How Many Grams in a Cup of Milk?

Whole milk is a staple liquid in baking, providing moisture, protein, and browning through lactose. One US cup of whole milk weighs approximately 244 grams—slightly heavier than water because of fat, protein, and dissolved solids. Reduced-fat and skim milk weigh marginally less per cup but 244 grams remains the standard whole-milk conversion.

Measure milk in a liquid measuring cup on a level surface at eye level, or weigh directly. For baking precision, weight beats volume especially when recipes list metric amounts. Scaled-down recipes benefit from weighing 61 grams per quarter cup rather than eyeballing partial lines on a cup.

Mistakes include substituting milk with cream without adjusting fat content, which changes tenderness and browning. Using a dry measuring cup for milk introduces small errors. Confusing US cups (240 mL nominal) with milk weight ignores that milk density exceeds water slightly.

Store milk refrigerated at or below 40°F and use by the sell-by date. Substitute buttermilk with acidified milk for baking, or plant milks at similar weights though protein differences affect structure. Heavy cream at 238 grams per cup adds richness but is not a direct one-to-one swap in all recipes.

Milk at 244 grams per cup bridges wet and dry recipe math when scaling custards, pancakes, and enriched doughs that list volume in American cookbooks but grams in professional formulas. Whole milk fat carries flavor; substituting skim changes mouthfeel though weight stays close. When heating milk for bread dough, measure before warming because slight evaporation during scalding reduces volume if you measure hot milk in a cup. Plant milks vary in density—oat and soy often fall near dairy milk weight but always confirm with a scale when precision matters for custards that set by protein coagulation.

When baking enriched doughs, warm milk to about 110°F before mixing with yeast, but measure at room temperature first so the 244-gram standard reflects what the recipe author intended.