Calculating your cocktail ABV is straightforward once you know the Cocktail ABV formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Cocktail ABV Calculator.
What is Cocktail ABV?
The Cocktail ABV calculation tells you your cocktail ABV from a few simple inputs. The figure you are solving for here is the cocktail ABV, expressed in percent.
The Cocktail ABV formula
The core formula is:
Cocktail ABV = Spirit volume × Spirit ABV ÷ Total drink volumeHere is what each input means:
- Spirit volume — a value measured in ml. Example: 50 ml.
- Spirit ABV — a percentage, such as an annual rate. Example: 4%.
- Total drink volume — a value measured in ml. Example: 200 ml.
How to calculate it step by step
- Write down the spirit volume (for example, 50 ml).
- Write down the spirit abv (for example, 4%).
- Write down the total drink volume (for example, 200 ml).
- Apply the formula above to get your cocktail ABV.
- Double-check the result with the Cocktail ABV Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Spirit volume | 50 ml |
| Spirit ABV | 4% |
| Total drink volume | 200 ml |
| Cocktail ABV | 10.0% |
With spirit volume of 50 ml, spirit abv of 4% and total drink volume of 200 ml, the cocktail ABV works out to 10.0%.
Example 2
With spirit volume of 100 ml, spirit abv of 4% and total drink volume of 200 ml, the cocktail ABV works out to 20.0%.
| Result | Value |
|---|---|
| Cocktail ABV | 20.0% |
Example 3
With spirit volume of 25 ml, spirit abv of 4% and total drink volume of 200 ml, the cocktail ABV works out to 5.0%.
| Result | Value |
|---|---|
| Cocktail ABV | 5.0% |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Cocktail ABV Calculator does it instantly, for free, with the formula and a worked example built in.
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