Alcohol Dilution Calculator
Find how much water to add to dilute a spirit to a target proof. This free online cooking & kitchen calculator runs entirely in your browser — no signup, no data sent anywhere.
Inputs
Results
How It Works (Formula & Method)
Alcohol content is conserved when you add water, so C₁V₁ = C₂V₂. The final volume is current ABV × current volume ÷ target ABV, and the water to add is the difference. This ignores the slight volume contraction when alcohol and water mix.
Worked Example
Below is a worked example using the calculator's default values. The same numbers are pre-filled in the form above so you can press Calculate and see the result without typing anything.
Inputs used:
- Current ABV (%): 60
- Current Volume (ml): 750
- Target ABV (%): 40
With these inputs, the calculator computes the metrics shown in the Results panel. Change any value and press Calculate again to see how the result responds — the live widget and the chart both update instantly.
Frequently Asked Questions
What does the Alcohol Dilution Calculator compute?
The Alcohol Dilution Calculator takes 3 input values and returns 2 results. Calculate how much water to add to dilute a spirit from its current ABV to a target ABV, using the dilution formula C₁V₁ = C₂V₂.
Is my data sent to a server?
No. The Alcohol Dilution Calculator runs entirely in your browser using static JavaScript. Your inputs are never transmitted to CalculatorHive or any third party, and nothing is stored after you close the page.
Is this calculator free to use?
Yes. Every calculator on CalculatorHive is completely free. There is no signup, no paywall, and no usage limit. The site is supported by display advertising and affiliate partnerships, which are clearly labeled.
How accurate is the result?
The math is mathematically exact for the inputs you provide. Real-world accuracy depends on how accurately your inputs reflect the real situation — defaults are typical values, not guarantees.