ml to Grams Converter
Enter a volume in milliliters and pick an ingredient (or your own density) to get the weight in grams, with the formula and the density's source shown.
Densities are typical values from USDA data -- real products vary by brand and how they're packed.
Weight
358.22 g
at 1.4329 g/mL
Formula
grams = mL × density (g/mL)
Why you need a density, not just a conversion
Milliliters measure volume; grams measure mass. The two are only interchangeable one-to-one for a substance with a density of exactly 1.0000 g/mL -- water, close to its temperature of maximum density. At room temperature, water itself is about 0.9970 g/mL, not exactly 1 (see Jones & Harris, "ITS-90 Density of Water Formulation for Volumetric Standards Calibration," NIST J. Res. 97, 335 (1992), Table 1). Anything else -- honey, flour, oil, milk -- has its own density, and this calculator multiplies your volume by that density to get a weight:
grams = milliliters × density (g/mL)
Worked example
The calculator's own defaults: 250.00 mL of honey, at a density of 1.4329 g/mL (derived from USDA FoodData Central ID 169640, "Honey": 1 cup = 339 g).
| Volume | 250.00 mL |
| Density | 1.4329 g/mL |
| Weight | 358.22 g |
Plug the same numbers into the calculator above and it lands on the same result; that reconciliation is checked in the site's own test suite, not just written here. See every density and its source on the Ingredient Density Table.
Frequently Asked Questions
Is 1 mL always equal to 1 gram?
Only for a substance with a density of exactly 1.000 g/mL -- water, roughly, at its temperature of maximum density (Jones & Harris, "ITS-90 Density of Water Formulation for Volumetric Standards Calibration," NIST J. Res. 97, 335 (1992), Table 1). Anything denser than water weighs more than 1 g per mL (honey is about 1.43 g/mL); anything less dense weighs less (vegetable oil is about 0.92 g/mL). There's no universal ml-to-grams conversion without a density.
Why does this calculator ask for a density instead of just converting?
Because milliliters measure volume and grams measure mass -- converting between them requires knowing how much a given volume of that specific substance weighs, i.e. its density. A generic "ml to grams" converter that skips this is either assuming water or silently wrong for anything else.
Where do the ingredient densities come from?
Each one is derived from a USDA FoodData Central household weight (grams per cup) divided by the exact US cup volume in milliliters, with the FoodData Central ID and source measure cited on the Ingredient Density Table page -- not typed from memory.
Can I use a custom density?
Yes -- pick "Custom density" from the dropdown and enter any value in g/mL. That's the right move for an ingredient not in the table, or when you know the actual density of your specific product (check the packaging or a lab data sheet).
How accurate is this for baking?
Reasonably close for a typical example of that ingredient, but real products vary by brand, moisture content and how they're packed into the cup -- packed brown sugar and sifted flour, for instance, can differ noticeably from the USDA reference measure. For baking precision, weigh the actual ingredient on a kitchen scale rather than relying on any density conversion.
These are conversions, not measurements -- a density or concentration you enter or pick determines the answer, and real ingredients and products vary by brand. Nothing here is medical, dosing or pharmacist advice; confirm any medicine amount against the actual product label and your pharmacist or prescriber. See the Terms.