Yeast substitution calculator
Convert fresh, active-dry and instant yeast using a selected reference or manufacturer factor.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- Replacement yeast mass = × Conversion factor
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
Guidance varies: King Arthur’s professional reference uses fresh ×0.4 for active dry and ×0.33 for instant; its home reference uses ×0.33 for either dry form. Prefer your manufacturer’s factor. Custom factor means replacement grams per original gram. This does not predict rise time. Example: 30 g fresh ×0.33 = 9.9 g instant.
Sources
- King Arthur — professional yeast conversion guidance Sources reviewed: 2026-10-21
- King Arthur — fresh yeast for home baking Sources reviewed: 2026-10-21
