Features
Tools
Calculator Yeast Converter Temperature Converter Cups to Grams DDT Calculator
FAQ Blog
Language
Google Play
Free Online

Fresh Yeast to Dry Yeast Converter

Convert fresh yeast to active dry yeast or instant yeast by grams, packets, teaspoons, ounces, or pounds. Enter an amount, pick your type, and get instant results.

Quick amounts
Yeast type

Baker's %, pizza dough & sourdough — all in one free app. Get Flourwise Free →

Fresh yeast to dry yeast: quick answers

The most searched conversions from fresh yeast to active dry yeast and instant yeast. Use active dry yeast as the standard dry yeast unless your recipe says instant.

Search Equivalent Also
5g fresh yeast 2.5g active dry yeast 1.7g instant yeast
10g fresh yeast 5g active dry yeast 3.3g instant yeast
12g fresh yeast 6g active dry yeast 4g instant yeast
15g fresh yeast 7.5g active dry yeast 5g instant yeast
20g fresh yeast 10g active dry yeast 6.7g instant yeast
21g fresh yeast 10.5g active dry yeast 7g instant yeast
25g fresh yeast 12.5g active dry yeast 8.3g instant yeast
42g fresh yeast / 1 cube 21g active dry yeast 14g instant yeast
50g fresh yeast 25g active dry yeast 16.7g instant yeast
7g instant yeast 21g fresh yeast 10.5g active dry yeast
7g dry yeast 14g fresh yeast 4.7g instant yeast
1g fresh yeast 0.5g active dry yeast 0.3g instant yeast
fresh yeast to dry yeast ratio 2:1 by weight Fresh ÷ 2 = active dry; fresh ÷ 3 = instant

For long cold fermentation, reduce the yeast amount after converting. Active dry yeast usually needs proofing in warm water; instant yeast can be mixed straight into the flour.

Fresh Yeast to Dry Yeast Ratio

The simple home-baking rule for switching between fresh, active dry, and instant yeast

3 Fresh
1.5 Active Dry
1 Instant

The common home-baking rule is simple: fresh yeast ÷ 2 = active dry yeast, fresh yeast ÷ 3 = instant. So 42g fresh yeast is equivalent to 21g active dry or 14g instant yeast. These ratios are convenient for home recipes; some professional references use a stricter fresh × 0.4 ratio for active dry yeast.

  • This calculator uses the common home-baking ratio: fresh yeast ÷ 2 = active dry, fresh yeast ÷ 3 = instant.
  • Some professional charts use fresh yeast × 0.4 for active dry. Use that stricter ratio when a bakery formula or manufacturer chart specifies it.
  • Active dry usually needs blooming before mixing into the dough; instant yeast can go straight into flour and is best reduced for long cold fermentation.

Fresh to Dry Yeast Conversion Chart

Fresh yeast, active dry yeast, and instant yeast equivalents

Read across the row that matches your original recipe, then swap in the yeast type you have on hand. Each row shows the exact equivalent amount — no other changes to your dough formula needed.

Fresh Yeast Active Dry Yeast Instant Yeast
1g 0.5g 0.3g
5g 2.5g 1.7g
7g 3.5g 2.3g
10g 5g 3.3g
21g 10.5g 7g
42g 21g 14g
100g 50g 33.3g

This chart uses the common home-baking conversion ratio. If you are following a professional formula that uses fresh yeast × 0.4 for active dry yeast, use that manufacturer ratio instead.

Saving the recipe in Flourwise lets you scale the dough later without redoing the math. Yeast and every other ingredient adjust together.

Fresh, Active Dry & Instant Yeast: Types Explained

How each yeast format behaves in real baking

Knowing the ratio is only half the job. The other half is understanding how each yeast type behaves in storage, in mixing, and over a long fermentation.

Fresh Yeast (Compressed / Wet Yeast)

Also called cake yeast, compressed yeast, or wet yeast. It has the mildest flavor and gives bread a slightly sweeter, more complex taste. Professional bakers often prefer it for its reliable and gentle leavening. It has a high moisture content (~70% water) which is why you need more of it by weight — and why it is not a direct 1:1 equivalent to dried yeast.

Storage: Refrigerate at 0-4°C. Use within 2-3 weeks. Can be frozen for up to 3 months (may lose ~10% potency).
Tip: Crumble directly into flour or dissolve in lukewarm liquid (max 35°C). If it smells sour or has brown spots, discard it.

Active Dry Yeast

Also known simply as dry yeast. It consists of granulated yeast with a protective coating of dead yeast cells. It is usually dissolved ("proofed") in warm water (38-43°C) for 5-10 minutes before use to activate it. Slightly slower to start working than instant yeast, but produces identical results once active.

Storage: Store unopened at room temperature until the expiration date. Once opened, refrigerate and use within 4 months.
Tip: Always proof in warm water with a pinch of sugar. If it doesn't foam after 10 minutes, the yeast is dead — don't use it.

Instant Yeast (Rapid-Rise / Fast-Acting)

Also called rapid-rise, quick-rise, fast-acting yeast, or bread machine yeast. The granules are smaller and more porous than active dry, so they dissolve on contact with dough — no proofing needed. It works faster than active dry yeast. Some brands (like SAF Gold) are osmotolerant, designed for sweet and enriched doughs.

Storage: Store unopened at room temperature for up to 2 years. Once opened, refrigerate in an airtight container and use within 6 months.
Tip: Mix directly into dry ingredients. For cold doughs or long fermentation, reduce the amount by 20-25% to avoid over-proofing.

