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Yeast Calculator / fresh yeast to active dry
Fleischmann's & Red Star Calibrated

Fresh Yeast to Active Dry Yeast Ratio & Weight Conversion

Verified bread baking conversion for Active Dry, Instant (RapidRise), and Fresh Compressed Yeast.

Exact Result
Divide Fresh Yeast by 3 (e.g. 15g Fresh = 5g Active Dry)
Standard Packets: 1/4 oz (7g)
2.25 level teaspoons · 0.75 tablespoons
Instant Yeast Multi-Unit Calculator

Dough Science & Fermentation Guide

Fresh yeast to active dry yeast follows the classic 3:1 culinary rule by weight. Because fresh yeast contains 70% water, divide the fresh yeast weight by 3 to get active dry yeast (e.g. 21g fresh yeast = 7g active dry = 1 packet).

If a vintage European recipe calls for a 42g block of fresh yeast (standard European supermarket cake), replace it with 14 grams (two standard 7g packets) of active dry yeast.

Universal Yeast Conversion Matrix

Fast conversion across packets, grams, teaspoons, and fresh cake yeast.

Measure Dry Grams Teaspoons Tablespoons Fresh Equivalent
1/4 Packet 1.75g approx. 1/2 tsp 1/6 tbsp 5.2g
1/2 Packet 3.5g approx. 1 1/8 tsp 1/3 tbsp 10.5g
1 Full Packet (Standard US) 7.0g 2 1/4 tsp (2.25 tsp) 3/4 tbsp 21.0g
1 1/2 Packets 10.5g approx. 3 3/8 tsp 1 1/8 tbsp 31.5g
2 Packets 14.0g 4 1/2 tsp 1 1/2 tbsp 42.0g
1 Teaspoon 3.1g 1.0 tsp 1/3 tbsp 9.3g
2 Teaspoons 6.2g 2.0 tsp 2/3 tbsp 18.6g
1 Tablespoon (3 tsp) 9.3g 3.0 tsp 1.0 tbsp 28.0g
2 Tablespoons 18.6g 6.0 tsp 2.0 tbsp 56.0g
5 Grams 5.0g approx. 1 5/8 tsp 1/2 tbsp 15.0g
10 Grams 10.0g approx. 3 1/4 tsp 1 tbsp 30.0g
15 Grams 15.0g approx. 4 7/8 tsp 1 5/8 tbsp 45.0g
20 Grams 20.0g approx. 6 1/2 tsp 2 1/8 tbsp 60.0g
1 Ounce (28.35g) 28.35g approx. 9 1/8 tsp 3.0 tbsp (4 packets) 85.0g

Yeast Pro-Tips & Fermentation Rules

The 3:1 Rule

1 part active dry yeast = 3 parts fresh compressed yeast by weight.

Standard Block Match

A 21g cube of fresh yeast equals one 7g packet of active dry.

Water Temperature

Dissolve fresh yeast in liquid at 90°F–95°F. Active dry requires 105°F–115°F.

Frequently Asked Questions

What is the ratio of fresh yeast to active dry yeast? +
The ratio is 3:1 by weight: use 3 times the weight of fresh yeast as active dry yeast (e.g. 21g fresh = 7g active dry).
How much fresh yeast equals 1 packet of active dry? +
One 7g packet of active dry yeast equals 21 grams of fresh cake yeast.
How do I store leftover fresh yeast? +
Wrap tightly in plastic wrap and store in the refrigerator for up to 2 weeks, or freeze for up to 3 months.

Related Yeast Queries

7g yeast to teaspoons →1 packet yeast in grams →1 packet yeast in teaspoons →1 packet yeast to tablespoons →instant to active dry yeast →active dry to instant yeast →fresh yeast to instant dry →1 teaspoon yeast in grams →2 teaspoons yeast in grams →2 and a quarter teaspoons yeast in grams →1 tablespoon yeast in grams →2 tablespoons yeast in grams →5g yeast to teaspoons →10g yeast to teaspoons →15g yeast to teaspoons →20g yeast to teaspoons →
Baking & Kitchen Cluster Cross-Links

Verified ingredient weight conversions and pan geometry calculators across our baking suite:

Butter Sticks Converter 113.4g per stick Yeast Packet Converter 7g = 2 1/4 tsp Cake Pan Size Converter Area & volume 250g Butter to Sticks 2.2 sticks (block) 7g Yeast to Teaspoons 2 1/4 tsp 8" to 9" Cake Pan 1.27x factor 9x13 Pan to Round Two 9" rounds 1 Stick Butter in Grams 1/2 cup / 8 tbsp Instant vs Active Dry 1.25x ratio 9" Round to 8" Square Exact 1:1 match
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