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Convertitive

US cups to US fluid ounces Converter

1 cup = 8 fl oz

1 US cup equals 8 US fluid ounces. To convert US cups to US fluid ounces, multiply the US cup value by 8. For quick reference: 1 cup = 8 fl oz, 5 cup = 40 fl oz, 10 cup = 80 fl oz, 100 cup = 800 fl oz.

8
FormulaUS fluid ounces = US cups × 8
Quick

How to convert US cups to US fluid ounces

  1. Take your value

    Start with your value in US cups.

  2. Multiply by 8

    Multiply the US cup value by 8. This is the exact conversion factor from US cups to US fluid ounces.

  3. Read the result

    The product is your value in US fluid ounces. For example, 5 cup × 8 = 40 fl oz.

Conversion formula

The exact factor from US cups to US fluid ounces is 8.

US fluid ounces = US cups × 8

US cups to US fluid ounces conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from US cups to US fluid ounces
US cups (cup)US fluid ounces (fl oz)
0.1 cup0.8 fl oz
0.25 cup2 fl oz
0.5 cup4 fl oz
1 cup8 fl oz
1.5 cup12 fl oz
2 cup16 fl oz
2.5 cup20 fl oz
3 cup24 fl oz
4 cup32 fl oz
5 cup40 fl oz
6 cup48 fl oz
7 cup56 fl oz
8 cup64 fl oz
9 cup72 fl oz
10 cup80 fl oz
12 cup96 fl oz
15 cup120 fl oz
20 cup160 fl oz
25 cup200 fl oz
30 cup240 fl oz
40 cup320 fl oz
50 cup400 fl oz
60 cup480 fl oz
75 cup600 fl oz
100 cup800 fl oz
125 cup1000 fl oz
150 cup1200 fl oz
200 cup1600 fl oz
250 cup2000 fl oz
300 cup2400 fl oz
400 cup3200 fl oz
500 cup4000 fl oz
600 cup4800 fl oz
750 cup6000 fl oz
1000 cup8000 fl oz
1500 cup12000 fl oz
2000 cup16000 fl oz
2500 cup20000 fl oz
3000 cup24000 fl oz
4000 cup32000 fl oz
5000 cup40000 fl oz
7500 cup60000 fl oz
10000 cup80000 fl oz
15000 cup120000 fl oz
20000 cup160000 fl oz
25000 cup200000 fl oz
30000 cup240000 fl oz
40000 cup320000 fl oz
50000 cup400000 fl oz
100000 cup800000 fl oz

Real-world reference

A standard US recipe cup of water is about 237 mL. Most US recipes call for cups; weighing in grams is more reliable. In US fluid ounces, that gives you: 1 cup = 8 fl oz, 10 cup = 80 fl oz, 100 cup = 800 fl oz.

Frequently asked questions

How many US fluid ounces are in 1 US cup?
1 US cup equals 8 US fluid ounces.
How do I convert US cups to US fluid ounces?
Multiply the US cup value by 8. So x cup × 8 = the equivalent in fl oz.
What is 5 US cups in US fluid ounces?
5 US cups equals 40 US fluid ounces.
What is 10 US cups in US fluid ounces?
10 US cups equals 80 US fluid ounces.
What is 100 US cups in US fluid ounces?
100 US cups equals 800 US fluid ounces.
How do I convert back from US fluid ounces to US cups?
Multiply the US fluid ounce value by 0.125. For example, 1 fl oz = 0.125 cup.
Is the US cup bigger than the US fluid ounce?
Yes. 1 US cup is larger than 1 US fluid ounce — specifically 8 times larger.
Are these conversion factors exact?
Yes. The factor of 8 is derived directly from the SI definitions of US cup and US fluid ounce.

About the US cup and the US fluid ounce

The US cup

The US legal cup, as used in nutrition labels, equals exactly 240 mL; the US customary cup, used in recipes, equals 236.5882365 mL (half a US liquid pint, or 8 US fluid ounces). Convertitive uses the customary value, which matches how most US cookbooks specify quantities. UK and Australian metric cups are 250 mL — yet another small but consequential difference.

The US fluid ounce

The US fluid ounce (fl oz) is a customary unit of volume equal to 1/128 of a US gallon, or about 29.5735 mL. It is the standard unit for liquid serving sizes on US nutrition labels. The US fluid ounce is slightly larger than the UK fluid ounce (28.4131 mL) — confusingly, the opposite direction from the gallons.

Related converters

US fluid ounces to US cups
fl oz → cup
Milliliters to Liters
mL → L
Milliliters to US gallons
mL → gal
Milliliters to US fluid ounces
mL → fl oz
Milliliters to US cups
mL → cup
Milliliters to US pints
mL → pt

Sources