Measure well. Cook your way.

All-purpose flour

One US cup of all-purpose flour is estimated at 120 grams using our reference. How you fill the cup matters.

Reference ingredient

120 g per US cup

All-purpose flour · Spoon into the cup and level; do not pack

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Ingredient

Spoon into the cup and level; do not pack

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50 grams of all-purpose flour is about

0.42

US cups

Approximate recipe equivalent for All-purpose flour. Ingredient preparation and measuring technique affect the result.

Reference: 120 g per 236.5882 ml US reference cup. More precision: 0.4167 US cups.

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Volume depends on the ingredient and the measuring method. Results crossing weight and volume are recipe estimates.

All-purpose flour conversions at a glance

Reference: 120 grams per US cup, spoon into the cup and level; do not pack. Values are approximate.

Grams of all-purpose flour to US cups
All-purpose flour weight	US cups	Kitchen measure
30 g	0.25	¼ cups
50 g	0.42	a little over ⅓ cups
100 g	0.83	a little over ¾ cups
120 g	1	1 cup
150 g	1.25	1 ¼ cups
200 g	1.67	1 ⅔ cups
250 g	2.08	a little under 2 ⅛ cups

Cups of all-purpose flour to grams
Cups	US cup (236.59 ml) → g	Metric cup (250 ml) → g
0.25 cups	30	31.7
0.3333 cups	40	42.27
0.5 cups	60	63.4
0.6667 cups	80	84.54
0.75 cups	90	95.1
1 cup	120	126.8
2 cups	240	253.61

Spoons of all-purpose flour to grams by system
Spoon	US (14.79 / 4.93 ml)	Metric (15 / 5 ml)	Australian (20 / 5 ml)
1 tbsp	7.5	7.61	10.14
1 tsp	2.5	2.54	2.54

A bowl of flour with a measuring spoon and a jug of milk

Your recipe. Your measuring method.

Spoon, level, then cook.

A light, level cup gives a different weight from a firmly packed scoop. A kitchen scale helps keep the amount repeatable.

How to measure ingredients

How to convert all-purpose flour

Our reference is 120 grams per US reference cup of all-purpose flour, spoon into the cup and level; do not pack. That works out to about 0.5072 grams per millilitre, so cups = grams ÷ 120 and grams = cups × 120 in US customary measures.

For metric and Australian recipes the cup holds 250 ml, so one cup of all-purpose flour is about 126.8 grams. Australian tablespoons hold 20 ml rather than 15 ml, which the calculator handles when you pick that system.

Preparation changes the weight

The reference describes all-purpose flour as: spoon into the cup and level; do not pack. A different form, such as sifted, packed, melted, chopped or cooked, can hold a different weight in the same cup and needs its own reference. When a recipe gives a gram amount, weigh that amount instead of converting.

Brand, moisture and how firmly the cup is filled all move the practical result. Treat the numbers here as recipe equivalents, not laboratory densities.

Where the number comes from

The reference comes from King Arthur Baking ingredient weight chart, which lists 1 cup as 120 grams. Published recipe weight, normalised to one reference cup. This site assigns the published cup weight to its adopted US reference cup of 236.5882365 ml; the source itself does not define an exact millilitre cup volume. Checked September 25, 2026.

A few useful answers

Kitchen questions, answered.

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

About 120 grams per US customary cup (spoon into the cup and level; do not pack), or about 126.8 grams per 250 ml metric cup, using our reference.

How many cups are 100 grams of all-purpose flour?

About 0.83 US cups. Use the calculator for any other amount or cup system.

Can I substitute a similar ingredient?

A measurement conversion does not establish a recipe substitution. Two ingredients can weigh the same per cup and still behave differently in a recipe; follow the recipe author's substitution guidance.

Sources behind the numbers

Sources checked September 25, 2026. Ingredient values are recipe equivalents, not laboratory densities.