How much milk goes in a latte? Most lattes use about 5 to 10 oz (150–300 ml) of steamed milk with one or two shots of espresso. That is a ratio of roughly 1 part espresso to 3–5 parts milk, topped with a thin layer of foam about 1 cm deep. These are café conventions, not fixed rules, so sizes vary.

This guide breaks the latte ratio down by cup size, by shot count and in both ounces and milliliters, with reference recipes from USDA, Starbucks and Breville. For the full step-by-step method, from pulling the shot to steaming and pouring, see how to make a latte.

The short answer

Cup size Espresso Steamed milk Ratio (espresso : milk)
8 oz (240 ml) 1–2 shots, 1–2 oz (30–60 ml) 5–6 oz (150–180 ml) about 1:2.5 to 1:6
10 oz (300 ml) 2 shots, 2 oz (60 ml) about 7 oz (210 ml) about 1:3.5
12 oz (350 ml) 2 shots, 2 oz (60 ml) 8–9 oz (240–270 ml) about 1:4 to 1:4.5
16 oz (475 ml) 2–3 shots, 2–3 oz (60–90 ml) 12–13 oz (350–385 ml) about 1:4 to 1:6
20 oz (590 ml) 2–3 shots, 2–3 oz (60–90 ml) 16–17 oz (475–500 ml) about 1:5.5 to 1:8.5

These are typical ranges, not a standard. Milk amounts are measured as steamed milk in the cup and leave a little room at the rim.

What is the latte ratio?

The latte ratio is the proportion of espresso to milk. There is no official definition, but most cafés and recipes land between 1:3 and 1:5, meaning three to five times as much milk as espresso. A 1:3 latte tastes noticeably of coffee; a 1:5 latte is milder, sweeter and creamier. This is not the same as the espresso brew ratio of coffee dose to shot weight, which our espresso ratio guide explains.

Three published reference points show where that range comes from:

  • USDA’s standard latte is built from about 62 g of espresso and 305 g of 2% milk, roughly 1:5 by weight, or about 2 oz of espresso to 10 oz of milk.
  • Breville’s machine manual describes a latte as a single espresso with textured milk and about 10 mm of foam, in a 200–220 ml glass. With a 30 ml shot, that leaves about 170–190 ml for milk and foam, an estimate of roughly 1:6.
  • Starbucks uses one shot in its 8 oz and 12 oz hot lattes and two in its 16 oz and 20 oz, so its milk share is on the high side.

Cafés that serve “specialty” lattes often go stronger, with a double shot in a 10–12 oz cup.

Latte milk to espresso ratio by volume or weight

Ratios are usually quoted by volume in ounces or milliliters. Milk and espresso are both close to water in density, so a volume ratio and a weight ratio come out nearly the same. If you use a scale, 60 g of espresso to 240 g of milk is the same drink as 2 oz to 8 oz, give or take a few percent.

How much milk in a latte by cup size

An 8 oz latte takes about 5–6 oz of milk, a 10–12 oz latte about 7–9 oz and a 16 oz latte about 12–13 oz, depending on the number of shots. Here is how those amounts play out in practice.

  • 8 oz (240 ml). The most coffee-forward latte. With a single shot, use about 5–6 oz of milk. With a double, stay near 5 oz or the drink will overflow.
  • 10–12 oz (300–350 ml). The classic home latte. A 2 oz double with 7–9 oz of steamed milk lands right in the 1:3.5 to 1:4.5 range.
  • 16 oz (475 ml). With two shots, you need about 12–13 oz of milk to fill the cup, a ratio near 1:6. A third shot brings it back toward 1:4.
  • 20 oz (590 ml). Mostly milk. Even with three shots the ratio is about 1:5.5, so expect a very mild drink.

A bigger cup does not mean more coffee unless you add shots. It mainly means more milk, which also changes the caffeine story; see how much caffeine is in a latte for the numbers.

