½ cup of water in ounces
½ cup of water ≈ 4.18 oz = 119 g · 118 mL by volume · at 237 g per cup, spooned and leveled. Use the converter below for any amount or ingredient.
Result: …
Formula
grams = cups × 237 (water) ; ounces = grams ÷ 28.3495
Why weight beats volume for water
A cup is a volume; a recipe cares about mass. Water runs about 237 g per US cup measured spoon-and-level, but packing, humidity, and grind can move that by ±10%. Weighing removes the guesswork, which is exactly why serious baking recipes list grams.
Water: cups to ounces table
| Amount | Grams | Ounces |
|---|---|---|
| ¼ cup | 59 g | 2.09 oz |
| ⅓ cup | 79 g | 2.79 oz |
| ½ cup (this page) | 119 g | 4.18 oz |
| ⅔ cup | 158 g | 5.57 oz |
| ¾ cup | 178 g | 6.27 oz |
| 1 cup | 237 g | 8.36 oz |
| 1½ cups | 356 g | 12.54 oz |
| 2 cups | 474 g | 16.72 oz |
| 3 cups | 711 g | 25.08 oz |
Frequently asked questions
How many ounces is ½ cup of water?
½ cup of water is about 4.18 oz (119 g), based on 237 g per US cup, measured spoon-and-level.
Why does the ingredient change the answer?
Cups measure volume, grams measure weight. Dense ingredients pack more weight into the same cup: a cup of honey is 340 g while a cup of rolled oats is only 90 g. That is why generic cup-to-gram converters get recipes wrong.
Does it matter how I fill the cup?
Yes, these figures assume you spoon the ingredient into the cup and level it off. Scooping, packing, or tapping the cup can change the weight by 10% or more, which is why bakers prefer a scale.
Is this a US cup or a metric cup?
A US customary cup (236.6 mL). A metric cup is 250 mL, about 5.7% bigger, and old UK recipes use a 284 mL imperial cup. ½ cup here is 118 mL by volume.