Home / Conversions /Milk
Milk:
grams to cups.
One cup of milk weighs 240 g — the same as water, because milk is about 87% water. Whole, 2%, and skim milk all measure within a few grams of each other per cup, making milk one of the most consistent liquid measurements in baking.
Milk: grams to cups
Approximate cup fractions for common gram amounts. Based on 240 g per cup.
| Grams | Cups (approx) | Decimal |
|---|---|---|
| 25 g | ⅙ | 0.10 |
| 50 g | ¼ | 0.21 |
| 100 g | ½ | 0.42 |
| 150 g | ⅔ | 0.63 |
| 200 g | ¾ | 0.83 |
| 250 g | 1 ⅛ | 1.04 |
| 500 g | 2 ⅙ | 2.08 |
Milk: cups to grams
Based on 240 g per cup.
| Volume | Grams (g) |
|---|---|
| 1 cup | 240 g |
| ¾ cup | 180 g |
| ½ cup | 120 g |
| ⅓ cup | 80 g |
| ¼ cup | 60 g |
| 1 tbsp | 15 g |
| 1 tsp | 5 g |
Convert milk instantly
Why whole milk, 2%, and skim milk all weigh the same per cup
Milk's density is primarily determined by its water content, which makes up about 87–88% of all types of fluid milk. The fat removed in low-fat and skim milk is replaced by slightly denser water and proteins, so the overall density barely changes. Whole milk (3.25% fat) weighs about 244 g per cup; skim milk weighs about 246 g per cup — both so close to 240 g that for any recipe purpose, the distinction is irrelevant. When scaling a recipe that calls for milk in cups, use 240 g per cup regardless of fat percentage.
When milk quantity matters: custards, batters, and enriched breads
In most quick bread, muffin, and cake recipes, milk quantity is forgiving — being 5–10% off doesn't visibly change the result. But in egg-based custards, panna cotta, and béchamel sauce, milk-to-egg or milk-to-starch ratios control whether the final texture sets properly. Similarly, enriched yeast doughs (brioche, milk bread) rely on precise milk quantities to control hydration and fat content. In these applications, measuring milk by weight — even though liquids are easy to measure by volume — eliminates errors from meniscus reading and imperfect cup fill levels.
Frequently asked questions
- How many grams is 1 cup of milk?
- 1 cup of milk weighs 240 g, regardless of whether it's whole, 2%, or skim.
- How many grams is ½ cup of milk?
- ½ cup of milk weighs 120 g.
- How many cups is 500 g of milk?
- 500 g ÷ 240 g/cup ≈ 2.08 cups — just over 2 cups.
Common substitutions
| Substitute for milk | Ratio | Notes |
|---|---|---|
| Buttermilk | 1:1 by weight | Adds acidity — reduce baking powder by ½ tsp and add ¼ tsp baking soda per cup swapped. Good for pancakes, cakes, quick breads. |
| Oat milk / soy milk | 1:1 by weight | Both weigh ~240 g/cup. Flavour is neutral; oat milk adds a hint of sweetness. Works in most baked goods. |
| Water + 1 tbsp butter | 240 g water + 14 g butter per cup milk | Approximates whole milk fat content. Use when dairy-free options are unavailable. |
Related guides
Convert your full recipe — not just milk
Paste your entire ingredient list into Recipe Converter Pro and every cup, tablespoon, and gram converts instantly — including milk, flour, sugar, butter, and more.