Milliliters to Grams Converter
Grams = milliliters × density. For water the two numbers are almost the same; for other ingredients pick one from the list or enter its density.
Sources: USGS, King Arthur Baking, NIST Handbook 44 Updated
Result
250 mL = 250 g
at a density of 1 g/mL (Water, rounded (1 g/mL))
The formula
grams = milliliters × density (g/mL)
A milliliter is a volume and a gram is a weight. Density is the link: it says how many grams one milliliter of the substance weighs. Water sits very close to 1 g/mL, which is why “1 mL = 1 g” works for water and fails for almost everything else.
Worked example: 250 mL
- Water, rounded to 1 g/mL: 250 × 1 = 250 g. With the measured density at 21 °C, 250 × 0.99802 = 249.5 g.
- Honey, about 1.42 g/mL: 250 × 1.42 = 355 g.
- All-purpose flour, about 0.507 g/mL: 250 × 0.507 = 127 g.
Densities used on this page
Worked out from sourced weights. The last column is the line the figure comes from.
| Ingredient | g per mL | Worked out from |
|---|---|---|
| All-purpose flour | 0.507 | 1 cup = 120 g (King Arthur Baking) |
| Bread flour | 0.507 | 1 cup = 120 g (King Arthur Baking) |
| Whole wheat flour | 0.478 | 1 cup = 113 g (King Arthur Baking) |
| Cake flour (unbleached) | 0.507 | 1 cup = 120 g (King Arthur Baking) |
| Pastry flour | 0.448 | 1 cup = 106 g (King Arthur Baking) |
| Self-rising flour | 0.478 | 1 cup = 113 g (King Arthur Baking) |
| Rye flour (medium) | 0.448 | 1 cup = 106 g (King Arthur Baking) |
| Almond flour | 0.406 | 1 cup = 96 g (King Arthur Baking) |
| Semolina flour | 0.689 | 1 cup = 163 g (King Arthur Baking) |
| Cornmeal (whole) | 0.583 | 1 cup = 138 g (King Arthur Baking) |
| Cornstarch | 0.473 | 1/4 cup = 28 g (King Arthur Baking) |
| Granulated sugar | 0.837 | 1 cup = 198 g (King Arthur Baking) |
| Brown sugar (packed) | 0.900 | 1 cup = 213 g (King Arthur Baking) |
| Powdered sugar (unsifted) | 0.478 | 1 cup = 113 g (King Arthur Baking) |
| Honey | 1.420 | 1 tablespoon = 21 g (King Arthur Baking) |
| Maple syrup | 1.319 | 1/2 cup = 156 g (King Arthur Baking) |
| Molasses | 1.437 | 1/4 cup = 85 g (King Arthur Baking) |
| Corn syrup | 1.319 | 1 cup = 312 g (King Arthur Baking) |
| Butter | 0.955 | 1/2 cup = 113 g (King Arthur Baking) |
| Vegetable oil | 0.837 | 1 cup = 198 g (King Arthur Baking) |
| Olive oil | 0.845 | 1/4 cup = 50 g (King Arthur Baking) |
| Coconut oil | 0.955 | 1/2 cup = 113 g (King Arthur Baking) |
| Vegetable shortening | 0.778 | 1/4 cup = 46 g (King Arthur Baking) |
| Peanut butter | 1.141 | 1/2 cup = 135 g (King Arthur Baking) |
| Rice (long grain, dry) | 0.837 | 1/2 cup = 99 g (King Arthur Baking) |
| Oats (old-fashioned or quick-cooking) | 0.376 | 1 cup = 89 g (King Arthur Baking) |
| Cocoa powder (unsweetened) | 0.355 | 1/2 cup = 42 g (King Arthur Baking) |
| Chocolate chips | 0.719 | 1 cup = 170 g (King Arthur Baking) |
| Raisins (loose) | 0.630 | 1 cup = 149 g (King Arthur Baking) |
| Walnuts (chopped) | 0.478 | 1 cup = 113 g (King Arthur Baking) |
| Breadcrumbs (dried) | 0.473 | 1/4 cup = 28 g (King Arthur Baking) |
| Table salt | 1.217 | 1 tablespoon = 18 g (King Arthur Baking) |
| Kosher salt (Diamond Crystal) | 0.541 | 1 tablespoon = 8 g (King Arthur Baking) |
| Kosher salt (Morton) | 1.082 | 1 tablespoon = 16 g (King Arthur Baking) |
| Baking powder | 0.812 | 1 teaspoon = 4 g (King Arthur Baking) |
| Baking soda | 1.217 | 1/2 teaspoon = 3 g (King Arthur Baking) |
| Instant yeast | 0.609 | 1 tablespoon = 9 g (King Arthur Baking) |
| Water | 0.998 | 1 milliliter = 0.99802 g (USGS) |
Loose ingredients such as flour do not have one fixed density: how tightly the measure is filled changes the weight. Treat these as good starting figures and weigh when it matters.
Frequently asked questions
How many grams is 1 mL?
For water, about 1 gram (0.998 g at room temperature). For anything else it is the density in g/mL: a milliliter of honey is about 1.42 g and a milliliter of all-purpose flour about 0.51 g, going by the weights in the table below.
Is 100 mL the same as 100 grams?
Only for water, near enough. 100 mL of water weighs about 99.8 g. 100 mL of flour weighs about 51 g and 100 mL of honey about 142 g.
How do I convert grams to mL?
Divide the grams by the density. Type the grams into the right-hand field and the milliliters update.
Where do the ingredient densities come from?
Each one is worked out from a weight listed in the King Arthur Baking ingredient weight chart, divided by the volume of the US cup, tablespoon or teaspoon it was listed for. The table shows the original line. They are practical kitchen figures for a filled measuring cup, not laboratory densities.
Why is milk not in the list?
The chart we use rounds milk and other thin liquids to 8 ounces per cup, which is about 4% light for water. Until we can cite a checked density for them we leave them out. If you know the density of your liquid, type it into the density field.
Sources
- U.S. Geological Survey, Water Science School: Water Density — water is 0.99802 g/cm³ at 70 °F (21 °C) (checked October 12, 2026)
- King Arthur Baking: Ingredient Weight Chart — ingredient weights per cup, tablespoon or teaspoon, from which the densities below are worked out (checked October 12, 2026)
- NIST Handbook 44 (2026), Appendix C — US cup, tablespoon and teaspoon in milliliters (checked October 12, 2026)