl oz |
| 250US fl oz = 31.25US cup | 250US cup = 2,000US fl oz |
| 500US fl oz = 62.5US cup | 500US cup = 4,000US fl oz |
| 1000US fl oz = 125US cup | 1000US cup = 8,000US fl oz |
US Fluid Ounce vs US Cup: which is bigger?
A us cup is the larger unit: one us cup equals 8 us fluid ounces. Put another way, you need 8 us fluid ounces to make a single us cup.
What is a US Fluid Ounce? History, origin and usage
The US fluid ounce is one sixteenth of a US pint and one one-hundred-twenty-eighth of the US gallon, deriving from the Queen Anne wine gallon kept by the United States. It is the liquid cousin of the avoirdupois ounce of weight, the shared name reflecting their common medieval origin.
The US fluid ounce labels American drink containers, spirits pours, baby-bottle volumes and many recipe ingredients. It is the small liquid unit Americans use before stepping up to cups and pints.
The US fluid ounce is slightly larger than the imperial fluid ounce, by about four percent, because the two systems define their pints and gallons differently. A US fluid ounce of water weighs a little more than one avoirdupois ounce.
What is a US Cup? History, origin and usage
The standardised cooking cup was popularised in the United States by Fannie Farmer, whose 1896 Boston Cooking-School Cook Book championed level, measured quantities instead of vague handfuls. The US customary cup was set at half a US pint, or eight US fluid ounces.
The cup is the backbone of American and Canadian home recipes, used for flour, sugar, liquids and almost everything else, with measuring cups a kitchen staple. Most of the rest of the world weighs dry ingredients instead, finding volume cups less precise for things like flour.
There are several competing cups: the US customary cup of about 237 millilitres, the US legal cup of 240 millilitres used on nutrition labels, and the metric cup of 250 millilitres common in Australia and the UK. This is why carefully following a recipe from another country can still go slightly wrong.
Convert 1 US Fluid Ounce to other units
It can help to see a us fluid ounce next to the other units it is commonly compared with. One us fluid ounce (US fl oz) is equal to:
| 1 US Fluid Ounce equals | Unit |
|---|---|
| 29.57353mL | Millilitre |
| 2.957353cL | Centilitre |
| 0.02957353L | Litre |
| 0.00002957353m³ | Cubic Metre |
| 29.57353cm³ | Cubic Centimetre |
| 1.804688in³ | Cubic Inch |
| 0.001044379ft³ | Cubic Foot |
| 0.0078125US gal | US Gallon |
| 0.0078125gal | US Gallon |
| 0.03125US qt | US Quart |
| 0.03125qt | US Quart |
| 0.0625US pt | US Pint |
| 0.0625pt | US Pint |
| 1fl oz | US Fluid Ounce |
| 1.040843imp fl oz | Imperial Fluid Ounce |
| 2tbsp | US Tablespoon |
| 6tsp | US Teaspoon |
| 0.25gi | US Gill |
| 0.0008392256bu | US Bushel |
| 0.0001860119bbl | Oil Barrel |
| 29,573.53µL | Microlitre |
| 0.125US cup | US Cup |
| 1US fl oz | US Fluid Ounce |
Convert 1 US Cup to other units
One us cup (US cup) is equal to:
| 1 US Cup equals | Unit |
|---|---|
| 236.5882mL | Millilitre |
| 23.65882cL | Centilitre |
| 0.2365882L | Litre |
| 0.0002365882m³ | Cubic Metre |
| 236.5882cm³ | Cubic Centimetre |
| 14.4375in³ | Cubic Inch |
| 0.008355035ft³ | Cubic Foot |
| 0.0625US gal | US Gallon |
| 0.0625gal | US Gallon |
| 0.25US qt | US Quart |
| 0.25qt | US Quart |
| 0.5US pt | US Pint |
| 0.5pt | US Pint |
| 8US fl oz | US Fluid Ounce |
| 8fl oz | US Fluid Ounce |
| 8.326742imp fl oz | Imperial Fluid Ounce |
| 16tbsp | US Tablespoon |
| 48tsp | US Teaspoon |
| 2gi | US Gill |
| 0.006713805bu | US Bushel |
| 0.001488095bbl | Oil Barrel |
| 236,588.2µL | Microlitre |
| 8US fl oz | US Fluid Ounce |
Tips for converting US Fluid Ounce to US Cup
- To go from us fluid ounce to us cup, multiply by 0.125; to go back, divide by 0.125 (or multiply by 8).
- For a quick mental estimate, remember that 1 us fluid ounce ≈ 0.125 us cup, so 10 us fluid ounce ≈ 1.25 us cup.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this US Fluid Ounce to US Cup converter
Type a number into the US Fluid Ounce field and the equivalent in US Cup appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the US Cup field to convert the other way (us cup to us fluid ounce). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 US fl oz = 0.125US cup), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for us fluid ounce-to-us cup conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Watch the system: a <strong>US</strong> gallon, quart, pint and fluid ounce are <strong>not</strong> the same size as the <strong>imperial (UK)</strong> ones — a US gallon is 3.785 L while an imperial gallon is 4.546 L, and a US fluid ounce (29.57 mL) is slightly larger than an imperial fluid ounce (28.41 mL). The units on this page are labelled US or Imperial so the result is unambiguous.
Frequently asked questions
- How many us cup are in 1 us fluid ounce?
- 1 us fluid ounce = 0.125 us cup (US cup). To convert any number of us fluid ounce to us cup, multiply by 0.125.
- How do I convert us fluid ounce to us cup?
- Multiply the number of us fluid ounce by 0.125. For example, 10 us fluid ounce = 10 × 0.125 = 1.25 us cup, and 25 us fluid ounce = 3.125 us cup.
- How many us fluid ounce are in 1 us cup?
- 1 us cup = 8 us fluid ounce. So to convert us cup back to us fluid ounce, multiply by 8.
- What is the formula to convert us fluid ounce to us cup?
- us cup = us fluid ounce × 0.125. The reverse formula is us fluid ounce = us cup × 8.
- How much is 100 us fluid ounce in us cup?
- 100 us fluid ounce = 12.5 us cup. (And 1000 us fluid ounce = 125 us cup.)
- Which is bigger, a us fluid ounce or a us cup?
- A us cup is larger: 1 us cup = 8 us fluid ounce.
- Is this us fluid ounce to us cup converter accurate?
- Yes — every value is computed from the exact 0.125 US cup per US fl oz factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert us cup to us fluid ounce too?
- Yes. The converter works both ways — enter a value in either field. 1 us cup = 8 us fluid ounce.