Single dosing means weighing beans for one brew and grinding all of them, rather than filling a hopper and grinding on demand.
The case for it
Freshness. Beans in a hopper sit exposed to air and light. If you get through a hopper in three days that is irrelevant; if it takes three weeks it is not.
Flexibility. Switching between an espresso blend and a filter single origin is trivial when you weigh in each dose and impossible with a full hopper.
Precision. You know exactly what went in.
The case against
Retention. With a hopper, the coffee left in the chute is the same coffee, so it does not matter. Single-dosing, that gram is yesterday — and if you switched beans, it is the wrong coffee entirely.
Speed. Weighing every dose adds a step to every coffee.
Grind-by-weight drift. Some grinders behave slightly differently with an empty hopper, since there is no weight of beans pushing down on the burrs.
The practical middle
If you drink one blend and finish a bag in two weeks, use the hopper.
If you buy 250 g bags of different coffees, single dose — and add a bellows or a firm tap to clear retention, plus a spray of water on the beans to kill static.
Last reviewed 8 August 2026