🧪 Grams to ML Converter by Ingredient Density
By Shihab Mia · Updated 2026-07-29
100 g of water is 100 ml
Using a density of 1 gram per ml.
Results use typical kitchen-average densities. Only water converts exactly 1 gram per 1 ml; every other ingredient is an approximation, so weigh on a scale for precise recipes.
This grams to ml converter turns a weight in grams into milliliters (and back) using the real density of the ingredient you select, so the result is accurate for water, milk, honey, oil or flour instead of a single generic 1:1 guess. For example, 100 grams of water is exactly 100 ml, but 100 grams of honey is only about 70.4 ml because honey packs much more mass into the same space. Choose an ingredient, type a value, and the converted amount updates instantly in either direction.
What is the Grams to ML Converter?
Grams measure mass, the amount of matter in something, while milliliters measure volume, the amount of space something takes up. The two units only line up when a substance has a density of exactly 1 gram per milliliter, which is the defining property of water. For everything else, you need the density, expressed in grams per ml, to bridge the gap. Once you have that number the math is simple division or multiplication: to convert grams to ml, divide the weight by the density; to convert ml to grams, multiply the volume by the density. For instance, 200 grams of honey at a density of 1.42 g/ml works out to 200 divided by 1.42, which is about 140.8 ml.
A common source of confusion is that many home cooks treat "grams" and "ml" as interchangeable, especially for liquids, because water behaves that way. Pure water is close enough to 1.00 g/ml at kitchen temperatures that the shortcut works fine for water-based measurements. But swap in milk (about 1.03 g/ml because of dissolved solids and fat), honey or maple syrup (well over 1.3 g/ml thanks to dissolved sugar), or vegetable oil (under 1.00 g/ml because fats are lighter than water), and assuming a 1:1 ratio introduces a real, sometimes significant error. Flour is the extreme case in the other direction: because it is a dry powder full of trapped air, its bulk density is roughly 0.53 g/ml, so 100 grams of flour actually occupies close to 190 ml of space, nearly double what the same weight of water would take up.
This kind of conversion shows up constantly outside the kitchen too. Recipe writers converting between US customary measurements and metric ones need to translate a gram figure on a nutrition label into a volume for a measuring cup or syringe. Home bartenders and baristas scaling syrups, parents measuring liquid medication doses that are labeled in ml but discussed by weight, and hobbyists mixing skincare, candle wax, or cleaning solutions from a formula written in percentages by weight all lean on the same grams-to-ml relationship. In every one of these cases, using the correct density for the actual substance, rather than assuming water-like behavior, is what keeps the result usable.
It is worth being honest about the limits of any density-based conversion like this one. The values used here are typical, well-documented kitchen averages, similar to the density figures published by reference sources such as the Engineering ToolBox and USDA food composition data, but real ingredients vary with temperature, brand, moisture content, and how they were processed. Warm honey is thinner and slightly less dense than cold honey; whole milk and skim milk differ slightly; a coarser or finer batch of granulated sugar packs marginally differently. For everyday cooking, dosing, and DIY projects, this converter gets you within a fraction of a percent of the true answer for water and is a very close, genuinely useful estimate for everything else. If a project demands laboratory precision, weigh the specific batch you are using and calculate its density directly rather than relying on any published average, including this one.
When to use it
- Converting a European or metric recipe written in grams into milliliters when your measuring tools show volume, or the reverse.
- Checking how many milliliters a liquid medication or supplement dose is when the label lists milligrams or grams of active ingredient dissolved in a liquid.
- Scaling a homemade syrup, marinade, or cocktail recipe that mixes a weight-based formula with volume-based tools like a jigger or syringe.
- Working out how much space a weighed ingredient, like flour or sugar, will take up in a measuring jug or mixing bowl before you start.
How to use the Grams to ML Converter
- Choose the substance you are converting from the ingredient dropdown, since density is different for every liquid or powder.
- Select the direction you need, grams to ml or ml to grams.
- Type the amount into the input box that appears for that direction.
- Read the converted result immediately, along with the density figure used, and copy it with the copy button if needed.
Formula & method
Worked examples
A recipe lists 200 grams of honey, but your measuring tools only show milliliters.
- Honey has a density of about 1.42 grams per ml.
- Set the direction to grams to ml.
- Divide the weight by the density: 200 / 1.42 = 140.85 ml.
- Measure just under 141 ml of honey.
Result: 200 grams of honey is about 140.8 ml.
You measured 250 ml of vegetable oil and need to know the weight for a nutrition calculation.
- Vegetable oil has a density of about 0.92 grams per ml.
- Set the direction to ml to grams.
- Multiply the volume by the density: 250 * 0.92 = 230 grams.
- Use 230 grams as the weight of that 250 ml of oil.
Result: 250 ml of vegetable oil weighs about 230 grams.
