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How Much Is 18.9 Cups of Self-Rising Flour in Ounces?

Converting 18.9 cups of self-rising flour to ounces gives 80.00 oz. One cup of self-rising flour weighs 120g, so 18.9 cups is 18.9 × 120 = 2,268g (80.00 oz). This conversion is specific to self-rising flour because each ingredient has a different density.

18.9 cups of self-rising flour
=
80.00oz
Result using all cup standards info
80.00 oz (US) 84.54 oz (Metric Cup) 96.08 oz (Imperial Cup)
18.9 cups of self-rising flour is also
80.00

Formula and Step-by-Step

cups × 120g/cup ÷ 28.3495g/oz = ounces
  1. Start with 18.9 cups of self-rising flour
  2. 1 cup of self-rising flour = 120g
  3. 18.9 × 120 = 2,268g
  4. Convert grams to ounces: 2,268 ÷ 28.3495 = 80.00 oz

The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.

Measuring Tip

Different flour types have very different weights per cup. Always check the specific flour your recipe calls for rather than using a generic "flour" conversion.

Self-Rising Flour at Different Amounts

How self-rising flour scales across common cups measurements. Your amount (18.9 cups) is highlighted.

0.75 cups3.17 oz1 cup4.23 oz1.5 cups6.35 oz2 cups8.47 oz3 cups12.70 oz4 cups16.93 oz5 cups21.16 oz18.9 cups80.00 oz

For reference, 18.9 cups of self-rising flour (2,268g) is close in weight to a 5 lb bag of flour (2,268g).

Other Amounts of Self-Rising Flour

Cups US Ounces Metric Cup Imperial Cup
0.25 cups 1.06 oz 1.12 oz 1.27 oz
0.33 cups 1.40 oz 1.48 oz 1.68 oz
0.5 cups 2.12 oz 2.24 oz 2.54 oz
0.75 cups 3.17 oz 3.35 oz 3.81 oz
1 cup 4.23 oz 4.47 oz 5.08 oz
1.5 cups 6.35 oz 6.71 oz 7.63 oz
2 cups 8.47 oz 8.95 oz 10.17 oz
3 cups 12.70 oz 13.42 oz 15.25 oz
4 cups 16.93 oz 17.89 oz 20.33 oz
5 cups 21.16 oz 22.36 oz 25.42 oz
18.9 cups 80.00 oz 84.54 oz 96.08 oz

Understanding the Units

What is a Cup?

A cup is a US customary unit of volume equal to 236.588 milliliters or 8 fluid ounces. It is the most common volume measurement in American recipes. One cup can be divided into 16 tablespoons or 48 teaspoons.

What is an Ounce?

Ounces are commonly used in US recipes for cheese, meat, chocolate, and other ingredients sold by weight. Many kitchen scales offer both gram and ounce readings.

Frequently Asked Questions

About 80.00 oz, based on self-rising flour having a density of 120g per cup. The exact amount depends on how the ingredient is measured and the specific product.
Multiply the number of cups by 120 (grams per cup for self-rising flour), then divide by 28.3495 to convert grams to ounces. For 18.9 cups: 18.9 × 120 = 2,268g, then 2,268 ÷ 28.3495 = 80.00 oz.
For the most accurate results, weigh self-rising flour on a kitchen scale. If measuring by volume, sift or whisk first to break up clumps, then spoon into the measuring cup and level off. Do not scoop directly from the bag.
Yes, quite a bit. If you spoon the flour into your measuring cup and level it off, you will get about 120 grams per cup. If you dip directly into the flour bag and sweep level, the flour packs tighter and you can end up with 132 to 150 grams per cup instead. This conversion uses the spoon-and-level method, which is the standard most baking references follow.
Reverse the conversion: 80.00 oz × 28.3495 = 2,268g, then 2,268g ÷ 120 = 18.9 cups. Or use the Ounces to Cups converter.