How Many Grams in a Cup of Flour?
Get exact conversions for all flour types. One cup of all-purpose flour equals 125 grams when properly measured.
Quick Answer
1 cup of all-purpose flour = 125 grams (US Customary cup, 237 mL)
This assumes the flour is measured using the spoon-and-level method. The weight varies slightly by flour type and how you measure it.
Grams Per Cup by Flour Type
Different flours have different densities. Here are the exact conversions for common flour types using a standard US cup (237 mL):
Most common flour for baking
Higher protein content
Lighter, finer texture
Made from entire wheat kernel
Between all-purpose and cake flour
All-Purpose Flour Conversion Chart
| Cups | Grams | Ounces |
|---|---|---|
| 1/4 cup | 31g | 1.1 oz |
| 1/3 cup | 42g | 1.5 oz |
| 1/2 cup | 63g | 2.2 oz |
| 2/3 cup | 83g | 2.9 oz |
| 3/4 cup | 94g | 3.3 oz |
| 1 cup | 125g | 4.4 oz |
| 1 1/4 cups | 156g | 5.5 oz |
| 1 1/2 cups | 188g | 6.6 oz |
| 2 cups | 250g | 8.8 oz |
Why Flour Weight Varies
• Scooping flour packs it down, adding 15-20% more
• Humidity affects flour moisture content
• Different brands have slightly different densities
• Sifted flour weighs less per cup
• Use a digital kitchen scale for accuracy
• Spoon flour into cup, then level with knife
• Store flour in airtight container
• Use same brand consistently for recipes
How to Measure Flour Correctly
The Spoon-and-Level Method
- 1. Fluff the flour in its container with a spoon to aerate it
- 2. Spoon flour into your measuring cup until overflowing
- 3. Level off the excess with the straight edge of a knife
- 4. Avoid tapping or shaking the cup (this packs the flour)
This method gives you approximately 125g per cup, which is what most recipes assume.
Important: Cup Size Matters!
Not all cups are the same size. Using the wrong cup can significantly affect your results:
| Cup Type | Volume | Flour Weight |
|---|---|---|
| US Customary | 237 mL | 125g |
| Metric Cup | 250 mL | 132g |
| Imperial Cup | 284 mL | 150g |
Note: Most American recipes use US Customary cups (237 mL). UK/Australian recipes typically use metric cups (250 mL).
Frequently Asked Questions
2 cups of all-purpose flour equals 250 grams. This is based on the standard conversion of 125g per cup using the spoon-and-level measuring method.
The most accurate measurement is 125g per cup for all-purpose flour. Some sources say 120g, but 125g is the widely accepted standard for US recipes. If a recipe doesn't specify, assume 125g per cup.
1 cup of sifted all-purpose flour weighs approximately 110-115 grams. Sifting adds air to the flour, making it lighter and less dense per cup. Always measure flour before sifting unless the recipe specifies "1 cup sifted flour."