Milk grams to cups
To convert grams to cups, divide the grams by 245. For example, 100 g of milk ≈ 0.41 cup.
Instant baking converter
Convert by ingredient, cup size and unit. Works with decimals and fractions like 1 1/2 or ¾.
Milk is a liquid, so a US cup of it weighs 245 grams whether it's whole, 2%, or skim. The fat content barely moves the scale because milk is mostly water. Here you'll convert grams to cups without second-guessing the math.
Milk grams to cups chart (US cup)
| Grams | Cups (approx.) | Decimal cups |
|---|---|---|
| 25 g | ⅛ cup | 0.1 |
| 50 g | 0.2 cup | 0.2 |
| 75 g | ⅓ cup | 0.31 |
| 100 g | 0.41 cup | 0.41 |
| 125 g | ½ cup | 0.51 |
| 150 g | 0.61 cup | 0.61 |
| 175 g | 0.71 cup | 0.71 |
| 200 g | 0.82 cup | 0.82 |
| 250 g | 1 cup | 1.02 |
| 300 g | 1¼ cups | 1.22 |
| 400 g | 1⅔ cups | 1.63 |
| 500 g | 2 cups | 2.04 |
Why milk weighs what it does
Milk is roughly 87% water, so its density sits just above water's at about 1.03 g/mL, giving 245 g per US cup. Butterfat is lighter than water, but at 3.25% in whole milk it shaves off almost nothing measurable. Skim actually weighs a hair more than whole because removing fat raises the proportion of denser solids and water. Temperature matters slightly: cold milk straight from the fridge is marginally denser than room-temperature milk, but the difference is well under a gram per cup and irrelevant for baking.
How to measure milk
Pour milk into a clear liquid measuring cup set on a flat surface, then crouch to read the meniscus at eye level. Dry cups overfill liquids because you can't level them. Better still, weigh it: zero your scale with the bowl on it and pour to 245 g per cup.
Common mistake
Treating "1 cup" as 240 mL and assuming that equals 240 grams. A US cup is 237 mL, and milk is denser than water, so it lands at 245 g. People also scoop milk with a dry measuring cup and read it from above, overshooting by a tablespoon or more.
Other cup sizes
| Cup type | 1 cup of milk |
|---|---|
| US cup (240 ml) | 245 g |
| Metric cup (250 ml) | 255 g |
| Australian / South African cup (250 ml) | 255 g |
| Imperial cup (284 ml) | 290 g |
Where it matters
Milk hydrates batters and doughs, activates baking soda, and builds custards, pancakes, scones, bechamel, and bread. Getting the amount right matters most in tight ratios like crepes, popovers, and choux, where a splash too much thins the batter and ruins the rise or set. Cakes are more forgiving.
FAQ
Does 1 cup of milk weigh 240 or 245 grams?
A US cup of milk weighs 245 grams. The 240 figure comes from rounding the volume (237 mL) and ignoring that milk is denser than water. Use 245 g for accuracy.
Is the weight different for whole, 2%, and skim milk?
Barely. All land within a gram or two of 245 g per cup. Skim is fractionally heavier than whole because removing butterfat leaves a slightly denser liquid, but it's negligible for baking.
Can I substitute plant milk using the same grams?
Mostly yes. Almond, oat, and soy milks have densities close to dairy, so 245 g per cup is a safe swap by weight. Sweetened or thickened versions can run slightly heavier.
How many grams are in half a cup of milk?
About 123 grams, which is half of 245. For a quarter cup, use roughly 61 grams.