Yeast Conversion Chart (Active Dry, Instant, Fresh)

Yeast comes in three common forms, and recipes rarely list all of them. Active dry yeast and instant (also sold as rapid-rise, quick-rise, or bread machine yeast) are the shelf-stable granules most home bakers keep on hand. Fresh yeast, also called cake or compressed yeast, is a moist block sold refrigerated and favored by many professional bakers. All three do the same job of leavening dough, but they differ in moisture, potency, and how you add them. This chart gives you reliable conversions by teaspoon and by weight so you can bake any recipe with whatever yeast you have.

How to use this chart

Find the yeast type your recipe calls for, then read across to the type you actually have. Weighing yeast on a kitchen scale is the most accurate method, especially for fresh yeast, but the teaspoon amounts work well for everyday baking. The gram figures assume standard granulated yeast; a level teaspoon of active dry or instant yeast weighs roughly 3.1 grams. When in doubt, measure by weight.

The core weight ratios to remember: active dry to instant is about 1 to 0.9 (use a little less instant, or the same amount for simplicity). Active dry to fresh is about 1 to 2.5, so use roughly two and a half times the weight when going to fresh yeast, and about 0.4 times the weight (two-fifths) when going from fresh to active dry. Instant to fresh is roughly 1 to 3.

When to bloom (proof) your yeast

• Active dry yeast: Bloom it. Stir into warm liquid at 105 to 110°F (41 to 43°C) with a pinch of sugar and wait 5 to 10 minutes until foamy. Modern active dry dissolves faster than old formulas, but blooming still confirms the yeast is alive.
• Instant / rapid-rise yeast: No blooming needed. Mix it directly into the dry flour. If you prefer to proof it, use liquid at 120 to 130°F (49 to 54°C) when added to dry ingredients, or 105 to 110°F (41 to 43°C) if dissolving in liquid alone.
• Fresh (cake) yeast: Crumble into warm liquid at 95 to 100°F (35 to 38°C) and stir until dissolved. It blends easily and does not require a foaming test, though a few minutes confirms activity.
• Always check the expiration date. Water hotter than about 130°F (54°C) begins killing yeast, so avoid guessing with hot tap water.

Substitution tips

• Swapping instant for active dry (or vice versa) is the easiest change. Use the same amount; instant simply rises a bit faster and can skip the bloom.
• Rapid-rise and instant are essentially the same product, milled to dissolve fast. Rapid-rise is designed for a single, shorter rise, so it suits quick recipes and bread machines.
• When you switch to instant, subtract a couple tablespoons of liquid used for blooming, since you are no longer dissolving the yeast separately.
• Fresh yeast has the shortest shelf life, about 2 weeks refrigerated. It has a slightly milder flavor and gives excellent oven spring, which is why many artisan bakers prefer it.
• Rising times vary by dough richness, room temperature, and how much yeast you use. Judge doneness by the dough doubling in size, not by the clock. If a recipe involves a filling with chicken or other meat, cook it to a safe internal temperature of 165°F (74°C).

How much yeast is in one packet?

A standard packet holds 2 1/4 teaspoons, which equals 7 grams or about 1/4 ounce. This is true for both active dry and instant yeast. It leavens roughly 3 to 4 cups of flour.

Can I use instant yeast instead of active dry?

Yes. Use the same amount and add it straight to the dry ingredients without blooming. Instant yeast tends to rise faster, so start checking the dough a little earlier than the recipe states.

How do I convert fresh yeast to dry yeast?

Multiply the fresh weight by about 0.4 for active dry yeast, or by 0.33 for instant. To replace 30 grams of fresh yeast, use roughly 12 grams of active dry yeast (about 3 3/4 teaspoons) or about 10 grams of instant yeast.

Do I need to bloom active dry yeast?

Most modern active dry yeast can be mixed into flour, but blooming in warm liquid at 105 to 110°F (41 to 43°C) is the safest way to confirm it is alive before you commit it to a batch of dough.

Why did my dough not rise?

The most common causes are expired yeast, liquid that was too hot (above about 130°F / 54°C) and killed the yeast, or a room that was too cold. Bloom the yeast first to verify it foams, and let dough rise in a warm, draft-free spot.