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Alcohol Dilution Calculator

Find water to dilute spirits to a target proof.

Calculated Output

Water to add (ml) 375

Final volume (ml) 1,125

Formula: final = V × current ÷ target ; water = final − V

Step-by-Step Breakdown

1. Values used:

2. Current ABV = 60 %

3. Current volume = 750 ml

4. Target ABV = 40 %

6. Water to add = 375ml

7. Current ABV x Current volume = 60 x 750 = 45,000

8. Final volume = (Current ABV x Current volume) / Target ABV = 45,000 / 40 = 1,125ml

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The math behind it

C₁V₁ = C₂V₂: final volume = volume × current ABV ÷ target ABV; water to add = final − current volume.

750 ml at 60% → 40%: add 375 ml water.

Use distilled water?

Yes — for clarity and taste when proofing spirits.