How Much Is 1 Cup of All-Purpose Flour in Ounces?
1 cup of all-purpose flour weighs 4.41 oz. This is based on all-purpose flour having a density of 125.16g per cup. Because cups measure volume and ounces measure weight, the result depends on the ingredient, and a different ingredient would give a different result for the same 1 cup.
Formula and Step-by-Step
- Start with 1 cup of all-purpose flour
- 1 cup of all-purpose flour = 125.16g
- 1 × 125.16 = 125.16g
- Convert grams to ounces: 125.16 ÷ 28.3495 = 4.41 oz
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
Measuring Tip
Humidity affects all-purpose flour weight. In humid conditions, flour absorbs moisture and weighs more per cup. Store it in an airtight container for consistent results.
All-Purpose Flour at Different Amounts
How all-purpose flour scales across common cups measurements. Your amount (1 cup) is highlighted.
For reference, 1 cup of all-purpose flour (125.16g) is close in weight to a small apple (130g).
Other Amounts of All-Purpose Flour
| Cups | US Ounces | Metric Cup | Imperial Cup |
|---|---|---|---|
| 0.25 cups | 1.10 oz | 1.17 oz | 1.33 oz |
| 0.33 cups | 1.46 oz | 1.54 oz | 1.75 oz |
| 0.5 cups | 2.21 oz | 2.33 oz | 2.65 oz |
| 0.75 cups | 3.31 oz | 3.50 oz | 3.98 oz |
| 1 cup | 4.41 oz | 4.67 oz | 5.30 oz |
| 1.5 cups | 6.62 oz | 7.00 oz | 7.95 oz |
| 2 cups | 8.83 oz | 9.33 oz | 10.60 oz |
| 3 cups | 13.24 oz | 14.00 oz | 15.91 oz |
| 4 cups | 17.66 oz | 18.66 oz | 21.21 oz |
| 5 cups | 22.07 oz | 23.33 oz | 26.51 oz |
Understanding the Units
What is a Cup?
There are three cup standards used worldwide. The US cup (236.588 ml) is used in American recipes. The metric cup (250 ml) is standard in Australia, New Zealand, and some parts of Asia. The imperial cup (284.131 ml) appears in older British and Canadian recipes. A metric cup holds about 5.7% more than a US cup, while an imperial cup holds about 20% more. Using the wrong standard can noticeably affect a recipe.
What is an Ounce?
An ounce (oz) is a US customary unit of weight equal to 28.3495 grams or 1/16 of a pound. In cooking, "ounces" refers to weight (avoirdupois ounces), not fluid ounces which measure volume.