Alcohol Dilution Calculator
Quickly calculate how much water to add when diluting spirits to reduce alcohol content from one ABV to another.
How Alcohol Dilution Calculator Works
This calculator helps you determine precisely how much water to add when diluting spirits or other alcoholic beverages. Whether you're a home distiller bringing down a high-proof spirit or adjusting store-bought alcohol for cocktails, getting the right dilution is crucial for achieving your target ABV.
The calculation takes into account the volume of your original spirit, its current alcohol content, and your desired final strength. It then computes both the final volume you'll end up with and the exact amount of water needed to reach that target.
The calculator includes validation to ensure your target ABV is lower than your current ABV – you can't increase alcohol content by adding water. It's designed to work with any units of measurement (ml, oz, liters) as long as you're consistent throughout.
Alcohol Dilution Calculator Formula Breakdown
Formula
Final volume = (Current ABV ÷ Target ABV) × Initial volume
Water to add = Final volume - Initial volumeVariables Explained
- Current ABVThe alcohol by volume percentage of your spirit before dilution. This is typically found on the bottle label or measured with an alcoholmeter if you've distilled it yourself.
- Target ABVThe desired alcohol by volume percentage you want to achieve after dilution. This must be lower than the current ABV for the calculation to work.
- Initial volumeThe amount of high-proof spirit you're starting with. Can be measured in any unit (ml, oz, liters) as long as you use the same unit throughout the calculation.
Example Calculation
Given:
- Current ABV: 67.00%
- Target ABV: 45.00%
- Initial volume: 500.00 ml/oz
Calculation:
Final volume = (67.00% ÷ 45.00%) × 500.00 ml/oz
Final volume = 1.4889 × 500.00 = 744.44 ml/oz
Water to add = 744.44 - 500.00 = 244.44 ml/ozResult:
244.44 ml/ozExplanation
This example shows diluting 500ml of 67% ABV spirit (like a high-proof whiskey straight from the still) down to 45% ABV for bottling. You'd need to add about 244ml of water to achieve this dilution.
Tips for Using Alcohol Dilution Calculator
- 💡Always use distilled or filtered water to avoid introducing minerals that can cause cloudiness or off-flavors in your diluted spirit.
- 💡Add water slowly and mix gently to prevent heat buildup, which can create unwanted flavors and affect your measurements.
- 💡When diluting spirits with oils (like gin or brandy), consider diluting in stages over several days to prevent cloudiness from oils falling out of solution.
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