Spirit Dilution Calculator
Calculate how much water to add to dilute a spirit from its current ABV to a target ABV for proofing down.
Inputs
mL
%
%
Results
Water to Add
625 mL
Final Volume (theoretical)1,625 mL
Final Volume (adjusted for contraction)1,576 mL
Current Proof130°
Target Proof80°
How to Use This Calculator
- Enter the spirit volume in mL or liters.
- Set the current ABV and target bottling ABV (e.g., 40% for 80 proof).
- The calculator shows water to add in mL, theoretical and contraction-adjusted final volume, and current and target proof.
- Add the calculated water slowly while stirring, then re-measure proof to confirm before bottling.
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