Dilution calculator
How much water to add to bring a spirit down to the strength you want.
Dilution
How much water to add to bring a spirit down to the strength you want.
- Water to add
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- Final volume
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- Pure alcohol (unchanged)
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Method and accuracy
Assumes ideal mixing. Ethanol and water contract slightly when combined — most strongly around 50 %ABV — so real volumes run a little lower than calculated, by up to about 2–3%. Add slightly less water than the figure shown, measure, then top up.