Winemaking
Dilution and Fortification Calculator
Estimate volume additions to hit a target ABV by water dilution or fortifier blending.
Planning volume and alcohol changes
Use this calculator when a cellar adjustment changes both volume and alcohol. It helps estimate the impact of adding water, spirit, or another component before you make a physical change to the batch.
- Check legal limits and product definitions before making any fortification or dilution.
- Record the starting volume, starting ABV, addition volume, and addition ABV together.
- Treat the result as a planning estimate and verify with analysis where precision matters.
How It Works
This calculator estimates volume additions for ABV reduction or fortification.
- Choose dilution or fortification mode.
- Enter current volume, current ABV, target ABV, and fortifier ABV if applicable.
- Review required addition volume and resulting final volume/ABV.
FAQ
When is fortification impossible?
If fortifier ABV is at or below target ABV, the target cannot be reached by addition.
What does dilution mode assume?
It assumes added water contributes volume without alcohol content.
Should I add in one step?
Use staged additions and re-check ABV to minimize overshoot.