What is the ratio between active dry and instant yeast?

Instant yeast is more potent than active dry yeast. The standard ratio is 1 teaspoon of active dry yeast equals approximately 0.75 teaspoons (3/4 tsp) of instant yeast. When going the other way, multiply instant yeast by 1.33 to get the active dry equivalent.

How much fresh yeast equals active dry yeast?

Fresh (cake) yeast has a much higher moisture content and lower concentration of yeast cells per gram. The standard conversion is 1 teaspoon of active dry yeast equals approximately 0.4 oz (11 g) of fresh yeast, or a ratio of about 3:1 by weight (fresh to active dry).

Do I need to proof active dry yeast before using it?

Traditional active dry yeast benefits from proofing (dissolving in warm liquid first) to confirm it is active. Modern active dry yeast is finely granulated and can often be added directly to flour like instant yeast, though proofing is still recommended for reliability.

Can I use instant yeast instead of active dry yeast without changing anything else in the recipe?

Yes, with two adjustments: use 25% less instant yeast (multiply by 0.75), and you can skip the proofing step since instant yeast dissolves directly into dry ingredients. Rise times may also be slightly shorter.

What is the shelf life of each yeast type?

Active dry and instant yeast stored in sealed packaging last 1-2 years at room temperature, or longer when refrigerated or frozen. Fresh yeast is highly perishable and lasts only 2-3 weeks refrigerated. Always check the expiration date and proof dry yeasts you have had for a while.

How much is 1 packet of yeast in teaspoons and grams?

One standard packet of active dry or instant yeast contains 7 g (1/4 oz), which is about 2.25 teaspoons. Most bread recipes for one to two loaves call for a single packet.

How do I convert fresh yeast to dry yeast?

Multiply the fresh yeast weight by about 0.4 to get active dry yeast, or by 0.33 to get instant yeast. For example, 21 g of fresh yeast equals roughly 8.4 g (about 2.75 tsp) of active dry yeast.

Yeast Converter

Name: Yeast Converter
Availability: InStock
Author: Nham Vu

Enter an amount of any yeast type and instantly get the equivalent quantities for active dry, instant, and fresh yeast.

Enter Your Yeast Amount

Enter the quantity and type you have — all equivalents update instantly.

Amount

Unit

I have this type of yeast:

Active Dry Yeast Standard granules, needs proofing

Instant Yeast Rapid-rise, bread machine, no proofing

Fresh Yeast Cake yeast, moist block, perishable

Conversion Ratios Used

Active Dry : Instant = 1 : 0.75
Active Dry : Fresh = 1 : 3.0 (by weight)
Active Dry density = ~2.83 g/tsp
Instant density = ~3.1 g/tsp
Fresh yeast density = ~4.0 g/tsp

Active Dry Yeast

Standard granules — proof in warm liquid first

Instant Yeast

Rapid-rise, bread machine — no proofing needed

Fresh Yeast (Cake Yeast)

Moist block — refrigerate, use within 2–3 weeks

Substitution Tips

Instant yeast can be added directly to dry ingredients without proofing.
When substituting instant for active dry, reduce quantity by 25%.
Fresh yeast must be crumbled and dissolved in warm liquid before use.
Rise times are shorter with instant yeast — watch the dough, not the clock.

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Summary

Enter an amount of any yeast type and instantly get the equivalent quantities for active dry, instant, and fresh yeast.

How it works

Enter the quantity of yeast you have.
Select the unit: teaspoons, grams, or ounces.
Select the type of yeast you are starting with.
The equivalent amounts for all three yeast types appear instantly.
Use the copy button to copy any result to your clipboard.

Use cases

Substitute instant yeast when a recipe calls for active dry yeast.
Use fresh yeast (cake yeast) instead of dry yeast from a packet.
Scale a bread recipe and verify correct yeast quantities.
Convert a European recipe that lists fresh yeast into instant yeast.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu