Millilitres of whole milk to grams runs on one number, 1.0313277 grams per millilitre. It is a measured property of this ingredient rather than a defined conversion, which is why a generic volume-to-weight tool cannot give you it.
Water is the yardstick: 1 mL of it weighs 1 g. Whole milk comes in at 1.0313 g per mL, or 103.1% of water, which is why a cup of it is 244 g rather than 236.6 g. Volume and weight only line up for water, and only in metric.
Whole milk has a density of 1.0313 g per mL, so 100 mL of it weighs 103.1 g and 250 mL weighs 257.8 g. That single figure is what every other number on this page is built from — water is 1.00 g per mL, so this ingredient is 103.1% as heavy as the same volume of water.
Grams are the unit this conversion is really for. A domestic scale resolves to a gram, which is 0.41% of a cup of whole milk, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 2.049 cups, and a 1 kg pack 4.098.
What the number depends on: About 87% water, with dissolved sugars and protein making up the rest — which is what puts it just above water in density.
The formula
millilitres- The amount of whole milk you are converting, in millilitres
1.03132769241- Grams per millilitre for whole milk, from its density of 1.0313 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in millilitres.
- It is multiplied by 1.03132769241, the grams-per-millilitre figure for whole milk.
- The result appears in grams, with a second reading in oz beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
15 mL of whole milk in grams
Take 15 mL of whole milk: 15 × 1.0313277 gives 15.4699 grams. Doubling the batch takes it to 30.9398 grams, because the relationship is a straight proportion once the density is known.
100 mL of whole milk in grams
A recipe calling for 100 mL of whole milk needs 103.133 grams on the scale. The arithmetic is 100 × 1.0313277 = 103.13277, and halving the recipe halves the weight to 51.5664 grams.
250 mL of whole milk in grams
Take 250 mL of whole milk: 250 × 1.0313277 gives 257.832 grams. Doubling the batch takes it to 515.664 grams, because the relationship is a straight proportion once the density is known.
How to read your score
Frequently asked questions
How many grams are in 1 mL of whole milk?
One millilitre of whole milk is 1.0313277 grams. Half that quantity is 0.515664 grams and double it is 2.06266 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of whole milk not 236 g like water?
Because weight per cup depends on what is in the cup. Whole milk has a density of 1.0313 g per mL where water has 1.00, so a cup of it weighs 244 g rather than 236.6 g. That is a difference of 7.4 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Barely. Whole milk does not compress, so a cup of it is 244 g however it is poured — within about 1%, which is inside the accuracy of a domestic scale. This is the group where measuring by volume is defensible.
Is a fluid ounce of whole milk the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of whole milk weighs 1.076 oz, so the two readings differ by 7.59%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of whole milk would weigh 257.83 g instead of 244 g — 13.8 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
At this size the spoon wins. One millilitre of whole milk is 1.031 g, and a scale reading to the nearest gram is working at 97% resolution on that — a measuring spoon is the more accurate instrument below about 5 g, which is why spice quantities are still written in spoons.
How many millilitres of whole milk is 500 g?
500 g of whole milk is 484.81 millilitres — 0.969624 millilitres to one gram, so 500 × 0.969624 = 484.81. Going that way is a division by 1.03133, or a multiplication by 0.969624 if you prefer.
Whole milk in millilitres and grams
| Millilitres | Grams | Unrounded |
|---|---|---|
| 5 mL | 5.15664 g | 5.156638462 |
| 10 mL | 10.3133 g | 10.31327692 |
| 15 mL | 15.4699 g | 15.46991539 |
| 30 mL | 30.9398 g | 30.93983077 |
| 50 mL | 51.5664 g | 51.56638462 |
| 100 mL | 103.133 g | 103.1327692 |
| 125 mL | 128.916 g | 128.9159616 |
| 150 mL | 154.699 g | 154.6991539 |
| 200 mL | 206.266 g | 206.2655385 |
| 250 mL | 257.832 g | 257.8319231 |
| 500 mL | 515.664 g | 515.6638462 |
Based on 244 g per cup of whole milk. One millilitre of whole milk is 1.0313277 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 244 g | 8.61 oz | 236.6 mL |
| 3/4 cup | 183 g | 6.46 oz | 177.4 mL |
| 2/3 cup | 162.7 g | 5.74 oz | 157.7 mL |
| 1/2 cup | 122 g | 4.3 oz | 118.3 mL |
| 1/3 cup | 81.33 g | 2.87 oz | 78.86 mL |
| 1/4 cup | 61 g | 2.15 oz | 59.15 mL |
| 1 tbsp | 15.25 g | 0.538 oz | 14.79 mL |
| 1 tsp | 5.083 g | 0.179 oz | 4.929 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Tahini | 240 g | 8.466 oz | 1.014 |
| Half-and-half | 242 g | 8.536 oz | 1.023 |
| Egg whites | 243 g | 8.572 oz | 1.027 |
| Whole milk (this page) | 244 g | 8.607 oz | 1.031 |
| Skim milk | 245 g | 8.642 oz | 1.036 |
| Buttermilk | 245 g | 8.642 oz | 1.036 |
| Plain yogurt | 245 g | 8.642 oz | 1.036 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.