Convert Plain Flour from Ounces to Cup (US)
How many US cups is 1 ounce of plain flour?
1 ounce of plain flour (All-Purpose Flour) is 0.21 US cups. 2 ounces of plain flour is 0.42 US cups. 4 ounces of plain flour is 0.84 US cups. 6 ounces of plain flour is 1.27 US cups. Use the converter below for any amount.
- These figures use the US cup (240 ml). A metric cup is slightly larger at 250 ml, so it holds a little more. Use the metric cup converter →
- Cup sizes are not standard worldwide, so the same cup of an ingredient can weigh more or less depending on the country. What is a cup measurement →
- Flour settles, so a cup's weight depends on how it is filled. This page uses 140 g for a metric cup spooned and levelled. Sifted it can drop to about 125 g; scooped and packed it can reach 160 g. Weigh for the most reliable result.
More about measuring Plain Flour
Related Plain Flour Ingredients
Cake flour is softer and lower in protein than plain flour (around 7 to 9% vs 10 to 12%), giving a more tender crumb. It is lighter per cup (130 g vs 140 g); for a quick stand-in when out of cake flour, sift 1 cup of plain flour with 2 tablespoons removed and replaced with cornstarch. See our Cake Flour converter.
Bread flour carries more protein than plain flour (around 12 to 14% vs 10 to 12%), giving stronger gluten and a chewier crumb in yeasted bakes. It is slightly heavier per cup (150 g vs 140 g); swap by weight in pizza, sandwich loaves, and bagels for a more open, chewy texture. See what 1 ounce of bread flour is in US cups.
Self-raising flour is plain flour with baking powder already blended in, matched in weight per cup (140 g each). Use the self-raising flour calculator to make your own from plain flour, or swap to plain flour and add your own leavener. See what 1 ounce of self raising flour is in US cups.
Out of plain flour? See plain flour substitutes →
No scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.
Weigh it exact, get a scalePlain Flour Measurement Converter
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0.21 Cup (US)Plain Flour Calculators & Baking Tools
Working with plain flour? These tools handle the jobs a converter cannot.
- Self-Raising Flour Calculator Turn plain flour into self-raising with the right baking powder and salt.
- Pan Size Converter Rescale a recipe for a different cake tin size.
- Oven to Air Fryer Converter Match the temperature and time when you swap the oven for an air fryer, fan oven, or slow cooker.
- Recipe Scaler Scale any recipe up or down and keep every ingredient in ratio.
Common Plain Flour Conversions
Here are the most common plain flour conversions from ounces to cups (US).
| Ounces | Cups (US) |
|---|---|
| 1 oz | 0.21 cups (US) |
| 2 oz | 0.42 cups (US) |
| 3 oz | 0.63 cups (US) |
| 4 oz | 0.84 cups (US) |
| 5 oz | 1.05 cups (US) |
| 6 oz | 1.27 cups (US) |
| 8 oz | 1.69 cups (US) |
| 10 oz | 2.11 cups (US) |
| 12 oz | 2.53 cups (US) |
For the reverse conversion, see 1 US cup of plain flour in ounces.
Frequently Asked Questions
- How many US cups is 1 ounce of plain flour?
- 1 ounce of plain flour is 0.21 US cups. The conversion is fixed, so 2 ounces is 0.42 US cups and 4 ounces is 0.84 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones. Open the plain flour converter
- How many US cups is 2 ounces of plain flour?
- 2 ounces of plain flour is 0.42 US cups. The conversion is fixed, so 1 ounce is 0.21 US cups and 4 ounces is 0.84 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
- What is 4 oz plain flour in US cups?
- 4 ounces of plain flour is 0.84 US cups. The conversion is fixed, so 1 ounce is 0.21 US cups and 2 ounces is 0.42 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
- What is 6 oz plain flour in US cups?
- 6 ounces of plain flour is 1.27 US cups. The conversion is fixed, so 1 ounce is 0.21 US cups and 2 ounces is 0.42 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.