Convert Fluid Ounces to Cups
Instantly convert Fluid Ounces (fl oz) to Cups (cup) with our free online calculator.
Formula: fl oz to cup — multiply by 0.125
Reference Table
| Fluid Ounces (fl oz) | Cups (cup) |
|---|---|
| 1 | 0.125 |
| 5 | 0.625 |
| 10 | 1.25 |
| 25 | 3.125 |
| 50 | 6.25 |
| 100 | 12.5 |
How to Convert Fluid Ounces to Cups
Formula
To convert Fluid Ounces (fl oz) to Cups (cup): multiply by 0.125
Step-by-Step
- Start with your value in Fluid Ounces (fl oz).
- Multiply by 0.125 to perform the conversion.
- The result is your value expressed in Cups (cup).
Conversion Factor
1 fl oz = 0.125 cup
Reverse Factor
1 cup = 8 fl oz
Worked Example
Convert 25 Fluid Ounces to Cups: 25 fl oz = 3.125 cup
About Fluid Ounce (fl oz)
A US customary unit of liquid volume equal to exactly 1/128 of a US gallon (≈ 29.5735 mL). Fluid ounces are the universal US small-liquid-volume retail unit: beverage containers (a standard US Coke can is 12 fl oz, a Starbucks Grande is 16 fl oz, Trenta 30 fl oz), shampoo / lotion / personal-care bottles, US cocktail and bartending recipes (1.5 fl oz is the standard 'jigger' shot), wine pours (a standard restaurant pour is 5 fl oz; a generous home pour 6 fl oz), and home-cooking liquid measurements. **Important**: the US fluid ounce (29.5735 mL) is NOT the same as the UK Imperial fluid ounce (28.4131 mL) — the ~4% difference is usually inconsequential at consumer level but matters when scaling industrial formulations. The US fluid ounce is also distinct from the avoirdupois ounce (a weight unit ≈ 28.35 g), although for plain water the numerical values happen to coincide closely (1 US fl oz of water ≈ 1.04 oz mass).
About Cup (cup)
A US customary unit of volume equal to exactly 8 US fluid ounces or ≈ 236.588 mL. Cups are the dominant measurement unit in American home cooking and published US recipes per the USDA Recipe Standardization guidelines and most major US recipe-publishers (Food Network, NYT Cooking, Bon Appétit, Joy of Cooking): a standard US measuring cup set includes 1, 1/2, 1/3, and 1/4 cup nesting scoops. Outside North America, recipes typically use grams (solids) and millilitres (liquids), making cup → mL one of the most-needed kitchen conversions for international cooks working from American cookbooks. **Important**: cup sizes are NOT internationally uniform — the US cup is 236.6 mL, the Imperial cup (UK) is 284 mL but rarely used in modern UK recipes, the metric cup (Australia, NZ) is 250 mL, and the Japanese cup (gō, 合) is 180 mL. A recipe saying '1 cup' without identifying its origin can lead to ±25% measurement errors, especially impactful in baking where ratios matter.
