Convert active dry, instant, fresh yeast, and sourdough starter planning amounts with weight, teaspoon, packet, and process guidance. Use it to test different inputs quickly, compare outcomes, and understand the main factors behind the result before moving on to related tools or deeper guidance.
Last updated
Quick swaps
Compare direct dry-yeast substitutions or switch to the sourdough planning mode when you need a starter estimate rather than a one-line packaged-yeast swap.
Conversion inputs
Use grams for the most reliable comparisons. Teaspoon conversions are practical for dry yeast, while sourdough starter planning is shown in grams and cups because starter also changes flour, water, and fermentation timing.
Equivalent amount
5.25 g (1.69 tsp) of Instant / Rapid-Rise Yeast
Based on 7 g, which equals 7 g of active dry yeast.
Active dry baseline
2.26 tsp
Packet equivalent
1 packets
Conversion type
Direct yeast swap
Best use
Straight doughs where you want to mix yeast directly into dry ingredients.
Conversion sheet
Dry-yeast conversions are mostly weight swaps. Starter conversions are different because the starter brings flour, water, acidity, and much longer fermentation with it.
Source amount
7 g
Target equivalent
5.25 g (1.69 tsp)
Target weight
5.25 g
Target teaspoons
1.69 tsp
Target cups
Not used for this type
Process note
Usually mixed straight into flour; many bakers use about 25% less instant than active dry by weight.
Baking notes
Instant yeast is commonly used at about 25% less weight than active dry yeast and usually does not need proofing.
Yeast converter for active dry, instant, fresh, and sourdough starter swaps
A yeast converter is most useful when it explains not just the number, but the process difference behind the swap. This page compares active dry, instant, fresh yeast, and sourdough starter planning amounts so you can judge the weight, timing, and fermentation tradeoffs before changing a bread recipe.
What a yeast converter should answer before you bake
Most bakers search for a yeast converter when they need to replace one type of leavening with another without derailing the dough. The practical question is usually not just how many grams to use, but whether the replacement behaves at the same speed, needs proofing, or changes the rest of the formula.
That is why this converter keeps a direct active-dry baseline in view. It lets you compare dry-yeast swaps by weight, teaspoon, and packet equivalents, while treating sourdough starter as a planning estimate instead of pretending it is a direct like-for-like packaged yeast substitution.
Active dry, instant, and fresh yeast are related, but not identical
Active dry and instant yeast are often close enough to substitute in ordinary bread recipes, but they do not behave exactly the same way. Instant yeast gets moving faster and is commonly mixed straight into flour, while active dry is traditionally proofed or at least expected to rise a little more slowly at the start.
Fresh yeast is a different form again. Bakers often use roughly two and a half times as much fresh yeast by weight as active dry yeast, and they usually crumble it into liquid or dough rather than measuring it like a shelf-stable dry ingredient. The result can still be excellent, but storage life, handling, and rise timing are different.
active dry equivalent grams = source grams ÷ source ratio
Converts any source yeast amount into an active-dry baseline so every other comparison stays on the same footing.
target grams = active dry equivalent grams × target ratio
Uses the target yeast type’s ratio to estimate the direct replacement weight.
Worked examples: instant yeast and fresh yeast swaps
If a formula calls for 7 grams of active dry yeast and you want to use instant yeast instead, a common planning number is about 5.25 grams of instant yeast. The dough may also rise a bit faster, so the weight is only part of the adjustment. You still need to watch the dough rather than the clock.
Now reverse that logic for fresh yeast. A recipe written with 5 grams of instant yeast may need a much larger fresh-yeast weight to produce a similar amount of leavening. The total is still easy to calculate, but the handling changes because fresh yeast is soft, perishable, and commonly dissolved or crumbled into liquid.
Instant yeast is often used at about 25% less weight than active dry yeast.
Fresh yeast commonly needs a much larger weight than dry yeast to deliver similar leavening.
Packet counts are helpful for planning, but grams are more reliable than packet labels or teaspoons.
Rise speed can still change even when the weight conversion is mathematically correct.
Why sourdough starter conversions are only planning estimates
Sourdough starter is not just another dry yeast format. It brings flour, water, acids, and a living fermentation culture into the dough, so replacing commercial yeast with starter changes hydration, fermentation time, flavour, and often structure. That means a starter number is useful for planning, but it is not a guarantee that the recipe can be swapped without wider adjustments.
Use the starter mode as a rough starting point for recipe adaptation, not as a one-line substitute for any bread formula. If you convert to starter, expect to subtract some flour and water elsewhere in the recipe and to allow much longer proofing or bulk-fermentation time than a commercial yeast version would need.
Fleischmann’s — Yeast 101 — Manufacturer guide describing common substitution rules, including using 25% more active dry yeast than instant yeast in RapidRise-style recipes.
Not exactly. They are often interchangeable in ordinary bread recipes, but instant yeast typically acts faster and is commonly mixed straight into dry ingredients. Active dry yeast is slower off the mark and is often proofed first or given a little more rise time. The weight may be close, but the process can still change.
How much fresh yeast should I use instead of dry yeast?
A common baking rule is that fresh yeast needs a larger weight than active dry or instant yeast to do similar work. This converter uses a fresh-yeast weight that is much higher than the dry-yeast baseline, which matches the way many bakery references handle fresh cake yeast. Measure by grams when possible, because fresh yeast is too variable to judge accurately by rough spoon measures.
Do I need to proof active dry yeast before using it?
Sometimes, but not always. Many bakers still proof active dry yeast in warm liquid to confirm that it is alive and to get it started, especially in older recipes. Other modern recipes mix it directly into dry ingredients. The key point is that active dry and instant yeast are not identical in handling, so the recipe method still matters even when the conversion weight is clear.
Can sourdough starter replace commercial yeast one-for-one?
No. Starter can replace commercial yeast in the broader recipe sense, but not as a direct one-line substitution. It changes hydration, flour balance, acidity, flavour, and fermentation time. Use the starter output here as a planning estimate, then adjust the rest of the formula and expect a slower, longer fermentation process.
