How many gram is 1 ounce of all-purpose flour?

1 ounce of all-purpose flour weighs approximately 28 gram. This is based on a density of 0.53 g/ml for all-purpose flour.

How do I measure all-purpose flour accurately?

For accurate all-purpose flour measurement, spoon the flour into your measuring cup and level it off with a knife. Don't scoop directly from the bag, as this compacts the flour and gives you more than intended.

Why should I weigh all-purpose flour instead of using cups?

Weighing all-purpose flour gives more consistent results than volume measurements. A cup of all-purpose flour can vary by 10-20% depending on how it's measured (spooned vs scooped). Professional bakers always weigh ingredients for this reason.

Why does all-purpose flour have a specific cup-to-gram conversion?

All-Purpose Flour has a density of 0.53 g/ml, meaning each milliliter weighs 0.53 grams. Different ingredients have different densities—for example, flour is lighter than sugar—which is why each needs its own conversion factor.

All-Purpose Flour

Ounce to Gram

Ingredient

Amount

From

Result

28g

high confidence USDA source

All-Purpose Flour — Quick Reference

Common ounce to gram conversions

All-Purpose Flour: Ounce to Gram conversion table
Ounce	Gram
1oz	28g
2oz	57g
3oz	85g
4oz	113g
5oz	142g
6oz	170g
8oz	227g
10oz	283g

Based on all-purpose flour density of 0.53 g/ml (spooned method). Source: USDA FoodData Central.

Understanding All-Purpose Flour Conversions

The Math Behind This Conversion

To convert 1 ounces of all-purpose flour to grams, multiply by 28.3495 (the number of grams per ounce). So 1oz × 28.3495 = 28.3g.

Measurement Tip

For accurate all-purpose flour measurements, spoon the flour into your measuring cup and level it with a straight edge. Never scoop directly from the bag—this compacts the flour and can give you up to 30% more than intended, which will make your baked goods dense and dry.

About Our Data

The density value of 0.53 g/ml for all-purpose flour is from the USDA FoodData Central database (ID: 169761). This measurement was taken with all-purpose flour spooned into the measuring cup and leveled. Different measurement methods affect the density: sifted (0.45 g/ml), packed (0.63 g/ml), loose (0.5 g/ml).

View source data on USDA FoodData Central (ID: 169761)

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