FOOD & COOKING CALCULATOR
Alcohol Dilution
A precise tool.
What is the Alcohol Dilution & How does it work?
Diluting a high‑proof spirit is a matter of preserving the total amount of pure ethanol while increasing the overall liquid volume. By adding water, the alcohol‑by‑volume (ABV) percentage drops proportionally, allowing you to achieve a desired strength for cocktails, cooking, or safe consumption. The relationship between the initial spirit, its ABV, and the target ABV is linear. Because ethanol does not disappear during dilution, the product of volume and ABV remains constant. This principle lets you calculate exactly how much water to add without guesswork. Understanding the math also helps avoid over‑dilution, which can flatten flavors, and under‑dilution, which may result in an overly strong final drink. Use the formula below to determine the final total volume needed for any desired ABV.
V_{final} = V_{initial} \times \frac{ABV_{initial}}{ABV_{target}}
V_{final} = final total volume (ml)
V_{initial} = initial spirit volume (ml)
ABV_{initial} = initial alcohol‑by‑volume (%)
ABV_{target} = desired alcohol‑by‑volume (%)
V_{initial} = initial spirit volume (ml)
ABV_{initial} = initial alcohol‑by‑volume (%)
ABV_{target} = desired alcohol‑by‑volume (%)
Parameters
Result
—
Frequently Asked Questions
How do I dilute alcohol to a lower ABV?
Multiply the initial volume by its ABV, then divide by the target ABV. The result is the final volume needed after adding water.
What happens to the amount of pure ethanol when you dilute alcohol?
The amount of pure ethanol remains constant; only the total liquid volume increases.
Can I use this calculator for cooking with spirits?
Yes, it helps adjust the ABV of spirits to suitable levels for recipes.
How do I make a 50% ABV spirit weaker to 40% ABV?
Use the formula: (initial volume * initial ABV) / target ABV = final volume. Subtract the initial volume from the final volume to get the water needed.
Is it safe to drink alcohol that has been diluted with water?
Yes, diluting alcohol can make it safer for consumption by reducing its potency.
What is the relationship between ABV and volume during dilution?
The product of volume and ABV remains constant; adding water decreases ABV while increasing volume proportionally.
Can I use this calculator for making cocktails with different alcohol strengths?
Absolutely, it helps in achieving the desired strength for your cocktail recipes.
Results are for informational purposes only and do not constitute professional advice.