Spirit Blending Calculator — Blend Two Spirits
Calculate the resulting ABV and proof when blending two spirits of different strengths. Enter the ABV and volume of each spirit to find the blended result. Supports oz and mL.
How to use it
- Select your volume unit: oz or mL.
- Enter the ABV percentage and volume of Spirit 1.
- Enter the ABV percentage and volume of Spirit 2.
- Read the blended ABV, proof, and total volume.
Why Blend Spirits?
Blending is a fundamental technique in whiskey, rum, and brandy production. Master blenders combine barrels of different ages and flavor profiles to create a consistent house style.
Volume Contraction in Blending
When mixing two alcohol solutions, the actual volume is slightly less than the arithmetic sum due to alcohol-water molecular interactions. For home blending, this difference is typically less than 1%.
The formula
Frequently asked questions
How do I blend two whiskeys to a target ABV?
Use the weighted average formula: Target ABV = (ABV₁ × V₁ + ABV₂ × V₂) ÷ (V₁ + V₂).
Can I blend high-proof and low-proof spirits?
Yes — blending is how most commercial spirits are made. A high-proof distillate is blended with water or a lower-proof spirit to reach the desired bottling proof.
Does blending affect flavor?
Yes — blending is an art. Different barrel ages, grain bills, and distillation methods contribute different flavor compounds.
What is vatting in whisky?
Vatting (or mingling) is the Scotch whisky term for blending multiple single malt whiskies together.