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If you only buy one accessory after the grinder, make it a scale. Espresso recipes are written in grams. A typical double is 18 g of ground coffee in and about 36 g of liquid out, a 1:2 ratio, in roughly 25 to 30 seconds. Without a scale you’re guessing at two of those three numbers.
Why not just watch the volume in the cup? Crema. A fresh shot can be half foam, and the line on a shot glass tells you almost nothing about how much coffee is actually in there. Weight doesn’t lie.
What an Espresso Scale Needs
- 0.1 g resolution. One gram either way changes a shot. A scale that reads in whole grams can’t see it.
- A built-in timer. You want weight and time on one screen.
- Auto-start. The timer starts when the first drops land. Your hands are busy with the machine.
- A small footprint. About 10 cm across or less, so it fits on the drip tray under the portafilter. This rules out most pour-over scales.
- USB-C charging. Coin cells die mid-shot.
A kitchen scale fails on almost all of these. It’s fine for weighing beans, and nothing else.
Scales Worth Buying
Timemore Black Mirror Nano. This is the one most home baristas should look at first. It measures about 99 by 114 mm, reads to 0.1 g up to 2 kg, starts the timer when weight lands and charges over USB-C. Battery life is around 15 hours of use. It fits on most drip trays, including Breville’s.
Acaia Lunar. The café standard, and priced like it. It’s about 10.4 cm square and very thin, water-resistant, with several auto-tare and auto-timer modes and a Bluetooth link to an app. It ships with a 100 g calibration weight. You pay for build quality and speed of response. The coffee won’t taste different.
MiiCoffee Nano. The budget pick that still ticks every box. It’s under 10 cm wide, reads 0.1 g, and has an espresso mode that starts the timer at the first drip.
Varia AKU Mini. Reads to 0.01 g and has a ratio mode for espresso. Note the 500 g limit. A heavy 58 mm portafilter can push past that, so weigh the beans in a dosing cup rather than in the portafilter.
Scales to Skip for Espresso
The Timemore Black Mirror Basic 2 and the Greater Goods 0.1 g coffee scale are good scales with large platforms meant for pour-over. Check your drip tray before you buy one. If it doesn’t fit, it ends up on the counter, and then it can’t weigh the shot.
Using It Every Morning
Weigh the beans. Grind. Put the cup on the scale, tare to zero, pull the shot and stop at your target weight. If 36 g arrives in 18 seconds, grind finer. If it takes 40, grind coarser. That’s the whole loop. Our grinder guide explains why the grinder has to be able to follow it.
For a cortado, keep the scale on for the milk too. A double shot plus about the same weight of warm milk gives you the drink described in what is a cortado.
Numbers make the next shot better than the last.