How many ounces in 8 cups?

8 cups = 64 fl oz

128 Tbsp · 384 tsp · 1,893 mL

Measure with: 8 cups

Converter

8 cups = 64 fl oz

Fluid ounces: 64 fl oz
Cups: 8
Tablespoons: 128
Teaspoons: 384
Milliliters: 1,893 mL
Measure with: 8 cups

Other cup standards

US cups: 8 · nutrition-label cups (240 mL): 7.886 · metric cups (250 mL): 7.571 · UK fluid ounces: 66.61

US customary cup = 236.6 mL

Eight cups is 2 quarts, or half a gallon. If you track water in 8 fl oz glasses, eight glasses come to 64 fl oz, the same half gallon (64 oz to cups).

Counting in 500 mL bottles (16.9 fl oz each), 8 cups takes about 3.79 bottles. A full gallon is twice that, 16 cups (ounces in a gallon).

For baking, 8 cups of spooned all-purpose flour weighs about 960 g (33.86 oz by weight), a bit over 2 pounds.

Cups to fluid ounces, tablespoons and mL
Cups	Fluid ounces	Tablespoons	Teaspoons	mL
1/8 cup	1 fl oz	2	6	30
1/6 cup	1.33 fl oz	2.67	8	39
1/4 cup	2 fl oz	4	12	59
1/3 cup	2.67 fl oz	5.33	16	79
3/8 cup	3 fl oz	6	18	89
1/2 cup	4 fl oz	8	24	118
2/3 cup	5.33 fl oz	10.67	32	158
3/4 cup	6 fl oz	12	36	177
7/8 cup	7 fl oz	14	42	207
1 cup	8 fl oz	16	48	237
1 1/4 cups	10 fl oz	20	60	296
1 1/3 cups	10.67 fl oz	21.33	64	315
1 1/2 cups	12 fl oz	24	72	355
2 cups	16 fl oz	32	96	473
2 1/2 cups	20 fl oz	40	120	591
3 cups	24 fl oz	48	144	710
4 cups	32 fl oz	64	192	946
5 cups	40 fl oz	80	240	1,183
6 cups	48 fl oz	96	288	1,420
8 cups	64 fl oz	128	384	1,893
16 cups	128 fl oz	256	768	3,785

What 8 cups weighs

Weight of 8 cups by ingredient
Ingredient	8 cup	How measured
All-purpose flour	960 g · 33.86 oz	spooned into the cup and leveled
Granulated sugar	1,584 g · 55.87 oz	scooped and leveled
Brown sugar (packed)	1,704 g · 60.11 oz	packed firmly
Butter	1,814 g · 64 oz	cut at the Tbsp marks on the wrapper (1 stick = 1/2 cup)
Rolled oats	712 g · 25.12 oz	scooped and leveled
Water	1,888 g · 66.6 oz	liquid measuring cup

Questions

8 cups of water is how many ounces?

64 fl oz, which is half a gallon.

Is 8 cups half a gallon?

Yes. A US gallon is 16 cups, so 8 cups is exactly half.

How many 16.9 oz bottles make 8 cups?

About 3.79 bottles of 16.9 fl oz.

Sources: US customary units: NIST Handbook 44. How we calculate.