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Cooking conversion
Grams of Rolled Oats to Milliliters
How many milliliters of rolled oats are in a given weight? Type a number of grams below to see the volume. Math uses rolled oats's density of 0.385 g/mL.
Calculator
100 g of rolled oats = 259.74 mL
Grams of Rolled Oats to Milliliters Conversion Table
Common values for rolled oats:
| Grams of rolled oats | Milliliters |
|---|---|
| 10 g | 25.974 mL |
| 25 g | 64.9351 mL |
| 50 g | 129.87 mL |
| 100 g | 259.74 mL |
| 150 g | 389.61 mL |
| 200 g | 519.48 mL |
| 250 g | 649.35 mL |
| 500 g | 1298.7 mL |
| 1000 g | 2597.4 mL |
How this works
Rolled oats has a density of about 0.385 g/mL (king arthur baking: 1 cup = 91g). That means 1 mL of rolled oats weighs 0.385 grams.
Milliliters = grams × 2.5974
Note: Old-fashioned rolled oats. Quick oats are slightly denser (~0.41).
Why a cup of rolled oats doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of rolled oats 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 (0.385 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 King Arthur Baking: 1 cup = 91g. Old-fashioned rolled oats. Quick oats are slightly denser (~0.41).
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 rolled oats by its density (0.385 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.