1/2 Cup Pastry Flour in Grams

1/2 cup of pastry flour weighs 53 g (spooned and levelled, King Arthur Baking). A full cup weighs 106 g, so the half cup is exactly half of that. Low-protein flour between cake and all-purpose flour in strength. All the figures on this page are approximate conversions based on the King Arthur Baking value, so when a recipe really matters, verify with a kitchen scale.

Why weighing pastry flour beats measuring it in cups

Half a cup of pastry flour weighs 53 g, lighter than a half cup of all-purpose flour at 60 g, because pastry flour is low in protein and milled to a soft, fine texture that does not pack as tightly. Pastry flour sits between cake flour and all-purpose flour in strength: it has enough protein to give a pie crust structure, but not so much that the crust turns tough. That balance is why it is the first choice for pie crusts, tarts, biscuits and scones, where tenderness matters more than chew.

Half a cup is the amount in a single pie crust, a small batch of scones, or a tart base for two, and the flour weight decides whether the pastry is tender or tough. Too much flour and the pastry is dry and hard to roll; too little and it is sticky and falls apart. Pastry flour is forgiving compared with bread flour, because its low protein means less gluten develops, but it still needs to be weighed: a scooped half cup can be 10 g heavy, and that error is enough to change the texture. Keep the butter cold, handle the dough as little as possible, and let it rest before rolling.

Pastry Flour cups to grams conversion table

Cups Grams Tablespoons
1/8 cup 13.2 g 2
1/4 cup 26.5 g 4
1/3 cup 35.3 g 5.3
1/2 cup 53 g 8
2/3 cup 70.7 g 10.7
3/4 cup 79.5 g 12
1 cup 106 g 16
1 1/2 cups 159 g 24
2 cups 212 g 32
3 cups 318 g 48

The table is built around the half cup, which is the measure this page is about, with the full-cup weight of 106 g as the anchor. Every row is the full-cup weight multiplied by the fraction, so the numbers stay consistent as you scale up or down. One tablespoon of pastry flour weighs about 6.6 g, which is useful when a recipe calls for a spoonful rather than a cup.

Worked examples

A single pie crust for one pie

A single pie crust uses about 1/2 cup of pastry flour, which is 53 g, mixed with a little more white flour, cold butter, salt and iced water. Weigh 53 g rather than measuring by cups, because pastry flour is light and a scooped half cup can be heavy. Cut the cold butter into the flour until it resembles coarse crumbs, add iced water a spoonful at a time, and chill the dough before rolling.

Scones for a morning tea, a batch of 6

A batch of 6 scones uses about 1/2 cup of pastry flour, which is 53 g, mixed with white flour, baking powder, butter, milk and a little sugar. Weigh the flour so the scones are tender rather than tough: pastry flour is low in protein, and the tenderness depends on getting the amount right. Handle the dough as little as possible and bake in a hot oven.

A tart base for two

A tart base for two people uses about 1/2 cup of pastry flour, which is 53 g, mixed with cold butter, sugar and an egg yolk. Weigh 53 g so the pastry is crisp and tender: too much flour and the base is dry, too little and it is sticky. Chill the pastry before rolling, line the tin, and bake blind until golden.

How the weight was measured

The figure on this page comes from King Arthur Baking, measured spooned and levelled unless the method line says otherwise. Spooning means filling the cup with a spoon rather than plunging the cup into the bag, and levelling means sweeping a knife across the rim. Scooping packs the ingredient down and can add a fifth or more to the weight, which is why two bakers following the same cup-based recipe can get visibly different results.

Confidence in this value is high. That reflects how consistent the ingredient is from brand to brand: a uniform, factory-packed ingredient is more predictable than a fresh, variable one. Even a high-confidence figure is still an approximation, because moisture, grind size and settling all shift the weight a little. Treat the grams on this page as a reliable starting point and check with a scale when the recipe is fussy, expensive, or being made for the first time.

Practical guidance

Store pastry flour in an airtight container in a cool, dry place for up to 1 year, because it absorbs moisture and kitchen smells. Always spoon the flour into the cup and level it, never scoop, because pastry flour is light and compresses easily. Keep the butter cold and handle the dough as little as possible, because warmth and handling develop gluten and make the pastry tough. Chill the dough before rolling, and roll it on a lightly floured surface. If you do not have a scale, spoon the flour loosely into the half cup and level it, remembering that the 53 g figure is approximate.

Common mistakes with half-cup measures

The most common mistake is treating a half cup as a casual measure. Half a cup of flour is 60 g, and a scooped half cup can easily weigh 70 g or more, which is a 15 percent error in a recipe that may only contain two or three cups of flour in total. Small measures carry the largest relative errors, so weighing matters more, not less, at this size. The second mistake is using a liquid measuring jug for dry flour: the meniscus line is designed for liquids, and flour measured in a jug is almost always over- or under-filled. Use a dry cup, or a scale. The third is assuming every flour weighs the same per half cup: the flours on this page range from about 42 g to about 82 g per half cup, so swapping flours cup for cup without adjusting the weight changes the recipe. Finally, do not pack flour into the half cup to make it look full: spoon and level, every time.

Frequently asked questions

How many grams is 1/2 cup of pastry flour?

1/2 cup of pastry flour weighs 53 g when spooned and levelled, according to King Arthur Baking, which lists 106 g per cup. The figure is approximate, because flour settling varies, so verify with a kitchen scale when it matters.

What is pastry flour used for?

Pie crusts, tarts, biscuits and scones, where tenderness matters more than chew. Pastry flour is low in protein and sits between cake flour and all-purpose flour in strength, so it gives a tender crumb without being as delicate as cake flour.

Can I use all-purpose flour instead of pastry flour?

Yes, but the pastry will be slightly tougher, because all-purpose flour has more protein. Use the same weight rather than the same volume, because pastry flour is lighter per cup at 53 g per half cup compared with 60 g for all-purpose flour.

Why is my pie crust tough?

Often because the flour was scooped rather than spooned and levelled, so the pastry had too much flour, or because the dough was over-handled and the gluten developed. Weigh 53 g per half cup, keep the butter cold, and handle the dough as little as possible.

How many cups is 100 g of pastry flour?

100 g of pastry flour is about 0.94 cups, or just under 1 cup. At 106 g per cup, divide 100 by 106 to get the answer, and use a scale for the most accurate result.

Related conversions

If you need a different amount, the table above scales in both directions, and the converter tool will do the maths for any quantity. When a recipe really matters, weigh the ingredient on a kitchen scale rather than trusting the cup alone, because the figures on this page are approximate and natural ingredients vary by brand, variety and moisture.