Water Cups to Ounces
Convert any amount of water between cups and ounces. 1 cup of water equals 8.35 oz. Use the calculator for custom amounts, or choose an amount below.
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Common water measurements found in recipes.
Other Units for Water
Convert water from cups to other units. Each link has its own calculator and conversion amounts.
Similar Ingredients
Measuring Tip
Liquid densities vary: oils weigh less per cup than water, while syrups and honey weigh more. This is why ingredient-specific conversions matter even for liquids.
Understanding the Units
What is a Cup?
A cup is a US customary unit of volume equal to 236.588 milliliters or 8 fluid ounces. It is the most common volume measurement in American recipes. One cup can be divided into 16 tablespoons or 48 teaspoons.
What is an Ounce?
Ounces are commonly used in US recipes for cheese, meat, chocolate, and other ingredients sold by weight. Many kitchen scales offer both gram and ounce readings.
Frequently Asked Questions
1 cup of water is 8.35 oz. The conversion depends on the density of water and scales proportionally for any amount.
The most accurate way is to weigh water on a kitchen scale. If you are measuring by volume, use a liquid measuring cup on a flat surface and read the level at eye height. Liquids settle naturally, so volume measurements are already quite consistent.
Very close. Pure liquid densities are consistent across brands, so the cups to ounces conversion for water typically varies by less than 2-3%.
For liquids like water, volume measurements are already quite accurate since liquids settle to a consistent level. A kitchen scale adds precision but the difference is typically small for liquid ingredients.