How Many Milliliters Are In One Shot Glass? | Bar Math Made Easy

Ask ten bartenders about the volume of a single pour and you’ll hear a range. That’s because “shot” is a serving style, not a universal legal unit. Bars follow local rules or house standards. The quick answer for most menus in North America is 44 milliliters. In many other places the glass is closer to 25–35 milliliters. Below you’ll find the exact numbers that matter, plus simple conversions you can trust at home or behind the stick.

How Many Ml In A Shot? Practical Ranges And Why They Differ

There isn’t one global rule for a shot. Countries set serving sizes for spirits in different ways, and some leave it to venues. That’s why a tequila pour in Los Angeles won’t match a gin measure in London or Sydney. Still, common ranges show up again and again, and knowing them helps you plan recipes, portion costs, and drink strength.

Typical Single-Pour Ranges

Here are the volumes you’ll see most often. The wide band reflects local law and custom.

Country/Region	Common Single Pour (mL)	Notes
United States	44 mL	Matches the 1.5 oz “standard drink” measure used by health agencies.
Canada	44 mL	Bars pour 1.5 oz as the go-to single.
United Kingdom	25–35 mL	Venues must pick one size and display it.
Australia	30 mL	Called a “nip” on menus; aligns with one local standard drink for 40% ABV.
European Union (varies)	20–40 mL	Ranges shift by country and venue.
Japan	30 mL	Common house measure for base spirits.
Germany	20–40 mL	Small schnapps glasses are common in some regions.

What The U.S. Number Means For Real Drinks

In American bars, recipes assume 1.5 ounces of 40% ABV liquor in a straight shot or a base pour. That equals 44.36 mL. It’s also the health “standard drink” used in education materials. If your barware says “1 oz / 1½ oz,” the larger side of the jigger is the single pour that matches most recipes.

What The U.K. Rule Requires

Licensed premises must serve gin, rum, vodka, and whisky in fixed quantities. The allowed sizes are 25 mL or 35 mL, and venues must stick with the chosen size across the site. That’s why menus list “25 mL measures” or “35 mL measures” in small print.

Conversions You’ll Use Every Day

Whether you’re scaling a cocktail or eyeballing a pour in the kitchen, these quick conversions save time. They also help you swap between bar gear when a marked jigger isn’t around.

Ounces To Milliliters

Memorize one anchor and the rest falls into place: 1 US fluid ounce equals 29.5735 milliliters. From there, 1.5 oz lands at 44.36 mL. A smaller 1 oz shot lands at 29.57 mL. Knowing those two numbers covers nearly every pour you’ll meet.

Tablespoons And Teaspoons

No jigger? A kitchen spoon works in a pinch. Three level US tablespoons match a 1.5 oz pour, since one tablespoon equals 14.79 mL. If you only have teaspoons, nine level teaspoons also reach the 44 mL mark. When accuracy matters, flatten the spoon with a knife edge to avoid heaping.

Metric Jiggers And Bar Spoons

Metric jiggers often show 20, 30, and 45 mL marks. A bar spoon typically holds about 5 mL. That means nine bar-spoon pours stack up to a full 45 mL single, while six hit a 30 mL pour used in many non-US bars.

Why Shot Size Affects Flavor, Cost, And Safety

Shot volume isn’t just trivia. It changes how a drink tastes, how much it costs to pour, and how much alcohol a guest takes in. One extra tablespoon shifts balance in a sour, weakens a stirred classic, and raises ABV in the glass. The math below shows how small changes add up.

Recipe Balance

Cocktails are ratios. A Daiquiri built 2:1:1 with 44 mL rum, 22 mL lime, and 22 mL syrup tastes tight and bright. Swap the 44 mL for 30 mL without adjusting the rest and the drink leans too sweet and too tart. Keep the ratio intact when your base pour changes.

Pour Cost And Inventory

A house pour that’s 30 mL stretches a bottle further than a 44 mL pour. Over a case of 12 bottles, the difference is dozens of extra serves. Set your recipes, jiggers, and staff training around one size to keep costs steady and drinks consistent.

