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How Much Is 1 Ounce of Water in Milliliters?

Q: How many milliliters is 1 ounce of water?

1 ounce of water converts to approximately 28.35 ml.

Q: What is the formula for converting ounces of water to milliliters?

Convert ounces to grams first (1 ounce = 28.3495g), then divide by 236.59 (grams per cup for water) to get cups, then multiply by 236.588 to convert cups to milliliters.

Converting 1 ounce of water to milliliters gives 28.35 ml. First convert to grams (1 oz = 28.35g), then divide by the density of water (236.59g per cup). Each ingredient fills a different volume at the same weight.

1 ounce of water

28.35ml

Try: 2 ounces = 56.70 ml 3 ounces = 85.05 ml 4 ounces = 113.40 ml 5 ounces = 141.75 ml

Compare: 1 ounce buttermilk = 27.38 ml 1 ounce coconut milk = 29.68 ml 1 ounce coconut oil = 30.77 ml

Convert a different ingredient

1 ounce of water is also

0.12 cup (cups) 1.92 tbsp (tablespoons) 0.96 fl oz (fluid ounces)

Ounces of Water

Milliliters

28.35

Formula and Step-by-Step

(ounces × 28.35g/oz) ÷ 236.59g/cup × 236.588 = milliliters

Start with 1 ounce of water
Convert ounces to grams: 1 × 28.35 = 28.35g
1 cup of water = 236.59g
28.35g ÷ 236.59g/cup = 0.12 cups × 236.588 = 28.35 milliliters

The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.

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.

Water at Different Amounts

How water scales across common ounces measurements. Your amount (1 ounce) is highlighted.

Other Amounts of Water

Ounces	Milliliters
1 ounce	28.35 ml
2 ounces	56.70 ml
3 ounces	85.05 ml
4 ounces	113.40 ml
5 ounces	141.75 ml
6 ounces	170.10 ml
8 ounces	226.79 ml
10 ounces	283.49 ml
12 ounces	340.19 ml
16 ounces	453.59 ml

Understanding the Units

What is an Ounce?

An ounce (oz) is a US customary unit of weight equal to 28.3495 grams or 1/16 of a pound. In cooking, "ounces" refers to weight (avoirdupois ounces), not fluid ounces which measure volume.

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

How many milliliters is 1 ounce of water? expand_more

About 28.35 ml, based on water having a density of 236.59g per cup. The exact amount depends on how the ingredient is measured and the specific product.

What is the formula for converting ounces of water to milliliters? expand_more

First convert ounces to grams (1 ounce = 28.3495g), then divide by 236.59 (grams per cup), then multiply by 236.588 to get milliliters. For 1 ounce: 1 × 28.3495 = 28.35g, then 28.35 ÷ 236.59 = 0.12 cups × 236.588 = 28.35 ml.

How do I measure water accurately? expand_more

For the most accurate results, weigh water on a kitchen scale. If measuring by volume, use a liquid measuring cup on a flat surface and read the level at eye height.

Can I use the same conversion for water at different temperatures? expand_more

Temperature has a minimal effect on most cooking liquids. The density of water changes slightly with temperature, but the difference is usually less than 1-2% between refrigerator and room temperature. This conversion assumes room temperature.

How do I convert milliliters of water back to ounces? expand_more

Reverse the conversion: 28.35 ml ÷ 236.588 = 0.119826 cups, then 0.119826 × 236.59g/cup = 28.35g, then 28.35g ÷ 28.3495 = 1 ounce. Or use the Milliliters to Ounces converter.