Nuts, Seeds & Butters
Convert ounces of chia seeds to cups
One ounce of chia seeds weighs about 0.167 cup, and half a ounce comes to roughly 0.083 cup. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 oz of chia seeds =
0.167 cup
About 1/8 cup in recipe notation
- ml
- 39.5
- tbsp
- 2.67
Chia Seeds: 170 g per US cup · USDA FoodData Central. Measure dry. Chia absorbs up to 12 times its weight in liquid once hydrated.
Full chia seeds chart →Chia Seeds at a glance
Every number on this page comes from a single figure: 170 grams per US cup (USDA FoodData Central).
- 1 cup
- 170 g
- 1 tablespoon
- 10.6 g
- 1 teaspoon
- 3.54 g
- 1 cup in ounces
- 6 oz
- 100 g in cups
- 0.588 cups
- Density
- 0.72 g/ml
ounces to cups chart for chia seeds
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Ounces (weight) | Cups (US) | Tablespoons (US) | Millilitres |
|---|---|---|---|
| 0.5 oz | 0.083 cup | 1.33 tbsp | 19.7 ml |
| 1 oz | 0.167 cup | 2.67 tbsp | 39.5 ml |
| 2 oz | 0.334 cup | 5.34 tbsp | 78.9 ml |
| 3 oz | 0.5 cup | 8 tbsp | 118 ml |
| 4 oz | 0.667 cup | 10.7 tbsp | 158 ml |
| 5 oz | 0.834 cup | 13.3 tbsp | 197 ml |
| 6 oz | 1 cup | 16 tbsp | 237 ml |
| 8 oz | 1.33 cup | 21.3 tbsp | 316 ml |
| 12 oz | 2 cup | 32 tbsp | 473 ml |
| 16 oz | 2.67 cup | 42.7 tbsp | 631 ml |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat chia seeds as 170 g per US customary cup, which works out to 0.719 g/ml. From there:
- Your ounces figure is converted into millilitres or grams using standard unit sizes (oz = 28.3 g).
- The density above bridges volume and weight in whichever direction you need.
- The result is rounded the way a cook would round it — to the nearest gram, or to a usable fraction such as 5/8 cups.
Measuring chia seeds accurately
Measure dry. Chia absorbs up to 12 times its weight in liquid once hydrated.
If a recipe matters to you — bread, macarons, anything with a tight hydration or ratio — weigh it. A £10 digital scale removes the single largest source of variation in home baking, and it is faster than washing three measuring cups.
When cups are fine
- Liquids measured in a proper jug, where volume is the honest unit anyway.
- Forgiving savoury cooking: soups, stews, stir-fries, marinades.
- Small amounts of leaveners and spices, as long as you use level spoons.
Frequently asked questions
How many cups are in 1 ounce of chia seeds?
1 ounce of chia seeds is 0.167 cup. This is based on a density of 170 g per US cup.
How many cups are in 2 ounces of chia seeds?
2 ounces of chia seeds is 0.334 cup, and 0.083 cup for half a ounce.
How much is 100 g of chia seeds in cups?
100 g of chia seeds is about 5/8 cups. Weight is always the more reliable measurement, so use a scale when the recipe gives grams.
Why do other sites give a different number for chia seeds?
Measure dry. Chia absorbs up to 12 times its weight in liquid once hydrated.
Do UK and Australian cups give the same result?
No. A US customary cup is 236.6 ml, a metric cup used in Australia and New Zealand is 250 ml, and an old UK imperial cup is 284 ml. Our default is the US cup, but you can pick metric cups in the converter.