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Convert US Cups to US Fluid Ounces

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Measurement

Volume Converter
10 sig. figures
Formula1 US cup ร— 8 = 8 US fl oz
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About Volume Conversions

Volume trips people up because US customary and imperial units share names but not sizes. A US gallon (3.785 liters) runs about 17% smaller than an imperial gallon (4.546 liters), and the gap carries down into pints, quarts, and fluid ounces. Cooking is where it bites: a British recipe's pint of milk is 568 ml, an American pint only 473 ml. Science sidesteps the mess with metric volume, where 1 mL equals exactly 1 cmยณ. US and imperial variants stay separate below, with exact conversion chains holding precision across the swap.

Quick Conversions

US CupsUS Fluid Ounces
1 US cup8 US fl oz
2 US cup16 US fl oz
5 US cup40 US fl oz
10 US cup80 US fl oz
25 US cup200 US fl oz
50 US cup400 US fl oz
100 US cup800 US fl oz
250 US cup2000 US fl oz
500 US cup4000 US fl oz
1000 US cup8000 US fl oz
Unit NameSymbolPer 1 US Cup
Cubic Centimetercmยณ236.588
Cubic Footftยณ0.00835503
Cubic Inchinยณ14.4375
Cubic Metermยณ0.000236588
Imperial Fluid Ounceimp fl oz8.32674
Imperial Gallonimp gal0.0520421
Imperial Pintimp pt0.416337
LiterL0.236588
MillilitermL236.588
US CupUS cup1
US Fluid OunceUS fl oz8
US GallonUS gal0.0625
US PintUS pt0.5
US QuartUS qt0.25
US TablespoonUS tbsp16
US TeaspoonUS tsp48

Frequently Asked Questions

How do I convert US Cups to US Fluid Ounces?

To convert US Cups to US Fluid Ounces, use the conversion where 1 US Cup (US cup) = 8 US Fluid Ounces (US fl oz). For example, 1 US Cup = 8 US Fluid Ounces.

What are common US Cup to US Fluid Ounce conversions?

Here are common conversions: 1 US Cups = 8 US Fluid Ounces, 5 US Cups = 40 US Fluid Ounces, 10 US Cups = 80 US Fluid Ounces, 25 US Cups = 200 US Fluid Ounces, 50 US Cups = 400 US Fluid Ounces, 100 US Cups = 800 US Fluid Ounces.

When would I need to convert US Cups to US Fluid Ounces?

Volume conversions come up when scaling recipes between metric (milliliters, liters) and US customary units (cups, fluid ounces), calculating fuel tank capacities across regions, and in chemistry and manufacturing where a precise liquid measurement decides the outcome.

How precise are the conversions?

All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.

Sources

Read our full methodology โ†’