Espresso Ratio Calculator (Dose In, Yield Out)
Enter your dose and target ratio to get the exact yield for ristretto, normale, or lungo shots.
What this tool does
Espresso is brewed at a 1:2 ratio by default — 18 grams of coffee in, 36 grams of espresso out — but the right ratio for your palate and your beans could be anywhere from 1:1.5 (a tight, syrupy ristretto) to 1:3 or beyond (a long, tea-like lungo). Understanding brew ratio is the foundation of dialing in a shot: it determines body, sweetness, and bitterness more directly than almost any other variable except grind size.
How to use this tool
Choose a shot style
Tap Ristretto (1:1.5), Normale (1:2), or Lungo (1:3) for a starting point. Each one lights up the ratio slider at the canonical value for that style.
Enter your dose
Your dose is the weight of dry coffee you put in the portafilter. Most standard single baskets take 7–9 g; doubles take 14–20 g. If you are not sure, weigh what your grinder outputs for one dose.
Read the yield
The yield is the weight of liquid espresso in your cup after the shot pulls. Place a digital scale under your portafilter, tare it to zero, and stop extraction when it hits the calculated number.
Taste and adjust the ratio, not the dose
If the shot tastes sour or hollow, let it run a little longer (higher ratio). If it tastes bitter or harsh, cut it shorter (lower ratio). Keep the dose constant while you dial in the ratio.
Pro tips
- Brew ratio and grind size work together. A finer grind slows the shot and produces more yield; a coarser grind speeds it up. If your ratio is right but the taste is off, adjust grind next.
- Shot time is a rough guide, not a rule. A 25-second shot at 1:2 on one machine might be 32 seconds on another. Trust taste and scale over the clock.
- Single-origin light roasts often pull better at 1:2.5–1:3. The extra yield dilutes the acidity and sweetens the cup. Don't force a 1:2 ratio if the shot isn't tasting right.
- Espresso at 1:10 or higher is sometimes called a "filter espresso" or "long black espresso" — common in specialty coffee shops. Not a mistake, just a style.
Why it matters
Most espresso problems — bitterness, sourness, thin body — trace back to brew ratio before anything else. Fixing ratio costs nothing and changes everything. Lock in a ratio that tastes good, then you can start experimenting with dose, grind, temperature, and pre-infusion from a solid baseline.
Frequently asked questions
What is a normal espresso ratio?
A "normale" shot is 1:2 — for example 18 g of coffee in, 36 g of espresso out, in about 25–30 seconds. Ristretto is 1:1–1:1.5 and lungo is 1:3 or more.
How do I fix a sour or bitter shot?
Sour and fast usually means grind finer; bitter and slow means grind coarser. Change one variable at a time and keep the ratio consistent.