Cups to Grams Converter for Flour, Sugar, Butter and More

This converter turns cups, tablespoons and teaspoons of 16 ingredients into grams by multiplying the volume by each ingredient’s density, taken from USDA FoodData Central’s weight for 1 US cup. You pick the cup standard, and the result names it.

Convert cups, tablespoons and teaspoons to grams, or back, for 16 baking and cooking ingredients, using the US, metric or Japan cup or the Taiwan rice cup.

Last updated: 2026-09-29

Ingredient

Amount

From

Result

125 g

1 US cup · All-purpose flour

Standard used: US cup = 236.5882 mL

Based on 125 g per US cup. Density used: 0.528 g per mL

Assumes: Spooned (fluffed) into the cup and levelled. Flour scooped or packed straight from the bag can weigh up to about 160 g per cup.

Grams in one cup, tablespoon and teaspoon

The same numbers the converter uses, for every ingredient. Spoon columns use the metric 15 mL tablespoon and 5 mL teaspoon unless marked US.

Ingredient	US cup	Metric cup	Japan cup	Taiwan rice cup	US tbsp	Metric tbsp	Metric tsp
All-purpose flour	125 g	132 g	106 g	95.1 g	7.81 g	7.92 g	2.64 g
Butter	227 g	240 g	192 g	173 g	14.2 g	14.4 g	4.8 g
Granulated sugar	200 g	211 g	169 g	152 g	12.5 g	12.7 g	4.23 g
Rice (uncooked white)	185 g	196 g	156 g	141 g	11.6 g	11.7 g	3.91 g
Bread flour	137 g	145 g	116 g	104 g	8.56 g	8.69 g	2.9 g
Brown sugar	220 g	232 g	186 g	167 g	13.8 g	13.9 g	4.65 g
Cake flour	137 g	145 g	116 g	104 g	8.56 g	8.69 g	2.9 g
Cocoa powder	86 g	90.9 g	72.7 g	65.4 g	5.37 g	5.45 g	1.82 g
Cornstarch	128 g	135 g	108 g	97.4 g	8 g	8.12 g	2.71 g
Honey	339 g	358 g	287 g	258 g	21.2 g	21.5 g	7.16 g
Milk	244 g	258 g	206 g	186 g	15.2 g	15.5 g	5.16 g
Powdered sugar	120 g	127 g	101 g	91.3 g	7.5 g	7.61 g	2.54 g
Rolled oats	81 g	85.6 g	68.5 g	61.6 g	5.06 g	5.14 g	1.71 g
Table salt	292 g	309 g	247 g	222 g	18.2 g	18.5 g	6.17 g
Vegetable oil	218 g	230 g	184 g	166 g	13.6 g	13.8 g	4.61 g
Water	237 g	250 g	200 g	180 g	14.8 g	15 g	5.01 g

How to use it

Pick an ingredient, type an amount and choose the units to convert from and to. Amounts can be written as decimals or kitchen fractions such as 1.5, 1 1/2 or ¾. The result updates as you type, and when a cup or spoon answer lands close to a common fraction, that fraction is shown as well. Under the result, the “Standard used” box lists the size of each cup or spoon involved in millilitres, the grams per US cup the calculation is based on, and the measuring method that figure assumes.

How the conversion works

Every conversion passes through millilitres. The converter first turns your amount into millilitres using the definition of the unit: a US cup is exactly 236.5882365 mL (NIST), a metric cup 250 mL, a Japan cup 200 mL and a Taiwan rice cup about 180 mL. It then multiplies by the ingredient’s density in grams per millilitre to get the weight. The density is simply the grams in one US cup divided by 236.588 mL. For all-purpose flour that is 125 ÷ 236.588, about 0.528 g per mL, so a metric cup of flour works out to about 132 g and a Japan cup to about 106 g.

The grams per cup come from USDA FoodData Central, checked against the King Arthur Baking ingredient weight chart. When the two disagree, each ingredient page shows the range. Converting between two volume units, such as cups to tablespoons, never uses the density at all, so those results are as exact as the unit definitions themselves.

When to double-check

A volume-to-weight answer can only be as good as the way the cup was filled. The same cup of flour can weigh 120 g spooned in gently or about 160 g scooped straight from the bag. Brown sugar is listed firmly packed at 220 g; filled loosely it is only about 145 g. If a recipe was written by weight, weigh it too. The converter is most useful the other way round, when you have a cup-based recipe and a kitchen scale.

Also confirm which cup the recipe means. A cup in a Japanese cookbook is 200 mL, in an Australian one 250 mL, and next to a rice cooker it is about 180 mL. The smallest and largest of these differ by 70 mL, which is enough to make a cake dry or a dough sticky, even though a soup or stir-fry would hardly notice.

Frequently asked questions

How many grams are in a cup of all-purpose flour?

This converter uses 125 g per US cup, the USDA figure. King Arthur Baking gives 120 g for flour that is fluffed, spooned in and levelled, so expect about 120 to 125 g if you fill the cup gently.

Why does a cup of sugar weigh more than a cup of flour?

A cup measures space, not weight. Sugar crystals are denser and leave fewer air gaps, so 1 US cup holds about 200 g of granulated sugar but only about 125 g of all-purpose flour.

Can I use this converter with a Japanese recipe?

Yes. Choose Japan cup (200 mL) as the unit. A Japanese recipe that says 1 cup of flour means about 106 g, not the 125 g of a US cup.

Is the Taiwan rice cup the same as a baking cup?

No. The cup that comes with a rice cooker holds about 180 mL, while a US cup holds about 236.6 mL and a metric cup 250 mL. Pick the one your recipe actually refers to.