Most gin is 40% alcohol by volume (80 proof), so a 1.5 oz shot holds about 0.6 oz of pure alcohol.
If you’ve ever poured gin at home, ordered a martini, or checked a bottle label and felt unsure, you’re not alone. Gin comes in a wide range of strengths, and the numbers on the label can feel abstract until you turn them into “how much is in my glass?”
So when you ask, how much alcohol is in gin?, read the ABV first, measure your pour, and the rest becomes easy.
This guide turns gin’s alcohol percent into real pours. You’ll learn how to read ABV and proof, how to estimate pure alcohol in a shot or cocktail, and how to spot strength traps like “navy strength” bottles.
How Much Alcohol Is in Gin?
In most countries, gin’s strength is shown as ABV, short for alcohol by volume. ABV is the percent of the liquid that is ethanol. A bottle labeled 40% ABV is 40% ethanol and 60% water and flavor compounds.
Many bottles also show “proof.” In the United States, proof is twice the ABV. So 40% ABV equals 80 proof, 47% ABV equals 94 proof, and 57% ABV equals 114 proof.
Most standard gins sit near 40–47% ABV. Some run lower (often 37.5–39.9% ABV in markets where that is allowed). Some run higher, especially “navy strength” and other high-proof styles.
| Gin Type Or Label | Typical ABV Range | What It Means In A Glass |
|---|---|---|
| Standard London dry or dry gin | 40–47% | Most recipes assume this range for a balanced drink. |
| Lower-strength gin (where sold) | 37.5–39.9% | Same pour size, less ethanol; cocktails taste lighter. |
| Contemporary gin (citrus, floral, etc.) | 40–45% | Botanical profile changes, strength often stays similar. |
| Navy strength | 55–57% | One pour carries more alcohol; adjust size or dilution. |
| Old Tom style | 40–47% | Sweetness may mask heat; strength is often standard. |
| Sloe gin (liqueur-style) | 20–30% | Less alcohol than gin; treat it like a liqueur in math. |
| Barrel-rested gin | 42–50% | Often served like spirits; check the label before pouring. |
| Ready-to-drink gin cocktails | 4–12% | Strength varies by can; serving size drives the total. |
Alcohol content in gin by proof and ABV
The fastest way to answer the question is to convert the label into “pure alcohol.” You only need two pieces of info: the ABV on the bottle and the size of your pour.
ABV and proof in plain terms
- ABV: percent of the drink that is ethanol.
- US proof: ABV × 2.
- Pure alcohol in ounces: pour size (oz) × ABV (as a decimal).
So, if your gin is 40% ABV, you write that as 0.40 in the math. If it’s 57% ABV, you write 0.57.
How much pure alcohol is in common pours
Here are a few quick conversions that match how people pour at home and how bars often measure spirits:
- 1 oz of 40% gin: 0.40 oz ethanol.
- 1.5 oz of 40% gin: 0.60 oz ethanol.
- 2 oz of 47% gin: 0.94 oz ethanol.
- 1.5 oz of 57% gin: 0.86 oz ethanol.
That last line is the one that surprises people. Navy strength gin looks like “just gin,” but the same 1.5 oz pour carries roughly 40% more ethanol than a 40% bottle.
Strength shifts after shaking, stirring, or topping
Spirit strength is one thing; cocktail strength is another. Once you add ice and mix, water joins the party. A stirred drink like a martini usually picks up more dilution than most people guess. A tall drink like a gin and tonic may start with the same shot, yet the finished drink’s percent drops because the total liquid is larger.
This is why the label answers “how much alcohol is in gin?”, while your recipe answers “how strong is my drink.” Both can be true at once.
Standard drinks and units for gin
If you want a common yardstick, use standard drink math. In the US, one standard drink holds 0.6 oz of pure alcohol. The National Institute on Alcohol Abuse and Alcoholism lays out the sizes in its standard drink chart.
In the UK, alcohol is often tracked in “units.” One unit is 10 mL (8 g) of pure alcohol. The UK’s National Health Service explains this on its alcohol units guide.
US standard drink math for a gin pour
To estimate standard drinks in gin, divide the pure alcohol by 0.6 oz.
- 1.5 oz of 40% gin: 0.60 oz ethanol → 1 standard drink.
- 2 oz of 40% gin: 0.80 oz ethanol → 1.33 standard drinks.
- 1.5 oz of 47% gin: 0.71 oz ethanol → 1.18 standard drinks.
