Espresso dial-in calculator
Updated
Set your dose and shot style to get a target yield, then read your shot time and taste to know exactly which way to move the grinder. The fastest path from a random shot to a dialed-in one.
Shot style
The standard modern shot. 1:2 in:out.
Target yield for classic (1:2)
36 g out
Your actual brew ratio
1:2
In the window — now taste
Time is in the 25–30s sweet spot. Taste it: sour or sharp means grind finer; bitter or dry means grind coarser; balanced and sweet means you are dialed in. Change one variable at a time.
Rule of thumb: keep dose and target yield fixed, and use the grinder as your main lever. Finer grind slows the shot; coarser speeds it up. Adjust one thing per shot.
Before your first shot
- Warm the setup. Let the machine reach its ready state. Breville recommends preheating the basket and portafilter, then wiping them dry before dosing.
- Fix the dose. Use your basket’s rated range; the BES870 double basket takes 16–19 g. Enter that dose above and keep it constant.
- Weigh the yield. Tare your cup on a scale and stop at the calculator’s target.
- Record and taste. Note dose, yield and time. Use the diagnosis above to change one variable for the next shot.
Preparation and basket capacity: Breville BES870 instruction book, pages 17–19.
Ristretto, normale and lungo
Same dose, different stopping point. These are the yields the calculator targets for each style, from an 18 g double basket and a 9 g single:
| Style | Ratio | From 18 g | From 9 g | In the cup |
|---|---|---|---|---|
| Ristretto | 1:1.5 | 27 g | 13.5 g | Short, syrupy, concentrated |
| Normale (classic) | 1:2 | 36 g | 18 g | The standard modern shot |
| Lungo | 1:3 | 54 g | 27 g | Longer, lighter, more volume |
Aim for 25 to 30 seconds whichever style you pull. The calculator reads shot time the same way for all three, flagging anything under 22 seconds as fast and over 34 as slow, and keeps grind as the main lever.
Doses and timing: Breville Barista Express (BES870) instruction book: 1-cup basket 8–11 g, 2-cup 16–19 g, 25–30 s optimum; National Coffee Association — espresso (1:2 ratio, 20–30 s).
What actually moves the needle
Dial-in lives and dies by the grinder, not the machine. If your shots are wildly inconsistent, the grinder is almost always why.
Still chasing a sour or bitter shot? Read sour vs bitter espresso for the full diagnostic.
Common questions
How many grams of coffee for a double shot?
Breville's Barista Express manual rates its 2-cup basket at about 16 to 19 g and its 1-cup basket at about 8 to 11 g. This calculator starts at 18 g, the middle of that double-basket range. Whatever your basket, keep the dose fixed while you dial in the grind.
What is a good espresso brew ratio?
The National Coffee Association gives 1 g of dry coffee to 2 g of brewed espresso, 1:2, so 18 g in for about 36 g out. Ristretto runs shorter at around 1:1.5 for a syrupy, concentrated cup; lungo runs longer at about 1:3 for more volume and a lighter body.
What is the difference between ristretto, normale and lungo?
Only how much espresso you let through the same dose. From 18 g, the calculator targets 27 g out for a ristretto, 36 g for a normale and 54 g for a lungo. Shorter shots taste thicker and more intense; longer ones thinner, with more of the late, bitter end of the extraction.
What is the difference between a lungo and an americano?
A lungo pushes more water through the coffee puck, so the extra water extracts more from the grounds. An americano is a normal espresso with hot water added afterwards, so it is diluted without being extracted further. A lungo usually tastes more bitter; an americano tastes like a lighter espresso.
How long should an espresso shot take?
Breville's manual puts the optimum at 25 to 30 seconds, with under 20 seconds pointing to a grind that is too coarse and over 35 seconds to one that is too fine; the National Coffee Association gives 20 to 30 seconds. Time is the quickest signal, but taste is the final judge.
My shot is sour. What do I change?
Sour or sharp flavor is under-extraction. Grind finer one step, which slows the water down and pulls more from the coffee, then taste again. If it is also running fast, finer grind fixes both at once. Change only one variable per shot so you know what did what.
My shot is bitter. What do I change?
Bitter, dry, or ashy flavor is over-extraction. Grind coarser one step to speed the shot up and pull less from the coffee. If the shot is also choking and dripping slowly, coarser grind is the fix. Give the grinder a moment to purge old grounds after each adjustment.
Do I need a fresh grinder to dial in espresso?
Espresso is the most grind-sensitive brew method there is, so a grinder with fine, repeatable adjustment matters more here than anywhere else. Pre-ground coffee and cheap blade grinders cannot make the small, even changes dial-in depends on. A quality burr grinder is the single upgrade that makes espresso learnable.