Quick Answer: The standard espresso ratio is 1:2 — 18g of ground coffee yields 36g of liquid espresso in 25–30 seconds. Enter your dose and select a ratio below to calculate your exact yield target and extraction timing. Adjust one variable at a time when dialing in.
Espresso Ratio Calculator
Dose → Yield · Timing · Shot Profile
Ground coffee going in. Typical: 16–20g
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Espresso Ratios — Reference Guide
Every espresso ratio is a relationship between the dry coffee going in (dose) and the liquid espresso coming out (yield), both measured by weight in grams. The ratio determines concentration, body, and which flavor compounds dominate the cup. Extraction time follows from the ratio and grind setting — it is the diagnostic tool that tells you whether the shot was extracted correctly, not just whether it hit the yield target.
| Shot type | Ratio | Yield (from 18g dose) | Timing target | Character |
|---|---|---|---|---|
| Ristretto | 1 : 1.5 | 27g | 15–20 sec | Syrupy, intense sweetness |
| Normale | 1 : 2 | 36g | 25–30 sec | Balanced, standard baseline |
| Allongé | 1 : 2.5 | 45g | 30–38 sec | Lighter body, brighter acidity |
| Lungo | 1 : 3 | 54g | 35–45 sec | More volume, more bitter notes |
Ratio and timing are linked but not fixed — changing the grind setting shifts extraction time without changing the yield target. The calibration process is iterative: set a yield target, pull the shot, record the time, taste the result, then adjust the grind by one step in the correct direction. Dose changes the absolute volume of both input and output; ratio changes the relationship between them.
Tools that make the ratio repeatable
Recommended accessories
Frequently Asked Questions
What is the standard espresso ratio?
The standard espresso ratio is 1:2 — one gram of ground coffee produces two grams of liquid espresso. For a double shot, this means 18g of ground coffee yields approximately 36g of espresso in 25–30 seconds. This ratio is the industry baseline and the correct starting point when dialing in a new bean or machine. Adjust from there based on taste: ristretto (1:1.5) for more concentration, lungo (1:3) for more volume.
How do I measure espresso yield?
Espresso yield is measured by weight in grams, not by volume. Place a digital scale under the cup before starting extraction. Tare the scale, start the shot, and stop when the scale reaches your target yield — for a 1:2 ratio with an 18g dose, stop at 36g. Volume measurements are unreliable because espresso density varies with grind, temperature, and extraction. A scale that reads to 0.1g resolution gives the most accurate results.
What is the difference between ristretto and lungo?
Ristretto uses a shorter ratio (1:1.5) and a shorter extraction time (15–20 seconds), producing a concentrated, syrupy shot with bold sweetness and minimal bitterness. Lungo uses a longer ratio (1:3) and an extended extraction time (35–45 seconds), producing more volume with lighter body and more bitter compounds. Both use the same dose — only the yield and timing differ. A normale (1:2, 25–30 sec) sits between them and is the standard reference point.
Does changing the ratio require adjusting the grind?
Yes — when you change the target ratio without adjusting the grind, the extraction time changes along with the yield. To maintain the same extraction time at a different ratio, adjust the grind: finer to slow flow and reduce yield, coarser to speed flow and increase yield. For example, moving from a 1:2 to a 1:1.5 ristretto typically requires grinding finer to slow the shot and concentrate the extraction within the shorter time window. Adjust one variable at a time.
What ratio should I use for milk-based drinks?
A 1:2 normale (double shot, 36g yield) is the standard base for cappuccinos, flat whites, and lattes. The espresso flavor needs to be strong enough to come through the steamed milk — a normale provides that balance. For a cappuccino (equal thirds of espresso, milk, and foam), a strong, well-extracted double shot ensures the coffee character is present in the finished drink. A ristretto base is sometimes used in milk drinks for a more intense espresso note without increasing volume.
Free: The Espresso Buyer's Field Guide
Machine tiers, grinder pairing, and ratio reference — formatted for field use