Leaveners, Salt & Spices
Convert cups of active dry yeast to ounces
One cup of active dry yeast weighs about 5.26 oz, and half a cup comes to roughly 2.63 oz. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 cup of active dry yeast =
5.26 oz
- kg
- 0.149
- lb
- 0.328
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
cups to ounces chart for active dry yeast
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Cups (US) | Grams | Ounces (weight) | Pounds |
|---|---|---|---|
| 1/8 cup | 18.6 g | 0.657 oz | 0.041 lb |
| 1/4 cup | 37.3 g | 1.31 oz | 0.082 lb |
| 1/3 cup | 49.7 g | 1.75 oz | 0.109 lb |
| 1/2 cup | 74.5 g | 2.63 oz | 0.164 lb |
| 2/3 cup | 99.3 g | 3.5 oz | 0.219 lb |
| 3/4 cup | 112 g | 3.94 oz | 0.246 lb |
| 1 cup | 149 g | 5.26 oz | 0.328 lb |
| 1 1/2 cup | 224 g | 7.88 oz | 0.493 lb |
| 2 cup | 298 g | 10.5 oz | 0.657 lb |
| 3 cup | 447 g | 15.8 oz | 0.985 lb |
| 4 cup | 596 g | 21 oz | 1.31 lb |
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 cups figure is converted into millilitres or grams using standard unit sizes (cup = 237 ml).
- 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 ounces are in 1 cup of active dry yeast?
1 cup of active dry yeast is 5.26 oz. This is based on a density of 149 g per US cup.
How many ounces are in 2 cups of active dry yeast?
2 cups of active dry yeast is 10.5 oz, and 2.63 oz for half a cup.
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.