Convert Water from Ounces to Cup

How many cups is 1 ounce of water?

1 ounce of water (H2O) is 0.11 cups. 2 ounces of water is 0.23 cups. 1/2 ounce of water is 0.06 cups. 1/4 ounce (0.25 ounce) of water is 0.03 cups. Use the converter below for any amount.

  • These figures use the metric cup (250 ml). A US cup is slightly smaller at 240 ml, so it holds a little less. Use the US cup converter →
  • Cup sizes are not standard worldwide, so the same cup of an ingredient can weigh more or less depending on the country. What is a cup measurement →

Water is the most fundamental ingredient in cooking and baking. Used to hydrate doughs and batters, cook pasta and grains, make stocks and sauces, and dissolve ingredients, it appears in almost every recipe in some form. One metric cup (250 ml) of water weighs exactly 250 grams or 8.82 ounces — a clean, round number because the gram was originally defined as the mass of one millilitre of water.

Many recipes — particularly from the US — list water in cups or fluid ounces, while others use millilitres or grams. This page lets you convert water between grams, cups, millilitres, fluid ounces, and more so you can match any recipe with whatever measuring equipment you have.

Also known as

  • H2O
  • drinking water
  • tap water
  • filtered water

No scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.

Water Measurement Converter

Enter a value and pick your units.

Result

0 Cup

Common Water Conversions

Here are the most common water conversions from ounces to cups.

OuncesCups
1 oz0.11 cups
2 oz0.23 cups
3 oz0.34 cups
4 oz0.45 cups
5 oz0.57 cups
6 oz0.68 cups
8 oz0.91 cups
10 oz1.13 cups
12 oz1.36 cups

Water Conversion Chart

The conversion chart below gives a quick reference for converting water from Ounces to Cup and other measurements.

ouncescupgramscup(US)tbsptspmlfl oz
2.5 oz0.28 cup70.86 g0.3 cup (US)4.72 tbsp14.17 tsp70.86 ml2.4 fl oz
5 oz0.57 cup141.72 g0.59 cup (US)9.45 tbsp28.34 tsp141.72 ml4.79 fl oz
7.5 oz0.85 cup212.59 g0.89 cup (US)14.17 tbsp42.52 tsp212.59 ml7.19 fl oz
10 oz1.13 cup283.45 g1.18 cup (US)18.9 tbsp56.69 tsp283.45 ml9.59 fl oz

Frequently Asked Questions

How many cups is 1 ounce of water?
1 ounce of water is 0.11 cups. The ratio is fixed, so 2 ounces of water is 0.23 cups and 0.5 ounces is 0.06 cups. Use the converter above for any quantity, or check the conversion chart on this page for the most common amounts at a glance. Open the water converter
How many cups is 1.5 ounces of water?
1.5 ounces of water is 0.17 cups. The ratio is fixed, so 1 ounce of water is 0.11 cups and 2 ounces is 0.23 cups. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
How many cups is 2 ounces of water?
2 ounces of water is 0.23 cups. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 ounce of water is 0.11 cups, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact cups reading.
How many ounces of water is 0.11 cups?
0.11 cups of water is 0.97 ounces. The conversion works the same in reverse, so you can switch between cups and ounces without changing the result. This helps when a recipe lists ounces but you would rather weigh or measure in cups. The converter above and the chart below cover both directions for any amount.
How many cups is 1 ounce of H2O?
H2O is another name for water, so 1 ounce of H2O is 0.11 cups, exactly the same as water. The figure does not change with the name: 2 ounces is 0.23 cups and 0.5 ounces is 0.06 cups. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.
Are water and H2O the same thing?
Yes. H2O is another name for water, so they are the same ingredient and convert identically. 1 ounce of water is 0.11 cups under either name, and 2 ounces is 0.23 cups. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.
How many cups is 1/2 ounce of water?
1/2 ounce of water is 0.06 cups. The ratio is fixed, so 1 ounce of water is 0.11 cups and 2 ounces is 0.23 cups. Half measures come up often when scaling a recipe down, and the figure divides cleanly. Use the converter above for any other amount, or the chart below for the common ones.
How many cups is 1/4 ounce of water?
1/4 ounce (0.25 ounce) of water is 0.03 cups. The ratio is fixed, so 1 ounce of water is 0.11 cups and 2 ounces is 0.23 cups. Quarter amounts often come up when scaling a recipe down step by step, and the figure divides cleanly. Use the converter above for any other quantity, or the chart below for the most common amounts.

Other Ingredients

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