Grams to ml for common substances (by density)
| Substance | Density (g/ml) | 100 g in ml | 250 g in ml | 500 g in ml |
|---|---|---|---|---|
| Water | 1.00 | 100.0 ml | 250.0 ml | 500.0 ml |
| Milk | 1.03 | 97.1 ml | 242.7 ml | 485.4 ml |
| Heavy cream | 1.01 | 99.0 ml | 247.5 ml | 495.0 ml |
| Vegetable oil | 0.92 | 108.7 ml | 271.7 ml | 543.5 ml |
| Granulated sugar | 0.85 | 117.6 ml | 294.1 ml | 588.2 ml |
| All-purpose flour | 0.53 | 188.7 ml | 471.7 ml | 943.4 ml |
| Honey | 1.42 | 70.4 ml | 176.1 ml | 352.1 ml |
| Maple syrup | 1.37 | 73.0 ml | 182.5 ml | 365.0 ml |
| Rubbing alcohol | 0.79 | 126.6 ml | 316.5 ml | 632.9 ml |
How many grams is 100 ml, by substance
| Substance | Density (g/ml) | 100 ml in grams |
|---|---|---|
| Water | 1.00 | 100 g |
| Milk | 1.03 | 103 g |
| Heavy cream | 1.01 | 101 g |
| Vegetable oil | 0.92 | 92 g |
| Granulated sugar | 0.85 | 85 g |
| All-purpose flour | 0.53 | 53 g |
| Honey | 1.42 | 142 g |
| Maple syrup | 1.37 | 137 g |
| Rubbing alcohol | 0.79 | 79 g |
Common mistakes to avoid
- Assuming grams and ml are always equal. That 1:1 relationship only holds for water. Honey, syrup and cream are denser than water, so a given weight takes up less volume. Oil, flour and alcohol are less dense, so the same weight takes up more volume. Always use the density of the actual substance.
- Using a dry ingredient density like a liquid one. Flour and sugar are powders whose "density" includes a lot of trapped air, and it changes depending on how packed the substance is. Treat those figures as useful averages for kitchen and DIY use, not exact physical constants like the density of pure water.
- Ignoring temperature effects on liquids. Warm honey, syrup or oil is slightly less dense than the same substance cold, since liquids expand a little as they warm. The difference is small for everyday cooking but can matter for precise dosing or lab-style formulations.
- Forgetting that density is not the same as concentration. A solution's density depends on what is dissolved in it. Salt water, sugar syrup, and plain water all have different densities even though they look similar, so do not reuse the water density for a solution just because it looks like water.
Glossary
- Gram (g)
- A metric unit of mass. One thousand grams make a kilogram. Mass does not change with temperature or how a substance is packed.
- Milliliter (ml)
- A metric unit of volume, equal to one thousandth of a liter. It measures the space a substance occupies, not its weight.
- Density
- The mass of a substance per unit of volume, expressed here in grams per milliliter. It is the number that links a weight to a volume for any given substance.
- Specific gravity
- The ratio of a substance's density to the density of water. A specific gravity above 1 means the substance is denser than water; below 1 means it is lighter.
- Bulk density
- The density of a loose powder or granular material, like flour or sugar, including the air trapped between particles. It is lower than the density of the solid material itself.
- Volume to mass conversion
- Translating a measure of space, like milliliters, into a measure of mass, like grams, using the density of the specific substance involved.
Frequently asked questions
Is 1 gram equal to 1 ml?
Only for water, and only approximately. Pure water is very close to 1.00 gram per ml at normal kitchen temperatures, so 1 gram of water is about 1 ml. For any other substance, milk, oil, honey, flour or alcohol, the density is different, so 1 gram is not 1 ml. Select the correct substance above to get an accurate figure.
How do I convert grams to ml?
Divide the weight in grams by the density of the substance in grams per ml. For example, 100 grams of vegetable oil at a density of 0.92 g/ml equals 100 divided by 0.92, which is about 108.7 ml. This converter does that calculation automatically once you pick the ingredient.
How many ml is 100 grams of water?
100 grams of water is 100 ml, since water has a density of almost exactly 1.00 gram per ml at typical room and kitchen temperatures.
How many ml is 100 grams of honey?
100 grams of honey is about 70.4 ml, because honey is denser than water at roughly 1.42 grams per ml, so the same weight takes up less space.
Why is 100 grams of flour more than 100 ml?
Flour is a light, airy powder with a density of about 0.53 grams per ml, well under water's 1.00 g/ml. That means 100 grams of flour actually fills close to 190 ml of space, almost double the volume of 100 grams of water.
Can I use the same grams to ml conversion for any liquid?
No. Each liquid has its own density based on what it is made of and what is dissolved in it. Milk, cream, oil, honey, syrup and alcohol all convert differently, which is why this tool asks you to choose the specific substance before converting.