Quick Facts
- 1 Fluid Ounce equals 0.125 Cups
- 1 Cup equals 8 Fluid Ounces
- Fluid Ounce is a unit of volume
- Cup is a unit of volume
- This conversion is commonly used in cooking, chemistry, fluid mechanics, and everyday liquid measurement
- The Fluid Ounce belongs to the imperial system
Common Fluid Ounce to Cup Conversions
| Fluid Ounces (fl oz) | Cups (cup) |
|---|---|
| 0.01 | 0.00125 |
| 0.1 | 0.0125 |
| 0.25 | 0.03125 |
| 0.5 | 0.0625 |
| 1 | 0.125 |
| 2 | 0.25 |
| 3 | 0.375 |
| 5 | 0.625 |
| 10 | 1.25 |
| 15 | 1.875 |
| 20 | 2.5 |
| 25 | 3.125 |
| 50 | 6.25 |
| 75 | 9.375 |
| 100 | 12.5 |
| 250 | 31.25 |
| 500 | 62.5 |
| 1000 | 125 |
| 5000 | 625 |
| 10000 | 1250 |
Understanding Fluid Ounces
The Fluid Ounce (symbol: fl oz) is a unit of volume. A US customary unit of liquid volume equal to exactly 1/128 of a US gallon (≈ 29.5735 mL). Fluid ounces are the universal US small-liquid-volume retail unit: beverage containers (a standard US Coke can is 12 fl oz, a Starbucks Grande is 16 fl oz, Trenta 30 fl oz), shampoo / lotion / personal-care bottles, US cocktail and bartending recipes (1.5 fl oz is the standard 'jigger' shot), wine pours (a standard restaurant pour is 5 fl oz; a generous home pour 6 fl oz), and home-cooking liquid measurements. **Important**: the US fluid ounce (29.5735 mL) is NOT the same as the UK Imperial fluid ounce (28.4131 mL) — the ~4% difference is usually inconsequential at consumer level but matters when scaling industrial formulations. The US fluid ounce is also distinct from the avoirdupois ounce (a weight unit ≈ 28.35 g), although for plain water the numerical values happen to coincide closely (1 US fl oz of water ≈ 1.04 oz mass).
It belongs to the imperial measurement system.
Fluid Ounces are commonly used in cooking, chemistry, fluid mechanics, and everyday liquid measurement.
Understanding Cups
The Cup (symbol: cup) is a unit of volume. A US customary unit of volume equal to exactly 8 US fluid ounces or ≈ 236.588 mL. Cups are the dominant measurement unit in American home cooking and published US recipes per the USDA Recipe Standardization guidelines and most major US recipe-publishers (Food Network, NYT Cooking, Bon Appétit, Joy of Cooking): a standard US measuring cup set includes 1, 1/2, 1/3, and 1/4 cup nesting scoops. Outside North America, recipes typically use grams (solids) and millilitres (liquids), making cup → mL one of the most-needed kitchen conversions for international cooks working from American cookbooks. **Important**: cup sizes are NOT internationally uniform — the US cup is 236.6 mL, the Imperial cup (UK) is 284 mL but rarely used in modern UK recipes, the metric cup (Australia, NZ) is 250 mL, and the Japanese cup (gō, 合) is 180 mL. A recipe saying '1 cup' without identifying its origin can lead to ±25% measurement errors, especially impactful in baking where ratios matter.
It belongs to the imperial measurement system.
Cups are commonly used in cooking, chemistry, fluid mechanics, and everyday liquid measurement.
Why Convert Fluid Ounces to Cups?
Volume conversions between Fluid Ounces and Cups are essential in cooking, chemistry, and fluid mechanics. Recipes from different countries use different measurement systems, laboratory procedures reference varying units, and engineers designing fluid systems need precise volume calculations for pipes, tanks, and pumps.
Frequently Asked Questions
How do I convert Fluid Ounces to Cups?
A US customary unit of liquid volume equal to exactly 1/128 of a US gallon (≈ 29. To convert Fluid Ounces to Cups, multiply by 0.125. For example, 25 fl oz equals 3.125 cup.
How many Cups are in 1 Fluid Ounce?
There are 0.125 Cups in 1 Fluid Ounce.
How many Fluid Ounces are in 1 Cup?
There are 8 Fluid Ounces in 1 Cup.
What is the formula for Fluid Ounce to Cup conversion?
The formula is: multiply by 0.125. This means 1 fl oz = 0.125 cup.
Is a Fluid Ounce bigger than a Cup?
Yes. One Fluid Ounce is larger than one Cup because 1 fl oz equals 0.125 cup, which is less than 1.
When do you need to convert between Fluid Ounces and Cups?
A US customary unit of volume equal to exactly 8 US fluid ounces or ≈ 236. Fluid Ounce and Cup are both volume units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.