Water Fluid Ounces to Grams
Convert any amount of water between fluid ounces and grams. 1 fluid ounce of water equals 29.57 g. Use the calculator for custom amounts, or choose an amount below.
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Common water measurements found in recipes.
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Measuring Tip
For liquids, place your measuring cup on a flat surface and read at eye level. The bottom of the meniscus (the curve at the surface) should align with the measurement line.
Understanding the Units
What is a Fluid Ounce?
There are 8 fluid ounces in a US cup and 128 fluid ounces in a US gallon. The UK fluid ounce is slightly smaller (28.413 ml vs 29.574 ml), so UK and US recipes using fluid ounces will differ slightly.
What is a Gram?
A gram (g) is a metric unit of mass equal to 1/1000 of a kilogram. It is the standard weight measurement for precise baking worldwide. Professional bakers prefer grams because they are more accurate than volume measurements.
Frequently Asked Questions
1 fluid ounce of water equals 29.57 g. The result scales proportionally for other amounts - choose an amount below or enter any quantity in the calculator.
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 fluid ounces to grams 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.