Fermento Biol/Quim

1 g biol = 3 g químico.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

g químico
30,0

About this calculator

This calculator allows for the comparison of the amounts of biological and chemical yeast needed in baking recipes. Biological yeast, also known as fresh yeast, is a natural fermenting agent that contains live yeast. Chemical yeast, or baking powder, is a synthetic fermenting agent that releases carbon dioxide when it comes into contact with hot liquids. The commonly used ratio is 1g of biological yeast to 3g of chemical yeast.

The calculator uses a simple formula to convert between the two types of yeast. It is based on the 1:3 ratio, meaning that for every gram of biological yeast, three grams of chemical yeast are needed. This is useful for recipes that specify one type of yeast but you have the other on hand.

When to use this calculator? Mainly when adapting bread, cake, and other baking product recipes that use yeast. It is also useful for those who prefer one type of yeast and need to convert quantities to achieve the same effect in the recipe. However, it is essential to be aware of the storage conditions and shelf life of each type of yeast, as this can affect the efficiency of fermentation.

It is essential to remember that fermentation efficiency also depends on other factors such as temperature, rising time, and type of flour used. Therefore, it may be necessary to adjust yeast and other ingredient quantities to achieve the desired result in different recipes.

Frequently asked questions

Can I use this calculator for any type of recipe?

The calculator is designed for baking recipes like bread, cakes, and dough that use yeast. For other types of recipes, the ratio may not be valid.

Is the ratio of 1g biological yeast to 3g chemical yeast always true?

Generally, yes. However, efficiency may vary depending on the brand and type of yeast, as well as storage conditions.

How does temperature affect fermentation?

The ideal temperature for fermentation ranges between 20°C and 30°C. Extreme temperatures can affect yeast activity and efficiency.

Can I substitute biological yeast for chemical yeast in recipes that use natural yeast?

Yes, but it's essential to consider the ratio and adjust other ingredients and fermentation time as needed.

Does the calculator work for pizza dough recipes?

Yes, the calculator can be used for pizza dough recipes that use yeast, helping to convert between biological and chemical yeast.

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