CookingCups to Grams

All-Purpose Flour Cups to Grams

Updated: July 25, 2026 · Source: King Arthur Baking Ingredient Weight Chart (Practical ingredient volume-to-weight reference used for the stated ingredient basis.)

Methodology·How We Verify

Snapshot

1 cup of all-purpose flour equals 120 grams. Conversion Encyclopedia keeps one fixed ingredient basis on this page so the calculator, common values, and reverse page stay aligned.

Reference basis: 120 g per 1 US cup.
Example: For 1/2 US cup of all-purpose flour, the result is 60 grams.
Source basis: King Arthur Baking Ingredient Weight Chart.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

120 Grams

Switch

120 grams

With 1 cup of All-Purpose Flour, that equals 120 grams.

Machine access

Available to apps and AI agents

All-Purpose Flour Cups to Grams can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The all-purpose-flour identifier tells the conversion engine which ingredient record to use for the same calculation shown by the calculator.

Machine-readable identifiers

Conversion family: cooking
Source unit: cup_us
Target unit: gram
Ingredient: all-purpose-flour

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "cooking",
  "value": 1,
  "from": "cup_us",
  "to": "gram",
  "material": "all-purpose-flour"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "cooking",
    "value": 1,
    "from": "cup_us",
    "to": "gram",
    "result": {
      "raw": 120,
      "display": "120"
    },
    "canonicalPath": "/cooking/cups-to-grams/all-purpose-flour/"
  }
}

Full API documentation

Explanation

All-purpose flour is sensitive to measuring technique: scooping directly from a bag can compact more flour than spooning it into a cup and leveling the top. This converter uses a level US cup at 120 grams, which is a practical baking reference rather than a claim that every filled cup has identical mass.

Multiply US cups by 120 grams per cup. Use a kitchen scale when recipe accuracy matters, especially for bread, pastry, or large batches.

All-purpose Flour uses a reviewed reference of 120 grams per US cup in this dataset. Evidence status: high-confidence. Source basis: King Arthur Ingredient Weight Chart (All-Purpose Flour: 1 cup = 120g)

Particle size, aeration, settling, and whether the cup is scooped or spoon-filled can materially change the mass held by the same volume.

Conversion Basis

Multiply US cups by 120 grams per cup. Use a kitchen scale when recipe accuracy matters, especially for bread, pastry, or large batches.
For 1/2 US cup of all-purpose flour, the result is 60 grams.
The snapshot, calculator, common values, and reverse route use the same conversion basis.
Source: King Arthur Baking Ingredient Weight Chart (Practical ingredient volume-to-weight reference used for the stated ingredient basis.)

Reference & Scope

King Arthur Baking lists one cup of all-purpose flour at 120 grams and recommends weighing flour for the most consistent result.

Values are calculated from one explicit conversion basis.
Displayed results are rounded only after the underlying calculation.
Real measured materials and ingredients can vary from the stated reference basis.
Source: King Arthur Baking Ingredient Weight Chart (Practical ingredient volume-to-weight reference used for the stated ingredient basis.)

Common Conversion Values

Cup	Grams
0.25	30
0.33	40
0.5	60
0.75	90
1	120
1.5	180
2	240
3	360

Methodology

All-purpose Flour: cups to grams evidence

Direction calculation: All-purpose Flour — 1 US cup equals 120 grams. Reference: 120 g/US cup. Source basis: King Arthur Ingredient Weight Chart (All-Purpose Flour: 1 cup = 120g)

Among the 35 reviewed records labeled Flours & Grains, the nearest factor to All-purpose Flour is Bread Flour at 120 g/cup: a difference of 0 g/cup (0.0% relative to All-purpose Flour). The observed range in this labeled group is Panko Breadcrumbs at 80 g/cup to Pearl Barley at 213 g/cup.

Particle size, aeration, settling, and whether the cup is scooped or spoon-filled can materially change the mass held by the same volume.

Questions & answers

Frequently Asked Questions

What can change a All-purpose Flour measurement?

Particle size, aeration, settling, and whether the cup is scooped or spoon-filled can materially change the mass held by the same volume. The converter preserves one documented reference so repeated calculations remain comparable.

How many grams are in 1 cup of all-purpose flour?

This converter uses 120 grams for 1 level US cup of all-purpose flour.

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

Half a US cup equals 60 grams with the 120-gram cup basis.

Why can a cup of flour weigh more than 120 grams?

Scooping, packing, humidity, flour brand, and cup technique can change the measured mass. A scale avoids that variation.