How many grams is 1 US cup of plain flour?

1 US cup of plain flour is 134.4 grams. The conversion scales in a straight line, so 0.5 US cups is 67.2 grams and 2 US cups is 268.8 grams. Multiply or divide that figure to match whatever your recipe needs, or use the converter above for an exact grams reading at any amount.

How many US cups of plain flour is 134.4 grams?

134.4 grams of plain flour is 1 US cup. The conversion works the same in reverse, so you can switch between US cups and grams without changing the result. This helps when a recipe lists one unit but you would rather measure in the other. The converter above and the chart below cover both directions for any amount.

Why does a cup of flour vary in weight?

Flour compresses easily, so how you fill the cup changes the weight. Spooned lightly and levelled, a metric cup of plain flour is about 140 grams. Sifted first it can fall to around 125 grams, while scooping straight from the bag and packing it down can push it to 160 grams. For consistent baking, weigh flour on a scale rather than measuring by cup.

Convert Plain Flour from Cup (US)

How much is 1 US cup of plain flour?

1 US cup of plain flour (All-Purpose Flour) is 134.4 grams, about 4.74 ounces. 0.5 US cups of plain flour is 67.2 grams and 2 US cups is 268.8 grams. Use the converter below for any amount.

Flour settles, so a cup's weight depends on how it is filled. This page uses 140 g for a metric cup spooned and levelled. Sifted it can drop to about 125 g; scooped and packed it can reach 160 g. Weigh for the most reliable result.

Plain flour (also known as all-purpose flour) is one of the most commonly used ingredients in baking and cooking. It has a moderate protein content, making it versatile enough for pastries, breads, sauces, and coatings. In the UK, Australia, and New Zealand, it’s called plain flour, while in the US and Canada, it’s known as all-purpose flour.

Since different countries use different measurement systems (and flour can settle when scooped), converting between grams, cups, and tablespoons helps ensure your recipes turn out just right. Use this page to easily convert plain flour for any recipe.

Also known as

All-Purpose Flour

Plain Flour Calculator

Don't have self-raising flour? Use our calculator to make it from scratch.

Self Raising Flour Calculator

Cake flour is softer and lower in protein than plain flour (around 7 to 9% vs 10 to 12%), giving a more tender crumb. It is lighter per cup (130 g vs 140 g); for a quick stand-in when out of cake flour, sift 1 cup of plain flour with 2 tablespoons removed and replaced with cornstarch. See our Cake Flour converter.

Bread flour carries more protein than plain flour (around 12 to 14% vs 10 to 12%), giving stronger gluten and a chewier crumb in yeasted bakes. It is slightly heavier per cup (150 g vs 140 g); swap by weight in pizza, sandwich loaves, and bagels for a more open, chewy texture. See our Bread Flour converter.

Self-raising flour is plain flour with baking powder already blended in, matched in weight per cup (140 g each). Use the self-raising flour calculator to make your own from plain flour, or swap to plain flour and add your own leavener. See our Self Raising Flour converter.

Out of plain flour? See plain flour substitutes →

No measuring cups? The tool below gets you close, and a measuring cup set keeps every batch the same.

Plain Flour Measurement Converter

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Common Plain Flour Conversions

Here are the most common plain flour conversions from cups (US) to grams.

Cups (US)	Grams
0.25 cups (US)	33.6 g
0.5 cups (US)	67.2 g
0.75 cups (US)	100.8 g
1 cup (US)	134.4 g
1.25 cups (US)	168 g
1.5 cups (US)	201.6 g
2 cups (US)	268.8 g
2.5 cups (US)	336 g
3 cups (US)	403.2 g

Plain Flour Conversion Chart

The conversion chart below gives a quick reference for converting plain flour from Cup (US) to other measurements.

cup(US)	cup	grams	ounces	tbsp	tsp
0.25 cup (US)	0.24 cup	33.6 g	1.19 oz	4 tbsp	12 tsp
0.5 cup (US)	0.48 cup	67.2 g	2.37 oz	8 tbsp	24 tsp
1 cup (US)	0.96 cup	134.4 g	4.74 oz	16 tbsp	48 tsp
2 cup (US)	1.92 cup	268.8 g	9.48 oz	32 tbsp	96 tsp

Frequently Asked Questions

How much is 1 US cup of plain flour?: 1 US cup of plain flour is 134.4 grams, or 4.74 ounces. The ratio is fixed, so 0.5 US cups of plain flour is 67.2 grams and 2 US cups is 268.8 grams. Whatever unit your recipe uses, enter the amount in the converter above or read the conversion chart on this page for the most common quantities. Open the plain flour converter
How many grams is 1 US cup of plain flour?: 1 US cup of plain flour is 134.4 grams. The conversion scales in a straight line, so 0.5 US cups is 67.2 grams and 2 US cups is 268.8 grams. Multiply or divide that figure to match whatever your recipe needs, or use the converter above for an exact grams reading at any amount.
How many US cups of plain flour is 134.4 grams?: 134.4 grams of plain flour is 1 US cup. The conversion works the same in reverse, so you can switch between US cups and grams without changing the result. This helps when a recipe lists one unit but you would rather measure in the other. The converter above and the chart below cover both directions for any amount.
Why does a cup of flour vary in weight?: Flour compresses easily, so how you fill the cup changes the weight. Spooned lightly and levelled, a metric cup of plain flour is about 140 grams. Sifted first it can fall to around 125 grams, while scooping straight from the bag and packing it down can push it to 160 grams. For consistent baking, weigh flour on a scale rather than measuring by cup.

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