Ingredient Weights: Grams per Cup by Region

A cup is a volume, so its weight depends on the ingredient and on which cup you use. The table gives grams for one cup in each regional standard; the linked pages explain the measuring method and the sources.

Ingredient pages

All-purpose flourUS cup = 125 gGrams in a cup of all-purpose flour for US, metric and Japan cups and the Taiwan rice cup, plus tablespoons, teaspoons and why the answer depends on how you fill the cup.
Granulated sugarUS cup = 200 gGrams in a cup, tablespoon and teaspoon of granulated sugar, in US, metric and Japan cups and the Taiwan rice cup, with the source for each figure.
ButterUS cup = 227 gButter in grams per US cup, stick and tablespoon, and per metric and Japan cup, with notes on softened, melted and whipped butter.
Rice (uncooked white)US cup = 185 gGrams of uncooked white rice in a US cup, a metric cup, a Japan cup and the Taiwan rice cup that comes with rice cookers, and how much water to add.

Grams in one cup

Ingredient	Taiwan rice cup180 mL	Japan cup200 mL	UK cup227.3 mL	US cup236.6 mL	Metric cup250 mL
All-purpose flour	95.1	106	120	125	132
Butter	173	192	218	227	240
Granulated sugar	152	169	192	200	211
Rice (uncooked white)	141	156	178	185	196
Bread flour	104	116	132	137	145
Brown sugar	167	186	211	220	232
Cake flour	104	116	132	137	145
Cocoa powder	65.4	72.7	82.6	86	90.9
Cornstarch	97.4	108	123	128	135
Honey	258	287	326	339	358
Milk	186	206	234	244	258
Powdered sugar	91.3	101	115	120	127
Rolled oats	61.6	68.5	77.8	81	85.6
Table salt	222	247	281	292	309
Vegetable oil	166	184	209	218	230
Water	180	200	228	237	250

Grams in one cup of each ingredient, by regional cup. Figures assume the measuring method noted on each page.