This math helps when a drink looks small but carries a lot. A “double” at home can quietly stack up to two or more standard drinks, depending on your bottle.
UK units math for a gin pour
To estimate units, convert to milliliters of ethanol: pour (mL) × ABV. A 25 mL pour of 40% gin contains 10 mL ethanol, which equals 1 unit. A 50 mL pour at the same strength is 2 units.
If your label shows percent and your jigger shows mL, the units math is fast. If you pour in ounces, 1 oz is roughly 29.6 mL.
What changes the alcohol you end up drinking
Two people can order “gin and tonic” and walk away with different alcohol totals. These are the levers that move the number.
Pour size and bar standards
In the US, a common bar pour is 1.5 oz, but it can be 1.25 oz, 2 oz, or a measured “count” that varies by venue. At home, free-pours tend to creep upward. A small measuring cup or jigger keeps your math honest.
Gin strength on the label
Two bottles can sit side by side and look similar, yet one reads 40% and the other 46% or 57%. That gap changes the pure alcohol in each drink you make from it.
Ice melt and mixing time
Shaking can add more water than stirring, and a long shake adds more than a short one. Warm ice melts faster than cold, and wet ice melts faster than dry. More melt lowers the percent in the glass, yet the total ethanol you poured stays the same.
Mixer volume
A tall drink spreads the same ethanol through more liquid. That makes the drink taste less “hot,” but the alcohol total is still tied to the shot you poured.
Practical strength ranges for common gin drinks
These ranges use typical home recipes and normal ice dilution. Your glassware, ice, and pour size can move the number, so treat these as ballpark checkpoints, not lab readings.
Gin served neat or on ice
Neat gin is close to the bottle strength. On ice, the first sips start near the label ABV, then slide downward as ice melts.
Martini-style drinks
A classic martini build (gin plus dry vermouth) often lands in the mid-20% to low-30% ABV range after stirring and straining. Use more vermouth or a smaller gin pour if you want a softer drink without changing the vibe.
Gin and tonic
With a 1.5 oz gin pour and 4–6 oz tonic, the finished drink often lands near 10–14% ABV. The percent drops as you add more tonic, yet the standard drinks stay tied to the gin shot.
Negroni and other equal-parts builds
Equal-parts drinks like a Negroni can feel smooth, yet the alcohol adds up because all parts contain ethanol. After stirring and dilution, many land near 20–25% ABV.
| Pour Size Of 40% Gin | Pure Alcohol (Oz) | US Standard Drinks |
|---|---|---|
| 0.75 oz | 0.30 | 0.50 |
| 1 oz | 0.40 | 0.67 |
| 1.5 oz | 0.60 | 1.00 |
| 2 oz | 0.80 | 1.33 |
| 2.5 oz | 1.00 | 1.67 |
| 3 oz | 1.20 | 2.00 |
| 4 oz | 1.60 | 2.67 |
| 5 oz | 2.00 | 3.33 |
Label traps that change the math
Some label words sound like they describe strength, but they don’t. Others still do.
London dry is a style, not a strength tag
“London dry” refers to production rules and flavor style. It does not lock the bottle into a single ABV. Always read the percent line.
Navy strength is usually 57% ABV
Many navy strength gins sit near 57% ABV. A standard shot from these bottles carries more ethanol than a standard shot from a 40% bottle, so measure with care when mixing.
Sloe gin is often a liqueur
Sloe gin often lands in the 20–30% ABV range. It can be sweet and easy to sip, so the lower percent can hide a larger serving. Treat it like a liqueur in your pour math.
Mini bottles and “double” pours
A 50 mL mini bottle is roughly 1.7 oz. At 40% ABV, that is close to 1.13 US standard drinks. If you pour two minis, you’re past two standard drinks.
Pacing tips for safer drinking
Gin’s strength makes it easy to underestimate what’s in a small glass. A few habits keep things steady:
- Measure your first pour so your “normal” is real.
- Space drinks with water or food, and slow down when you switch to higher-ABV bottles.
- If you drive, skip alcohol. If you feel impaired, don’t get behind the wheel.
- If you take medication, are pregnant, or have a health condition, talk with a clinician about alcohol.
Recap
- Most gin is 40–47% ABV, and US proof is ABV × 2.
- Pure alcohol equals pour size × ABV (as a decimal).
- A 1.5 oz pour of 40% gin is 0.60 oz ethanol, which matches one US standard drink.
- High-proof gin, larger pours, and spirit-heavy cocktails raise the total fast.