What is a 1:2 espresso ratio in grams?

One gram of dry coffee to two grams of liquid espresso. An 18 g dose yields 36 g of espresso. Weigh the cup on a scale; do not use the machine's volumetric buttons, which drift with grind and basket wear.

Is 1:2 or 1:2.5 better for espresso?

Neither is universally better. 1:2 is the traditional reference and works well for medium roasts. 1:2.5 and longer help light roasts extract fully without tasting sour, and short 1:1.5 ristrettos suit dark roasts and milk drinks. Pick by roast, then adjust grind.

What ratio is a ristretto?

Roughly 1:1 to 1:1.5 — an 18 g dose yielding 18–27 g. It is denser, sweeter and less bitter because fewer of the late, harsh compounds make it into the cup. It is also easier to under-extract, so keep the grind fine and the time short.

What ratio is a lungo?

1:3 to 1:4, so an 18 g dose yielding 54–72 g. Because it runs so long, the last third of the shot is mostly water washing over an exhausted puck — most people prefer adding hot water to a normal shot instead.

Does the dose change the ratio?

No — the ratio is a ratio, so 14 g at 1:2 yields 28 g and 20 g at 1:2 yields 40 g. What dose does change is the depth of the puck. Under-fill the basket and the water channels through it regardless of the ratio you picked.

Espresso Ratio Chart — Grams for Every Dose and Ratio

How to use the chart

Find your dose on the left, follow the row across to your ratio. The number in the cell is the weight of espresso to stop the shot at. Weigh the cup — do not trust the machine's volume markings.

One exception: if your basket is under-dosed, the puck will channel regardless of what the chart says. A 20 g basket wants 19–20 g of coffee. Match the dose to the basket first, then pick a ratio.

Which column should you start in?

1:1.5 — syrupy, low bitterness, tiny volume. Good for milk drinks and dark roasts.
1:2 — the universal starting point. If you have no idea where to begin, start here.
1:2.5 — the modern specialty default. More acidity, more clarity, thinner body.
1:3 — lungo. Long finish, high water content. Works with very dense light roasts.

Beyond the chart

These numbers get you to a repeatable shot. Getting it to taste good is about grind and temperature. Read the dialing-in guide for the order of operations, or take a TDS reading and check it on the strength calculator.

Ratio versus brew time

A ratio on its own tells you nothing about whether the shot will taste right. A 1:2 in 20 seconds and a 1:2 in 45 seconds can have identical numbers on the scale and completely different cups. Time is the second variable, and grind is the only thing that moves it.

The working rule: fix the ratio, then fix the time with grind, then fix the taste with temperature. Most 1:2 shots land between 25 and 32 seconds from first drip on a modern light roast. If you are far outside that window at 1:2, your grind is wrong for the basket, not your ratio.

Ratio by roast level

Roast level moves the useful ratio window more than most people expect. Darker roasts dissolve faster and give up more solubles early, so they turn bitter at yields that would still taste thin on a light roast.

Roast	Starting ratio	Time at 1:2	Moves toward
Light / filter roast	1:2.5 – 1:3	28–35 s	Longer, finer
Medium	1:2 – 1:2.25	25–30 s	Baseline
Medium-dark	1:1.75 – 1:2	22–28 s	Shorter, coarser
Dark / classic Italian	1:1.5 – 1:1.75	20–25 s	Short ristretto

These are starting points, not rules. A dark roast pulled at 1:3 will usually taste ashy and hollow; a light roast pulled at 1:1.5 will usually taste sour and salty no matter how you grind.

Reading the chart for milk drinks

If the shot is going into milk, pull it shorter and stronger than you would drink straight. Milk dilutes intensity by roughly half in a 6 oz cappuccino, so a 1:2 that tastes balanced on its own will taste flat once the milk goes in. Move to 1:1.75–1:2 and keep the dose the same.

For the other direction — a lungo or an americano — the shot gets diluted with water after the fact, which is not the same thing as pulling a longer ratio. Pulling longer extracts more, diluting extracts the same and adds volume. If you want more coffee, add hot water; if you want more extraction, pull longer.

Espresso Ratio Chart