Convert Instant Yeast from Ounces to Cup (US)

How many US cups is 1 ounce of instant yeast?

1 ounce of instant yeast (fast-acting yeast) is 0.2 US cups. 2 ounces of instant yeast is 0.39 US cups. 1/2 ounce of instant yeast is 0.1 US cups. 1/4 ounce (0.25 ounce) of instant yeast is 0.05 US cups. Use the converter below for any amount.

Instant yeast is a finely milled dry yeast that mixes straight into dry ingredients without proofing first. One metric cup (250 ml) of instant yeast weighs around 150 grams or 5.29 ounces, though recipes almost always measure it by the teaspoon or sachet (a 7 g sachet equals about 2 1/3 teaspoons). It is the quickest route to a reliable rise in bread, pizza dough, and cinnamon rolls.

Yeast amounts are tiny but matter a lot: too little gives a dense loaf, too much an over-proofed one with a yeasty taste. Weighing in grams is far more accurate than scooping a teaspoon, especially when scaling a recipe up or down.

Also known as

  • fast-acting yeast
  • rapid rise yeast
  • bread machine yeast
  • quick yeast

Active dry yeast is granular and needs proofing in warm liquid before use, unlike instant yeast which goes straight into the dry mix. They are interchangeable 1:1 by weight, so the swap is about method rather than amount. See what 1 ounce of active dry yeast is in US cups.

No scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.

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Instant Yeast Measurement Converter

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Result

0.2 Cup (US)

Common Instant Yeast Conversions

Here are the most common instant yeast conversions from ounces to cups (US).

OuncesCups (US)
1 oz0.2 cups (US)
2 oz0.39 cups (US)
3 oz0.59 cups (US)
4 oz0.79 cups (US)
5 oz0.98 cups (US)
6 oz1.18 cups (US)
8 oz1.58 cups (US)
10 oz1.97 cups (US)
12 oz2.36 cups (US)

Instant Yeast Conversion Chart

The conversion chart below gives a quick reference for converting instant yeast from Ounces to Cup (US) and other measurements.

ouncescup(US)cupgramstbsptsp
2.5 oz0.49 cup (US)0.47 cup70.89 g7.88 tbsp23.63 tsp
5 oz0.98 cup (US)0.95 cup141.78 g15.75 tbsp47.26 tsp
7.5 oz1.48 cup (US)1.42 cup212.67 g23.63 tbsp70.89 tsp
10 oz1.97 cup (US)1.89 cup283.55 g31.51 tbsp94.52 tsp

For the reverse conversion, see 1 US cup of instant yeast in ounces.

Frequently Asked Questions

What is 1 ounce of instant yeast in US cups?
1 ounce of instant yeast is 0.2 US cups. The ratio is fixed, so 2 ounces of instant yeast is 0.39 US cups and 0.5 ounces is 0.1 US cups. Use the converter above for any quantity, or check the conversion chart on this page for the most common amounts at a glance. Open the instant yeast converter
How many US cups is 1.5 ounces of instant yeast?
1.5 ounces of instant yeast is 0.3 US cups. The ratio is fixed, so 1 ounce of instant yeast is 0.2 US cups and 2 ounces is 0.39 US cups. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
What is 2 ounces of instant yeast in US cups?
2 ounces of instant yeast is 0.39 US cups. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 ounce of instant yeast is 0.2 US cups, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact US cups reading.
How many ounces of instant yeast is 0.2 US cups?
0.2 US cups of instant yeast is 1.02 ounces. The conversion works the same in reverse, so you can switch between US cups and ounces without changing the result. This helps when a recipe lists ounces but you would rather weigh or measure in US cups. The converter above and the chart below cover both directions for any amount.
Are instant yeast and fast-acting yeast the same thing?
Yes. Fast-acting yeast is another name for instant yeast, so they are the same ingredient and convert identically. 1 ounce of instant yeast is 0.2 US cups under either name, and 2 ounces is 0.39 US cups. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.
What is 1/2 oz instant yeast in US cups?
1/2 ounce of instant yeast is 0.1 US cups. The ratio is fixed, so 1 ounce of instant yeast is 0.2 US cups and 2 ounces is 0.39 US cups. Half measures come up often when scaling a recipe down, and the figure divides cleanly. Use the converter above for any other amount, or the chart below for the common ones.
What is 1/4 oz instant yeast in US cups?
1/4 ounce (0.25 ounce) of instant yeast is 0.05 US cups. The ratio is fixed, so 1 ounce of instant yeast is 0.2 US cups and 2 ounces is 0.39 US cups. Quarter amounts often come up when scaling a recipe down step by step, and the figure divides cleanly. Use the converter above for any other quantity, or the chart below for the most common amounts.

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