Planning a long cold proof? The Flourwise schedule tells you when to mix, when to fold and when to bake. Useful when 24-hour timing matters more than the yeast itself.

Frequently Asked Questions

How to convert fresh yeast to active dry yeast?
The common home-baking conversion ratio is: fresh yeast ÷ 2 = active dry yeast, fresh yeast ÷ 3 = instant. So if a recipe calls for 21g fresh yeast, use 10.5g active dry or 7g instant. Per 500g flour, a typical amount is 15g fresh, 7.5g active dry, or 5g instant yeast. Active dry is usually dissolved in warm water (105–110°F / 40–43°C) before use, while instant mixes directly into flour. For long cold fermentation (12–24 hours), reduce yeast to ¼ of the standard amount.
Can I use active dry yeast as a fresh yeast substitute?
Yes, all three types — fresh yeast, active dry yeast, and instant yeast — are interchangeable in most recipes. Just use the correct fresh yeast to dry yeast conversion ratio: fresh ÷ 2 = active dry, fresh ÷ 3 = instant. The only difference is preparation: active dry yeast is usually dissolved in warm water first, while instant can go straight into dry ingredients.
Why does the conversion ratio work?
Fresh yeast contains about 70% water, while dry yeast forms have most moisture removed. Active dry yeast is more concentrated than fresh, and instant yeast is more concentrated again. The common home-baking shortcut uses half as much active dry or a third as much instant compared to fresh yeast; professional formulas may use a slightly lower active dry amount.
Do I need to proof instant yeast?
No. Instant yeast granules are small enough to dissolve directly in the dough without proofing. Just mix it into the dry ingredients. However, if your instant yeast has been open for a while and you're unsure if it's still alive, you can test it by sprinkling it into warm water with a pinch of sugar — it should foam within 5 minutes.
How much yeast should I use per 500g of flour?
For a standard bread with 1–2 hours of rising time at room temperature: about 15–21g fresh yeast, 7.5–10g active dry, or 5–7g instant (roughly 1 standard packet). In US cup measurements, that's about 1 teaspoon instant or 1¼ tsp active dry per 2 cups of flour. For overnight or cold fermentation (8–18 hours), reduce to about 3–5g fresh, 1.5–2.5g active dry, or 1–1.5g instant. Less yeast + more time = better flavor and texture.
Can I use sourdough starter instead of commercial yeast?
Yes, but it's not a direct substitution. A 100% hydration sourdough starter (equal parts flour and water) can replace commercial yeast, but you'll need to adjust the flour and water in your recipe to compensate. As a rough guideline, use 20–30% starter relative to flour weight and expect longer fermentation times (4–12 hours vs 1–2 hours with commercial yeast).
Does yeast type affect the taste of bread?
Slightly. Fresh yeast gives a milder, slightly sweeter flavor. Dry yeasts can sometimes produce a faint "yeasty" taste, especially if used in larger amounts. However, the biggest factor in bread flavor is fermentation time — longer, slower fermentation (regardless of yeast type) develops more complex flavors through enzyme activity and organic acid production.
How much dried yeast equals fresh yeast? (1 cake conversion)
A small fresh yeast cake (0.6 oz / 17g) equals one standard packet of active dry yeast (7g / 2¼ tsp) in many consumer charts. A full-size cake (2 oz / 57g) equals about three packets. In Europe, the standard fresh yeast cube is 42g, which equals 21g active dry yeast or 14g instant by the common home-baking ratio. If your recipe calls for a "cake of yeast," it almost always means the small 0.6 oz cake.
How much yeast is in a standard packet?
A standard US packet of dry yeast (active dry or instant) contains 7g (0.25 oz / 2¼ teaspoons). One packet is enough to raise up to 4 cups of flour. Instant yeast packets contain the same weight (7g) but the granules are finer, so they measure out to slightly more than 2¼ tsp by volume. Most bread recipes calling for “1 packet” of yeast are written for 500–600g of flour.

Related Tools

Baker’s Percentage Calculator

Calculate bread and pizza dough recipes with hydration tracking, preferments, and water content in eggs & dairy.

Temperature Converter

Convert between Fahrenheit and Celsius for baking. Includes baking temperature charts for bread, pizza, and pastries.

Cups to Grams Conversion Chart

Convert cups to grams for 15 baking ingredients. Includes reverse grams-to-cups table and per-ingredient breakdown.

Baking Guides — Bread, Pizza & Sourdough

Fresh yeast, active dry yeast, and instant yeast compared side by side Bread Baking

Active Dry vs Instant vs Fresh Yeast

Understand when to use each yeast type, how manufacturer ratios differ, and why the bread usually tastes the same.

Read article
Baker's percentage quick reference chart Bread Baking

Baker's Percentage Chart

Complete reference chart for baker's percentage with common bread formulas, hydration ranges, and ingredient ratios.

Read article
Sourdough hydration crumb comparison Hydration

Sourdough Hydration Chart

Visual guide to sourdough hydration levels — what each percentage looks and feels like, from stiff to high-hydration doughs.

Read article
Poolish vs biga vs levain comparison Hydration

Poolish vs Biga vs Levain

Side-by-side comparison of the three major preferments — when to use each one, hydration ratios, and flavor differences.

Read article
DDT calculator desired dough temperature guide Bread Baking

DDT Calculator Guide

How to calculate desired dough temperature for consistent fermentation — the formula, friction factor, and practical tips.

Read article
Flourwise Android App
Google Play