Calculating your instant yeast is straightforward once you know the Yeast Conversion formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Yeast Conversion Calculator.
What is Yeast Conversion?
The Yeast Conversion calculation tells you your instant yeast from a few simple inputs. The figure you are solving for here is the instant yeast.
The Yeast Conversion formula
The core formula is:
Instant yeast = Active dry yeast × 0.75Here is what each input means:
- Active dry yeast — a value measured in g. Example: 10 g.
How to calculate it step by step
- Write down the active dry yeast (for example, 10 g).
- Apply the formula above to get your instant yeast.
- Double-check the result with the Yeast Conversion Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Active dry yeast | 10 g |
| Instant yeast | 7.50 |
| Fresh yeast | 30.00 |
With active dry yeast of 10 g, the instant yeast works out to 7.50.
Example 2
With active dry yeast of 20 g, the instant yeast works out to 15.00.
| Result | Value |
|---|---|
| Instant yeast | 15.00 |
| Fresh yeast | 60.00 |
Example 3
With active dry yeast of 5 g, the instant yeast works out to 3.75.
| Result | Value |
|---|---|
| Instant yeast | 3.75 |
| Fresh yeast | 15.00 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Yeast Conversion Calculator does it instantly, for free, with the formula and a worked example built in.
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