How much milk in a latte with one shot vs two shots

Diagram of three lattes at a 1 to 4 espresso-to-milk ratio: one shot with 120 ml of milk, two shots with 240 ml and three shots with 360 ml, each with a thin foam layer

If you start from the shot rather than the cup, multiply the espresso volume by your chosen ratio:

Espresso Milk at 1:3 Milk at 1:4 Milk at 1:5
1 shot, 1 oz (30 ml) 3 oz (90 ml) 4 oz (120 ml) 5 oz (150 ml)
2 shots, 2 oz (60 ml) 6 oz (180 ml) 8 oz (240 ml) 10 oz (300 ml)
3 shots, 3 oz (90 ml) 9 oz (270 ml) 12 oz (360 ml) 15 oz (450 ml)

A single shot with 4–5 oz of milk fits a 6–8 oz cup. A double with 8–10 oz of milk is the 12 oz latte most cafés sell. Shot volumes vary: Italy’s espresso institute defines an espresso as about 25 ml, and many home machines pull about 30 ml per single.

How many shots of espresso in a latte?

One or two is standard. Small lattes (8 oz and under) often use one shot; 12 oz and larger usually use two. Some cafés and home baristas use a double as the default for every size. If a large latte tastes like warm milk, the fix is a third shot rather than less milk.

How much milk in an iced latte?

A tall iced latte in a slim glass with espresso settling over cold milk

An iced latte uses less milk than a hot one of the same cup size, because ice takes up part of the glass. USDA’s iced latte recipe uses about 62 g of espresso, 183 g of 2% milk and one cup of ice. That is roughly 2 oz of espresso to 6 oz of milk, a ratio near 1:3.

In a 12 oz glass, that translates to a double shot, about 6 oz of cold milk and ice to the top. In a 16 oz glass, use about 8 oz of milk. Starbucks keeps its iced Tall at one shot and iced Grande at two, then adds a third shot to its 24 oz iced Venti.

How much foam on a latte?

Side view of a latte in a glass on a saucer, with espresso and milk below a thin layer of foam

A latte has the thinnest foam of the classic milk drinks. Breville’s manual specifies about 10 mm (just under half an inch) of foam on a latte. That thin layer is why a latte feels smooth and liquid all the way down.

Foam depth is part of the milk ratio. The more air you add while steaming, the more of the cup is foam instead of liquid milk, and the drink starts to drift toward a cappuccino. For a latte, add air for only a few seconds, then let the milk spin until it looks glossy. Our espresso with milk guide explains steaming temperature and foam texture.

Latte ratio vs cappuccino, flat white and cortado

A latte is the milkiest of the four, while a cappuccino turns more of its milk into foam, a flat white uses less milk in a smaller cup and a cortado is close to equal parts espresso and milk.

Drink Typical espresso Typical milk Ratio (approx.) Foam
Latte 1–2 shots 5–10 oz (150–300 ml) 1:3 to 1:5 Thin, about 1 cm
Cappuccino 1 shot, 25 ml (IEI) 100 ml steamed milk (IEI) about 1:4, with more of it foam Thick
Flat white 1 or 2 shots Less than a latte, cup of 8 oz or less Varies with the cup; stronger than a latte Thin, about 1/4 in (6 mm)
Cortado 2 shots About equal milk about 1:1 to 1:2 Little or none

The cappuccino row is the Istituto Espresso Italiano’s certified recipe and the flat white row follows Breville’s guideline; the latte and cortado rows are common conventions. The key difference is not just how much milk, but how much of it is foam. Read flat white vs cappuccino and cortado vs latte for the full comparisons.

How to adjust the latte ratio to taste

To adjust a latte, start at about 1:4 espresso to milk, then add a shot or use a smaller cup if it tastes too milky, and add milk if it tastes too strong.

  1. Start at 1:4. A 2 oz double with 8 oz of steamed milk in a 10–12 oz cup is a sensible baseline.
  2. Too milky? Add a shot or drop to a smaller cup before cutting milk sharply.
  3. Too strong or bitter? Move toward 1:5, or switch to whole milk, which tastes sweeter and rounder.
  4. Adding syrup? Flavor syrups take space and sweetness, so a slightly stronger ratio keeps the coffee noticeable.
  5. Steam a little less than you need. Start with slightly less cold milk than the target, since steaming adds some volume.

The bottom line

A latte is mostly milk: about 5–10 oz of steamed milk to one or two shots, a ratio of roughly 1:3 to 1:5, under about 1 cm of foam. For a 12 oz cup, a double shot and 8–9 oz of milk is the classic balance. Bigger cups need more shots, not just more milk, if you want the coffee to come through.

Sources