Measured, not summarised

We weigh the coffee so you don’t buy the wrong grinder.

Every grinder here has been bought at retail, used daily, and measured on a 0.01 g scale. Retention in grams. Dose consistency across twenty runs. No spec sheets, no sponsorships.

The bench

Every grinder we have measured, same beans, same operator, same scale.

GrinderPriceRetentionDose SD18 g timeStep
Kingrinder K6 $990.31 g±0.14 g 34 s16 µm Best value
1Zpresso J-Ultra $1790.28 g±0.11 g 29 s8 µm Best espresso

Full protocol and raw data: /testing/methodology/ · Prices checked 12 Jul 2026

Start here

Three routes in, depending on where you are.

01

I’m buying my first grinder

The ranked list, with the measurements behind every pick.

 02

I just bought one

Starting click counts for your exact model, by brew method.

 03

Something tastes wrong

Sour, bitter, or thin — diagnose it from the grind.