Alcohol Intake

Public-health guidance defines a standard drink so people can track intake. In the U.S., a standard drink of spirits is 1.5 oz of 40% ABV liquor, which maps to about 44 mL. In Australia, one standard drink equals 10 g of pure alcohol, and a 30 mL nip of 40% spirit counts as one. Knowing how big the glass is helps you read any guideline chart with clarity.

Country Rules And Sources You Can Trust

Health agencies and regulators publish the numbers used by bars and training programs. If you need a reference for menus, staff handbooks, or a compliance poster, start here:

• United States: the federal health pages define a standard drink of spirits as 1.5 oz at 40% ABV, equal to about 44 mL. See the CDC standard drink page.
• United Kingdom: licensed venues must sell gin, rum, vodka, and whisky in 25 mL or 35 mL measures and display the chosen size. See the UK specified quantities rules.

Home Measuring: Fast Methods That Stay Accurate

If you’re batching or testing at home, you need repeatable measures. These quick methods keep your volumes steady without pro tools.

Use A Marked Jigger

Buy a two-sided jigger with clear interior lines at 15, 22, 30, and 45 mL. That lets you hit most recipes dead on. Stainless designs with etched marks last longer than painted ones. Rinse between different spirits to keep flavors clean.

Measure With A Syringe Or Medicine Cup

Pharmacy cups and oral syringes are cheap and precise. A 30 mL syringe makes it easy to pull a 30 mL pour twice for a 60 mL double. For a 44 mL pour, draw 30 mL plus 14 mL. The markings make calibration painless.

Calibrate Your Bar Spoon

Not all spoons match the common 5 mL size. Fill yours with water and transfer to a measuring cylinder to check the true volume. Write the number on a piece of tape on the handle so you never guess again.

When Recipes Call For “One Shot”

Old books and many online recipes say “one shot” without the volume. Treat those as regional. If the source is American, use 1.5 oz. If the source is U.K., use 25 or 35 mL depending on the style of bar you want to emulate. For Australian sources, use 30 mL. When in doubt, look for a jigger size mentioned elsewhere in the text or in the photo and match it.

Second Table: Everyday Measures At A Glance

Pin this chart near your station. It keeps conversions in sight during a rush.

Measure	Ounces (US fl oz)	Milliliters (mL)
Small Shot	1.0	29.57
Standard U.S. Pour	1.5	44.36
UK Single	0.85–1.18	25–35
Australian Nip	1.01	30
Double (Many Bars)	2.0–3.0	60–90
Tablespoon	0.5	14.79
Bar Spoon	0.17	5

Practical Scenarios And Quick Math

Scaling A Sour

If a recipe calls for 44 mL base spirit, 22 mL citrus, and 22 mL syrup, but your venue pours 30 mL singles, scale the recipe by 30/44. That gives 15 mL citrus and 15 mL syrup. The flavor balance holds and costs stay aligned with your pour policy.

Batching For Service

Building a two-liter batch with a 44 mL base? Two liters is 2,000 mL. Divide by 44 to get about 45 base pours. If your spec uses two base pours per drink, plan for roughly 22 finished serves. Add a small buffer for spillage and tasting.

Reading A Menu From Abroad

Traveling bartenders and curious guests often meet measures listed as “25 mL,” “35 mL,” or “30 mL nip.” Now you know exactly how those compare. Adjust expectations for drink strength and price once you spot the house measure on the menu footer.

Glassware Quirks That Change The Pour

Shot glasses come in many shapes: straight-wall, flared, and heavy-base styles. Thick glass steals interior space, so two pieces with the same outside height may hold different volumes. Some novelty glasses reach 60 mL or more. Graduation marks help, yet many decorative pieces have none. When you buy glassware, test each style with water and a kitchen scale. One gram equals one milliliter. Fill to the rim and record the number, then mark your line. Keep those figures on a label for control.

If you inherit mixed glassware, test one of each shape. Small variation stacks up across a shift and changes strength, waste, and guest experience and pricing.

Straight Answer

A single pour is a moving target now that depends on where you drink and who’s pouring. If you’re in the U.S. or Canada, plan on 44 mL for a standard shot. In the U.K., expect 25 mL or 35 mL. In Australia, 30 mL is the go-to. With the conversions and tables above, you can size recipes with confidence anywhere.