How Many Milliliters Is One Shot? | The Pour Size That Counts

One standard U.S. shot is 44.36 mL, and many bars round that single pour to 44 mL or 45 mL.

A shot sounds simple until you try to pin down the number. One friend says 30 mL. Another swears it’s 50 mL. Then a recipe calls for 1.5 ounces, and now you’re doing math with a jigger in one hand and your phone in the other.

Here’s the clean answer: in the United States, one standard shot is 1.5 fluid ounces. Using the official U.S. fluid ounce conversion, that equals 44.36 milliliters. In everyday use, people round that to 44 mL or 45 mL. That’s the figure most readers want, and it’s the one that clears up the confusion fastest.

Still, that’s not the whole story. Shot size changes by country, by bar, and by context. A “shot” in a cocktail recipe, a shot sold in a pub, and a standard drink used in alcohol guidance are close cousins, not always twins. That gap is where people get tripped up.

How Many Milliliters Is One Shot In The U.S.?

In the U.S., the classic answer is 44.36 mL because a standard shot is 1.5 U.S. fluid ounces. The National Institute on Alcohol Abuse and Alcoholism uses that 1.5-ounce pour as the distilled spirits example for a standard drink, and the standard drink definition from NIAAA is the cleanest official reference for that serving size.

If you want the plain-English version, use this:

• 1 shot in the U.S. = 1.5 fl oz
• 1 U.S. fl oz = 29.57 mL
• 1 shot = 44.36 mL

Most people won’t measure a pour to the second decimal place. That’s why recipes, bartenders, and product labels often round it to 44 mL or 45 mL. All three figures point to the same real-world serving size.

Why The Number Changes From One Place To Another

The word “shot” is loose. It’s common, familiar, and handy, but it’s not a single worldwide legal size. Some places use 25 mL. Some use 30 mL. Some use 35 mL. Some use 50 mL. In the U.S., bars often treat 1.5 ounces as the house standard, yet measured pours can still vary if the drink is free-poured, overpoured, or built for a stronger cocktail.

That’s why “shot” and “standard drink” shouldn’t be mashed together without context. A standard drink is a measurement tied to alcohol content. A shot is a serving term. When the spirit is 40% ABV, those two line up neatly in the U.S. At other strengths, they can drift apart.

Shot Size Vs. Standard Drink

A single shot of 80-proof liquor matches one U.S. standard drink because 80 proof means 40% alcohol by volume, and 1.5 ounces of that spirit contains the amount of pure alcohol used in U.S. public health guidance. The CDC uses that same serving in its standard drink sizes chart.

Swap in a stronger spirit, and the serving may still look like one shot, but the alcohol inside that glass climbs. That matters for recipes, pacing, and drink counting.

Where 44.36 Milliliters Comes From

The math is plain once you know the conversion factor. The U.S. National Institute of Standards and Technology lists 1 U.S. fluid ounce as 29.57 milliliters in its fluid ounce to milliliter conversion table. Multiply 29.57 by 1.5, and you get 44.355. Rounded to two decimals, that’s 44.36 mL.

That’s the number behind recipe cards, jiggers marked in ounces, and many bartending references built around U.S. pours. It also explains why some bottles, measuring tools, and cocktail books jump between ounces and milliliters without matching perfectly at first glance. They’re rounding for speed.

Common Shot Measurements You’ll See

Even when the U.S. answer is the one you need, it helps to know the other sizes floating around. This saves you from using the wrong side of a jigger or misreading a recipe written for a different market.

