Water Ounces to Milliliters
Convert any amount of water between ounces and milliliters. 1 ounce of water equals 28.35 ml. 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 ounces 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 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.
What is a Milliliter?
A milliliter (ml) is a metric unit of volume equal to 1/1000 of a liter. It is the standard volume measurement for cooking in most countries outside the US. One cup equals approximately 236.588 milliliters.
Frequently Asked Questions
1 ounce of water is 28.35 ml. The conversion depends on the density of water and scales proportionally for any amount.
If you have a kitchen scale, weighing water gives you an exact starting point for this conversion. If you need to measure by volume instead, use a liquid measuring cup on a flat surface and read the level at eye height.
Very close. Pure liquid densities are consistent across brands, so the ounces to milliliters conversion for water typically varies by less than 2-3%.
The same weight of different ingredients fills different volumes because each ingredient has a different density. An ounce of water fills a different number of milliliters than an ounce of a lighter or heavier ingredient. That is why this converter needs to know which ingredient you are measuring.