Brewing tool
Refractometer Correction
Correct a refractometer reading after fermentation has started.
Guide
Before you start
Refractometers are great on brew day. After fermentation starts, alcohol throws the reading off, so it needs correcting.
Calculator
Enter your values
Method
How this is estimated
A refractometer reads sugar well before fermentation. Once alcohol is present, the reading needs correcting. This estimate uses the original reading, the final Brix, and your wort correction factor.
Safety and limits
A few notes
This gets you close, but it is still an estimate. If the number really matters, check it with a hydrometer.
Use accurate measurements for the best estimate.