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Cooking conversion
Ounces of Water to Milliliters
How many milliliters of water are in a given weight? Type a number of ounces below to see the volume. Math uses water's density of 1.000 g/mL.
Calculator
100 oz of water = 2834.95 mL
Ounces of Water to Milliliters Conversion Table
Common values for water:
| Ounces of water | Milliliters |
|---|---|
| 10 oz | 283.5 mL |
| 25 oz | 708.74 mL |
| 50 oz | 1417.48 mL |
| 100 oz | 2834.95 mL |
| 150 oz | 4252.43 mL |
| 200 oz | 5669.9 mL |
| 250 oz | 7087.38 mL |
| 500 oz | 14174.76 mL |
| 1000 oz | 28349.52 mL |
How this works
Water has a density of about 1.000 g/mL (si definition). That means 1 mL of water weighs 1.000 grams.
Milliliters = ounces × 28.3495
Note: By definition at 4°C. Within 0.5% across cooking temperatures.
Why a cup of water doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of water can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here (1.000 g/mL) matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.
Sourced from SI definition. By definition at 4°C. Within 0.5% across cooking temperatures.
Volume vs weight in cooking
The American convention of measuring ingredients by volume (cups, tablespoons, teaspoons) is convenient but introduces variability that doesn't exist in weight-based recipes. Most professional bakers and bakeries weigh ingredients to within a gram because the structure of baked goods depends on precise ingredient ratios. For everyday cooking — soups, sauces, sautés — the volume-to-weight imprecision rarely matters. For baking that depends on rising or texture (cakes, breads, laminated doughs), it matters a lot.
The conversion
Multiplying the volume of water by its density (1.000 g/mL) gives the weight in grams. The calculator at the top of this page does the math automatically; the formula box above shows the resulting linear factor for the specific volume and weight units selected here.