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About milk measurements
Milk's density is about 1.04 g/ml (FAO density database), so a US cup weighs roughly 245 g. Counterintuitively, skim milk is slightly denser than whole milk, because milkfat is lighter than water — the more cream that is removed, the heavier the same volume becomes.

Ounces of milk equivalent in ml?
FAQs on milk weight to volume conversion
Is 3/4 ounces of milk 21 ml?
Yes — 3/4 ounces of milk equals 21 ml, based on a density of 1040 g/ml.
3/4 ounces of milk equals how many ml?
3/4 ounces of milk is equivalent 21 ml.
How much is 21 ml of milk in ounces?
21 ml of milk equals 3/4 ( ~ 3/4) ounces.
Ounces to Ml of Milk Conversion Chart
Note: Fractions are rounded to common recipe fractions (1/8, 1/4, 1/3, 1/2, 2/3, 3/4…). Values are rounded to 3 significant figures.
| Ounces to ml of Milk | |
|---|---|
| 1.71 ml | |
| 3.42 ml | |
| 6.84 ml | |
| 9.12 ml | |
| 13.7 ml | |
| 18.2 ml | |
| 20.5 ml | |
| 1 ounce | 27.4 ml |
| 1 | 29.1 ml |
| 1 | 30.8 ml |
| 1 | 34.2 ml |
| 1 | 36.5 ml |
| 1 | 41 ml |
| 1 | 45.6 ml |
| 1 | 47.9 ml |
| 2 ounces | 54.7 ml |
| 2 | 56.4 ml |
| 2 | 58.1 ml |
| 2 | 61.6 ml |
| 2 | 63.9 ml |
| 2 | 68.4 ml |
| 3 ounces | 82.1 ml |
| 4 ounces | 109 ml |
| 5 ounces | 137 ml |
| 6 ounces | 164 ml |
| 8 ounces | 219 ml |
| 10 ounces | 274 ml |
References:
Weight to Volume Conversions - Recipes
A note on cooking ingredients measurements
Notes: results are rounded (by default) to 3 significant figures. Cooking conversions use standard ingredient densities — the exact weight varies slightly with the brand and how tightly the ingredient is packed ☺.