You are aiming for 36 grams of espresso. The scale reaches 36.0, you stop the pump, and the display keeps climbing. A few moments later, the cup contains 39 grams.

Did you stop too late? Is the scale slow? Is something wrong with the machine?

The final weight can differ from the reading when you press stop for more than one reason. Coffee may still be entering the cup, and the display may still be catching up with a changing load. The useful response is to measure what happens on your setup, then adjust your stopping point—not assume every machine needs the same correction.

Separate the stopping point from the final yield

For this guide, keep three numbers distinct:

• Target yield: the beverage weight you want to collect.
• Stop reading: the weight displayed when you press the button or move the paddle to stop brewing.
• Final yield: the weight of the espresso you actually collect, read once no more coffee is entering the cup and the display has settled.

The difference between the final yield and the stop reading is your post-stop increase. The difference between the final yield and your target is the overshoot.

For example, stopping at a displayed 34.0 grams and finishing at 36.2 grams gives a post-stop increase of 2.2 grams. If your target was 36.0 grams, the overshoot is only 0.2 grams. These are illustrative numbers, not a recommended stopping offset.

Use the final beverage weight when recording your brew ratio. An 18-gram dose with 36 grams in the cup is a 1:2 ratio; if you collect 39 grams, the result is about 1:2.17, even if you pressed stop at 36. La Marzocco likewise defines espresso yield as the mass of liquid espresso extracted, separate from the dry coffee dose. Espresso recipe guide

Why the number keeps rising

Coffee can still reach the cup after you press stop

Stopping the pump does not remove coffee already falling toward the cup or draining through the portafilter. Depending on the machine, pressure may also take time to release. How much coffee arrives afterward depends on the setup and the flow near the end of the shot.

Even a portafilter change can matter. La Marzocco notes that switching between spouted and bottomless portafilters can alter drip behavior enough to affect the initial accuracy of its predictive weight-based stopping system. That is a useful reminder that the stopping point belongs to the whole brewing setup, not just the scale. Brew-by-weight support

The display may lag behind a changing load

A scale processes its sensor readings before showing a number. Filtering can make that number steadier, but it can also slow the displayed response. Acaia explicitly describes this tradeoff in its weighing-filter documentation. Weighing filter

This is different from resolution. A display that changes in 0.1-gram steps tells you the size of its displayed increments—not how quickly it responds or whether every reading is accurate to 0.1 gram. Weighing resolution

Your own reaction time matters, too. Coffee continues arriving while you notice the target and reach for the control. A faster final flow leaves less time to act. None of these factors can be isolated just by looking at the final overshoot.

Find a stopping point for your own setup

Try this across three to five similar shots you would normally brew. You do not need to make and discard a batch purely for testing.

Keep the setup consistent

Use the same coffee, dose, basket, portafilter, and grind setting. Place the scale on a stable surface, tare the cup, and check that the cup does not touch the machine or portafilter. Keep the display visible without having to move the cup.

Choose one collection routine. For an initial test, leave the cup in place through the brief trailing drips, then record the weight as soon as the reading settles. If your routine is to remove the cup earlier, use that same removal point each time. Record its empty weight beforehand so you can reweigh it afterward and subtract the cup weight to find the amount of espresso collected.

Record both readings

Note the displayed weight when you stop brewing and the final collected weight. A short phone video can make the stopping moment easier to check afterward.

Here is an illustrative log with a 36.0-gram target:

Shot	Stop reading	Final yield	Post-stop increase	Overshoot
1	36.0 g	38.1 g	2.1 g	2.1 g
2	36.0 g	37.9 g	1.9 g	1.9 g
3	36.0 g	38.2 g	2.2 g	2.2 g

These example shots finish about 2 grams above the stop reading. A reasonable next experiment would be to stop near 34 grams and check whether the final yield lands closer to 36 grams.

That is an empirical adjustment for this example—not a universal “stop 2 grams early” rule.

Check the result before changing anything else

Repeat with the earlier stopping point and taste the espresso. If the final weight is more repeatable and the cup tastes good, keep that routine.

If the post-stop increase varies widely, first check whether your collection timing, cup placement, or shot flow is changing. A single average offset will not solve a setup that behaves differently on every shot.

Recheck the offset after a meaningful change, such as adjusting the grind, changing the dose or portafilter, or switching coffees. Treat it as a working estimate, not a permanent calibration value.

Do not change the grind just to fix the last few grams

Grinding finer can change how the shot flows, but it also changes the brewing conditions. If the coffee already tastes balanced and the main issue is that you keep collecting more than intended, adjust the stopping point first.

When the flow itself is inconsistent or the flavor needs work, return to your recipe and puck preparation. Keep a note of the final yield so you can distinguish a recipe change from a difference in how much coffee you collected.

An extra few tenths of a gram is not, by itself, proof of a bad shot. Likewise, reaching an exact number does not guarantee good flavor. Weight makes your recipe easier to repeat; tasting tells you whether that recipe is worth repeating.

Automatic timing is not automatic pump control

A scale that starts or stops its timer does not necessarily control your espresso machine. Bluetooth connectivity alone does not establish that capability either.

Automatic stopping by beverage weight requires a compatible control connection between the scale and machine, along with the required software or firmware. For example, La Marzocco documents specific compatibility requirements and uses prediction to account for the final drips. Check your own equipment documentation rather than assuming any connected scale can stop the pump. Brew-by-weight compatibility and operation

With a manually controlled machine, a clear view of the scale and a practiced stopping routine remain useful parts of the workflow.

Common questions about espresso overshoot

Should I count the last drips in my recipe

Count the espresso you actually collect and drink. If the trailing drips land in your cup, include them in the final yield. If you remove the cup and they fall into the drip tray, do not include them. Use the same collection routine when comparing shots.

Does continued dripping prove that the machine is faulty

No. A brief tail of drips alone does not establish a fault. If the machine keeps delivering a sustained flow after you stop brewing, or its behavior changes suddenly, check the operating manual and contact the manufacturer. Do not loosen the portafilter to release pressure.

Should I record the time at pump shutoff or after dripping stops

Record the convention you use and keep it consistent. For manual logging, pump-shutoff time and final collected weight can be separate entries. If your scale stops its timer automatically, check what event triggers it so you know what that number represents.

Make the next shot easier to repeat

For your next few shots, record the stop reading alongside the final yield. Keep the collection routine consistent, look for a repeatable difference, and test a small adjustment to your stopping point.

The goal is not to chase every decimal. It is to make the amount of espresso in your cup a deliberate part of the recipe.