Alcohol Dilution Calculator

• •Use the Alcohol Dilution Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
• •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
• •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
• •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.

The Alcohol Dilution Calculator is a free, browser-based calculation tool for engineers, students, and technical professionals. Calculate how much water to add to reduce an alcoholic liquid to a target ABV (alcohol by volume). Enter the current volume, current ABV, and desired ABV to get the exact water volume needed. Essential for home distillers, mixologists, and beverage producers. It implements standard formulas and supports both metric (SI) and imperial unit systems with automatic unit conversion. All calculations are performed instantly in your browser with no data sent to a server. Use this calculator as a quick reference and sanity-check tool during design, analysis, and learning. Always verify results against primary engineering references and applicable standards for any safety-critical application.

The Alcohol Dilution Calculator determines the exact amount of water needed to reduce an alcoholic beverage from its current strength to a target ABV (alcohol by volume). This is a fundamental calculation for home distillers who need to bring high-proof distillate down to bottling strength, bartenders preparing batched cocktails, and beverage producers standardizing product strength. The tool uses the simple dilution formula based on the conservation of pure alcohol volume, ensuring that the final product contains the intended alcohol concentration.

• !Adding water too quickly to high-proof spirits. This can cause louching (cloudiness) from essential oil precipitation. Add water gradually and stir continuously for clearest results.
• !Measuring ABV immediately after mixing. The exothermic reaction warms the liquid, affecting density readings. Wait until the mixture returns to room temperature before measuring proof.
• !Using tap water for dilution. Minerals in tap water can cause haze and off-flavors. Use distilled, reverse-osmosis, or very soft filtered water for best results.