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How Much Is 18.9 Cups of Chia Seeds in Ounces?

18.9 cups of chia seeds equals 108.67 oz. Chia seeds has a density of 163g per cup (163g per cup), which means it's moderate weight compared to other common cooking ingredients. For comparison, 18.9 cups of all-purpose flour would be 83.44 oz.

18.9 cups of chia seeds
=
108.67oz
Result using all cup standards info
108.67 oz (US) 114.83 oz (Metric Cup) 130.51 oz (Imperial Cup)
18.9 cups of chia seeds is also
108.67

Formula and Step-by-Step

cups × 163g/cup ÷ 28.3495g/oz = ounces
  1. Start with 18.9 cups of chia seeds
  2. 1 cup of chia seeds = 163g
  3. 18.9 × 163 = 3,080.7g
  4. Convert grams to ounces: 3,080.7 ÷ 28.3495 = 108.67 oz

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

Measuring Tip

Chia seeds are small and pack tightly. Pour them into the measuring cup and level off without shaking, which settles the seeds and increases the weight.

Chia Seeds at Different Amounts

How chia seeds scales across common cups measurements. Your amount (18.9 cups) is highlighted.

0.75 cups4.31 oz1 cup5.75 oz1.5 cups8.62 oz2 cups11.50 oz3 cups17.25 oz4 cups23.00 oz5 cups28.75 oz18.9 cups108.67 oz

Other Amounts of Chia Seeds

Cups US Ounces Metric Cup Imperial Cup
0.25 cups 1.44 oz 1.52 oz 1.73 oz
0.33 cups 1.90 oz 2.00 oz 2.28 oz
0.5 cups 2.87 oz 3.04 oz 3.45 oz
0.75 cups 4.31 oz 4.56 oz 5.18 oz
1 cup 5.75 oz 6.08 oz 6.91 oz
1.5 cups 8.62 oz 9.11 oz 10.36 oz
2 cups 11.50 oz 12.15 oz 13.81 oz
3 cups 17.25 oz 18.23 oz 20.72 oz
4 cups 23.00 oz 24.30 oz 27.62 oz
5 cups 28.75 oz 30.38 oz 34.53 oz
18.9 cups 108.67 oz 114.83 oz 130.51 oz

Understanding the Units

What is a Cup?

The US cup (236.588 ml) is slightly smaller than the metric cup used in Australia and some other countries (250 ml). When following recipes from different countries, check which cup standard is being used.

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.

Frequently Asked Questions

About 108.67 oz, based on chia seeds having a density of 163g per cup. The exact amount depends on how the ingredient is measured and the specific product.
Multiply the number of cups by 163 (grams per cup for chia seeds), then divide by 28.3495 to convert grams to ounces. For 18.9 cups: 18.9 × 163 = 3,080.7g, then 3,080.7 ÷ 28.3495 = 108.67 oz.
For the most accurate results, weigh chia seeds on a kitchen scale. If measuring by volume, spoon the ingredient into the measuring cup and level it off with a straight edge rather than scooping directly.
Weight-per-cup values vary because of differences in how the ingredient is measured (spooned vs scooped), grind size, moisture content, and settling during storage. Our values use standardized measurement methods from established culinary references.
Reverse the conversion: 108.67 oz × 28.3495 = 3,080.7g, then 3,080.7g ÷ 163 = 18.9 cups. Or use the Ounces to Cups converter.