What the espresso calibration form records
The espresso calibration form tracks the three numbers manufacturers use to define a recipe, plus the settings and notes that explain them. Rancilio's dialing-in guide recommends tracking input weight, output weight, and brew time to find patterns across coffees. La Marzocco describes dose and yield together as the coffee-to-water ratio that is the foundation of every shot.
Printable espresso dial-in sheet
| # | Grind setting | Dose (g) | Yield (g) | Ratio | Time (s) | Taste notes | Next change (one only) |
|---|---|---|---|---|---|---|---|
| 1 | |||||||
| 2 | |||||||
| 3 | |||||||
| 4 | |||||||
| 5 | |||||||
| 6 | |||||||
| 7 | |||||||
| 8 | |||||||
| 9 | |||||||
| 10 |
Ratio = yield / dose. Change one variable per line. Circle the line you keep.
How to fill in the espresso dial-in sheet
- Header line: write the coffee, roast date, grinder and basket size once per bag, plus the target recipe you are aiming for.
- Grind setting: the number or click count on your own grinder. Grinder numbers do not transfer between models, so the sheet only compares settings on one grinder.
- Dose and yield: weigh the dry coffee and the espresso in the cup in grams. How to weigh and time espresso shots covers scale placement. If the scale keeps climbing after you stop the pump, see espresso scale delay vs coffee dripping after you stop to decide which number to log.
- Ratio: divide yield by dose. Breville describes 1:2 as the standard reference; the espresso brew ratio guide explains shorter and longer ratios.
- Time: Breville gives 25 to 30 seconds as a typical target and notes a good shot can take 20 to 40 seconds. Start the timer the same way on every line.
- Taste notes: two or three words (sour, sharp, sweet, bitter, drying, thin, syrupy). Before you fill in the taste column, try describing the shot blind so the roaster's notes do not steer you; see how to taste espresso without reading the bag notes first.
- Next change: one variable only. Breville's guide advises changing one variable at a time and keeping everything else the same.
Example espresso dial-in log: one coffee, five shots
The example below is an illustrative espresso dial-in log, written to show how the columns work together rather than as measured results. It starts from the 18 g in, 36 g out recipe that Rancilio and La Marzocco both use as a starting point, and changes grind first, then yield.
| # | Grind | Dose (g) | Yield (g) | Ratio | Time (s) | Taste notes | Next change |
|---|---|---|---|---|---|---|---|
| 1 | 12 | 18.0 | 36.0 | 1:2.0 | 19 | Sour, thin | Grind finer (11) |
| 2 | 11 | 18.0 | 36.0 | 1:2.0 | 24 | Less sour, still sharp | Grind finer (10) |
| 3 | 10 | 18.0 | 36.0 | 1:2.0 | 29 | Sweet, balanced | Keep grind; try longer yield |
| 4 | 10 | 18.0 | 40.0 | 1:2.2 | 32 | Lighter body, slightly bitter finish | Return to 36 g |
| 5 | 10 | 18.0 | 36.0 | 1:2.0 | 28 | Sweet, balanced (repeat) | Lock in recipe |
In the example espresso dial-in log, lines 1 to 3 change only grind, so the drop in sourness is attributable to grind. Line 4 tests a longer yield at the same grind, and line 5 repeats the best recipe to confirm the result before it is locked in. To use the dial-in sheet for an A/B test between two recipes, follow the guide on how to compare two espresso recipes using a shot log.
Reading taste notes on the espresso dial-in sheet
Taste notes on the espresso dial-in sheet point to the next change. Breville links a fast shot with a sour, thin-bodied cup and suggests a finer grind or a dose increase of a gram or two; for a slow, over-extracted shot it suggests grinding coarser or cutting the dose slightly. Rancilio gives the same directions: grind finer or increase dose when a shot runs fast, grind coarser or decrease dose when it runs slow. For deeper diagnosis, see sour espresso and bitter espresso.
Espresso dial-in sheet FAQ
What is an espresso calibration form?
An espresso calibration form is a log sheet for recording each test shot while dialing in: dose, yield, brew ratio, shot time, grind setting, taste, and the single change planned for the next shot. The written record shows which change moved the shot toward a good result.
What starting recipe should go on the first line of the espresso dial-in sheet?
Rancilio suggests 18 grams in, 36 grams out in about 28 seconds as a starting point, and Breville describes 1:2 as the reference ratio with 25 to 30 seconds as a typical target. Use your machine manual's basket size if it differs.
How many variables should change between lines on the espresso dial-in sheet?
One. Breville advises changing one variable at a time, such as grind size, and keeping everything else the same, so each line on the sheet isolates the effect of a single change.
Do I need a scale to use the espresso dial-in sheet?
Yes for the dose and yield columns. Rancilio recommends weighing both the dry coffee going in and the espresso coming out in grams, so the sheet records mass rather than cup volume.