Yeast Converter
Convert between instant, active dry, and fresh yeast. Active dry = instant × 1.25, fresh = instant × 3.
Yeast Converter
Convert between instant, active dry, and fresh yeast
Tip: a standard US packet is 7g (¼ oz, about 2¼ teaspoons).
Yeast Conversion Chart
All three yeast types can leaven the same dough — they just pack different amounts of leavening power per gram:
| Instant Yeast | Active Dry Yeast | Fresh Yeast |
|---|---|---|
| 5g | 6.3g | 15g |
| 7g (1 packet) | 8.8g | 21g |
| 10g | 12.5g | 30g |
| 15g | 18.8g | 45g |
| 20g | 25.0g | 60g |
| 25g | 31.3g | 75g |
| 42g | 52.5g | 126g (3 cubes) |
A US packet of dry yeast is 7g (¼ oz, about 2¼ teaspoons). A standard fresh yeast cube is 42g in Europe (US cakes are 17g).
How to Substitute Each Type
Instant Yeast
Mix directly into the dry ingredients — no proofing needed. Also sold as "rapid-rise" or "bread machine" yeast.
Active Dry Yeast
Dissolve in warm water (40-43°C / 105-110°F) for 5-10 minutes before using. Modern active dry can often skip this, but proofing confirms it's alive.
Fresh Yeast
Crumble into the liquid or rub into the flour. Prized by professional bakers for flavor, but it only keeps about two weeks.
Frequently Asked Questions
What is the difference between instant and active dry yeast?
Instant yeast has finer granules and more live cells per gram, so it can be mixed straight into dry ingredients. Active dry yeast has larger granules with a coating of inactive cells, which is why it is traditionally dissolved in warm water first and why you need about 25% more of it.
Can I substitute instant yeast for active dry 1:1?
For small amounts (under 10g) a 1:1 swap usually works — your dough may just rise slightly faster or slower. For precision, use 25% less instant yeast than the active dry amount called for, or 25% more active dry than instant.
How much fresh yeast equals a 7g packet of dry yeast?
One 7g packet of active dry yeast equals about 17g of fresh yeast (roughly 40% of a standard 42g cube). One 7g packet of instant yeast equals about 21g fresh — half a cube.
Does converting yeast types change the rise time?
Slightly. Instant yeast works about 10-15% faster than active dry even at equivalent amounts. Watch the dough, not the clock — it is ready when doubled in size regardless of yeast type.
How long does yeast keep?
Unopened dry yeast lasts about 2 years. Once opened, store it airtight in the fridge (4 months) or freezer (6+ months). Fresh yeast only keeps about 2 weeks refrigerated. Test old yeast by proofing it in warm water with a pinch of sugar — it should foam within 10 minutes.