1 cup milk = 244 grams

Why milk conversions vary

A US cup of whole milk weighs 244 g — slightly more than water because of dissolved proteins, minerals, and butterfat. In baking the difference between 240 and 244 g rarely matters, which is why most recipes round milk to 240 ml per cup. For custards and pastry cream, where ratios are tight, use the gram value.

Our factor for milk — 244 g per US cup — comes from USDA FoodData Central. Weighing beats measuring cups for repeatability: a scale gives the same result every time regardless of how the ingredient settled, and it scales recipes cleanly. Note that a US cup (236.6 ml) and a metric cup (250 ml) are not the same; recipes from outside North America may assume the metric size, which shifts every weight by about five percent.

The table below lists the amounts bakers actually reach for — quarters, thirds, and halves of a cup through three full cups — computed directly from the factor above. The converter handles any other amount instantly and uses the exact same number, so the quick reference and the live result can never drift apart.