Shot Measure	Milliliters	Where You’ll See It
1 U.S. standard shot	44.36 mL	U.S. bars, U.S. recipes, standard drink references
Rounded U.S. shot	44–45 mL	Jiggers, recipe apps, home bartending notes
Single metric pour	30 mL	Metric jiggers, some cocktail books, home bars
Small pub measure	25 mL	Common in parts of Europe and the UK
Larger pub measure	35 mL	Used in some licensed venues
Large single pour	50 mL	Seen in some countries as a standard serving
Half shot	22 mL	Split pours, layered shooters, tasting pours
Double U.S. shot	88.72 mL	Double pours, strong mixed drinks, recipe scaling

That table clears up one big snag: “one shot” is not a universal metric amount. If you’re reading a recipe from the U.S., 44 mL to 45 mL is the safe reading. If the recipe is written in a metric style and uses a jigger marked 30/60, the writer may be treating 30 mL as the base shot measure.

What Bartenders Mean By A Shot, A Jigger, And A Pour

These words often get tossed around like they mean the same thing. Close, yes. Identical, not always.

Shot

A shot is the serving itself. It can mean a straight pour served on its own, or the amount of liquor added to a mixed drink.

Jigger

A jigger is the measuring tool. Many double-sided jiggers include ounce and milliliter markings. One side may hold 1.5 ounces, while the other side may hold 0.75 or 1 ounce. Metric jiggers often use 30 mL and 60 mL.

Pour

A pour is what lands in the glass. In a careful bar, that pour is measured. In a casual setting, it may be free-poured, and the result can drift above or below the listed shot size.

That’s why a home drink made with a “good splash” can hit harder than expected. The label on the bottle didn’t change. The pour did.

When You Should Use 44 mL, 45 mL, Or 50 mL

This part saves time. Pick the number that fits the task in front of you.

• Use 44.36 mL when you want the exact U.S. conversion from 1.5 fluid ounces.
• Use 44 mL or 45 mL when you’re cooking, mixing drinks at home, or reading most U.S. recipes.
• Use 50 mL only when the recipe, venue, or bottle labeling is clearly working with that measure.

If you’re buying bar tools, this is where many people make the smart move: get a jigger with both ounce and milliliter markings. That cuts out the guesswork and makes recipes from different countries much easier to follow.

If You’re Doing This	Best Shot Figure To Use	Why It Fits
Reading a U.S. cocktail recipe	44–45 mL	Matches the usual 1.5 oz base pour
Writing a technical conversion	44.36 mL	Reflects the direct ounce-to-mL math
Using a metric jigger	30 mL or 50 mL	Depends on the tool’s marked side
Tracking standard drinks	44.36 mL at 40% ABV	Matches the U.S. spirits standard drink serving

How To Convert Shots To Milliliters Fast

You don’t need a calculator every time. These quick checks handle most situations:

• 1 shot = 44.36 mL
• 2 shots = 88.72 mL
• 3 shots = 133.08 mL
• Half a shot = 22.18 mL

If you’re rounding for a home recipe, this is plenty:

• 1 shot ≈ 45 mL
• 2 shots ≈ 90 mL
• Half a shot ≈ 22 mL

That rounded version is easier to work with when you’re mixing drinks, scaling batches, or filling a measuring cup. It’s close enough for taste and far easier to remember.

Why Recipes And Labels Can Still Look Inconsistent

Some recipes are written by bartenders trained in ounces. Others are written for metric tools. Some bottle labels list volume in milliliters, while the recipe book sitting next to the bottle talks in ounces and fractions. No wonder people pause halfway through making a drink.

The trick is to find the writer’s base system. If the recipe starts with ounces, one shot usually means 1.5 ounces. If it uses 30 mL and 60 mL throughout, it may be treating 30 mL as the standard single pour. Once you spot that pattern, the rest of the recipe usually falls into place.

One Clear Answer To Keep

If you want one number to store in your head, make it this: one U.S. shot is 44.36 milliliters, usually rounded to 44 mL or 45 mL. That’s the most useful answer for cocktail recipes, bar tools, and standard U.S. drink references.

If you run into 25 mL, 30 mL, or 50 mL, don’t assume the source is wrong. It may just be using a different local serving rule. The safest move is to read the recipe or menu in context, then match your measuring tool to that system.