Leaveners, Salt & Spices
Convert ounces of active dry yeast to cups
One ounce of active dry yeast weighs about 0.19 cup, and half a ounce comes to roughly 0.095 cup. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 oz of active dry yeast =
0.19 cup
About 1/4 cup in recipe notation
- ml
- 45
- tbsp
- 3.04
Active Dry Yeast: 149 g per US cup · NIST Handbook 133. 1 packet = 2 1/4 tsp = 7 g. Instant yeast can replace it 1:1 by weight without proofing.
Full active dry yeast chart →Active Dry Yeast at a glance
Every number on this page comes from a single figure: 149 grams per US cup (NIST Handbook 133).
- 1 cup
- 149 g
- 1 tablespoon
- 9.31 g
- 1 teaspoon
- 3.1 g
- 1 cup in ounces
- 5.26 oz
- 100 g in cups
- 0.671 cups
- Density
- 0.63 g/ml
ounces to cups chart for active dry yeast
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 | 0.095 cup | 1.52 tbsp | 22.5 ml |
| 1 oz | 0.19 cup | 3.04 tbsp | 45 ml |
| 2 oz | 0.381 cup | 6.09 tbsp | 90 ml |
| 3 oz | 0.571 cup | 9.13 tbsp | 135 ml |
| 4 oz | 0.761 cup | 12.2 tbsp | 180 ml |
| 5 oz | 0.951 cup | 15.2 tbsp | 225 ml |
| 6 oz | 1.14 cup | 18.3 tbsp | 270 ml |
| 8 oz | 1.52 cup | 24.4 tbsp | 360 ml |
| 12 oz | 2.28 cup | 36.5 tbsp | 540 ml |
| 16 oz | 3.04 cup | 48.7 tbsp | 720 ml |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat active dry yeast as 149 g per US customary cup, which works out to 0.630 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 2/3 cups.
Measuring active dry yeast accurately
1 packet = 2 1/4 tsp = 7 g. Instant yeast can replace it 1:1 by weight without proofing.
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 active dry yeast?
1 ounce of active dry yeast is 0.19 cup. This is based on a density of 149 g per US cup.
How many cups are in 2 ounces of active dry yeast?
2 ounces of active dry yeast is 0.381 cup, and 0.095 cup for half a ounce.
How much is 100 g of active dry yeast in cups?
100 g of active dry yeast is about 2/3 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 active dry yeast?
1 packet = 2 1/4 tsp = 7 g. Instant yeast can replace it 1:1 by weight without proofing.
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.