How this calculator works
This tool helps recover a missed gravity target by comparing current gravity, target gravity and batch volume.
When gravity is low, it estimates how much fermentable extract to add or how much longer to boil.
When gravity is high, it estimates the dilution water needed to bring the batch back toward target.
Worth knowing
- Temperature-correct your gravity sample before deciding that the batch needs adjustment.
- After adding extract or water, mix thoroughly and take a fresh reading before making another correction.