Cocktail: ABV by Spirit Category
TTB requires bourbon to distill at ≤80% ABV, enter barrel at ≤62.5%, and bottle at ≥40% ABV. Gin must be ≥37.5% ABV in the EU; 40% in the US. Overproof is ≥57.15% ABV (100 UK proof).
| Measure | Value | Unit | Notes |
|---|---|---|---|
| Bourbon: minimum bottling ABV | 40 | % ABV | TTB regulation; some bottled-in-bond expressions require 50% |
| Bourbon: maximum distillation proof | 80 | % ABV (160 proof) | Must distill at or below 80% ABV to retain congener character |
| Bourbon: maximum barrel entry proof | 62.5 | % ABV (125 proof) | TTB 27 CFR 5.22; higher entry proof produces lighter spirit |
| Gin: minimum US ABV | 40 | % ABV | TTB requirement; EU allows 37.5% for most gin categories |
| Vodka: minimum ABV (US) | 40 | % ABV | TTB requirement; some EU vodkas sold at 37.5% |
| Overproof rum definition | 57.15 | % ABV | 100 UK proof = 57.15% ABV (gunpowder test origin); US overproof = >50% ABV |
| Cask-strength whisky typical range | 58–66 | % ABV | Varies by barrel and aging time; no dilution added at bottling |
| Absinthe typical ABV | 45–74 | % ABV | Traditional Swiss-style absinthe 65–74%; modern bottles often 45–55% |
ABV (Alcohol By Volume) is the internationally standardized measure of ethanol concentration in a spirit. Every major spirit category has legally mandated minimum ABV floors, and some have maximum distillation or barrel-entry proofs that define their flavor character. Understanding these numbers is essential for cocktail balance — a 45% ABV gin behaves differently from a 40% ABV gin in dilution calculations and flavor intensity.
ABV Ranges by Spirit Category
| Spirit Category | Min ABV (US) | Typical Range | Distillation Max | Barrel Entry Max | Notes |
|---|---|---|---|---|---|
| Bourbon whiskey | 40% | 40–67% | 80% ABV | 62.5% ABV | Must be ≥51% corn |
| Rye whiskey | 40% | 40–60% | 80% ABV | 62.5% ABV | Must be ≥51% rye |
| Scotch whisky | 40% | 40–65% | No maximum | 63.5% ABV | ≥3yr oak aging required |
| Irish whiskey | 40% | 40–55% | 94.8% ABV | — | Triple-distilled common |
| Gin (US) | 40% | 40–58% | No maximum | — | Juniper must predominate |
| Gin (EU) | 37.5% | 37.5–50% | No maximum | — | Lower floor than US |
| Vodka (US/EU) | 40% (US) / 37.5% (EU) | 40–50% | 95%+ | — | Neutral spirit, minimal flavor |
| Rum | 40% | 40–75% | No US max | — | Wide range by country |
| Tequila | 35% (US) / 38% (Mexico) | 38–55% | 55% ABV | — | Blue agave only |
| Mezcal | 35% | 38–55% | 55% ABV | — | Multiple agave species |
| Brandy/Cognac | 40% | 40–60% | 72% ABV (Cognac) | — | Cognac strictly regulated |
| Absinthe | 45% (common) | 45–74% | — | — | No US TTB legal definition |
Overproof and Cask Strength
Overproof spirits require special handling in cocktail recipes. A float of 63% ABV overproof rum on a Zombie or Navy Grog contains 57% more alcohol per drop than a 40% ABV standard rum. This makes it useful for dramatic flavor concentration in small doses while the rest of the drink is built at standard ABV.
Cask-strength (also called barrel-proof) whiskey is bottled without dilution from the barrel at whatever ABV the spirit has reached after aging — typically 58–66% ABV depending on the original entry proof and evaporation over years. One to two teaspoons of water can drop a cask-strength whiskey from 60% to an effective 50%, releasing trapped aroma compounds in a process called “opening up.”
Related Pages
Sources
- TTB — Beverage Alcohol Manual: A Practical Reference (2007 and updates)
- EU Regulation 2019/787 — Definition, description, presentation and labelling of spirit drinks
- Distilled Spirits Council of the United States — Industry Overview
Frequently Asked Questions
What does ABV mean and how is proof calculated?
ABV (Alcohol By Volume) is the percentage of pure ethanol in a liquid by volume at 20°C. US proof is exactly 2× ABV — so 80 proof = 40% ABV, 100 proof = 50% ABV. UK proof historically was ABV × 1.75 (based on the gunpowder test at 57.15% ABV = 100°). Today, the UK has adopted the EU standard of quoting ABV directly.
Why does bourbon have a maximum distillation proof?
The TTB regulation (80% ABV maximum distillation proof for bourbon) is flavor-protective. Ethanol is a better solvent than water; at higher distillation proofs, more congeners (flavor-active compounds) are removed along with the ethanol. Limiting distillation proof forces retention of the corn, barrel, and fermentation flavors that define bourbon character. Neutral spirits are distilled at 95%+ ABV precisely because all congeners are stripped.
What is overproof and is it more dangerous?
Overproof spirits exceed 57.15% ABV (100 UK proof) or commonly 50% ABV in US usage. They deliver more alcohol per volume and are typically flammable. Overproof rum (e.g., Wray & Nephew at 63%) is used in cocktails for both flavor intensity and the float technique — its lower density allows it to sit atop lower-ABV ingredients. It is not chemically different from standard ABV spirits, just more concentrated.
What is bottled-in-bond whiskey?
Bottled-in-bond is a US legal category (Bottled-in-Bond Act of 1897) requiring: produced at a single distillery in a single distilling season, aged at least 4 years in a federally bonded warehouse, and bottled at exactly 100 proof (50% ABV). It was created as a quality guarantee when adulteration was widespread. Today it signals a specific, well-aged expression.