Input lever
Grind & Particles
Wheel face
Grinder model
The grinder used to prepare the coffee.
AeroPress Wheel Variable
Median particle size
Grind & Particles · Process state
The middle of the particle size distribution.
Process state
Grind & Particles
Advanced detail
Technical science
Definition
Median particle size is the central tendency of the ground coffee distribution and is more precise than simply calling the coffee fine or coarse.
Why It Matters
It influences baseline extraction speed, but it is only part of the PSD story.
Page Context
Median particle size is part of the Brew Supply AeroPress Wheel and helps brewers describe the middle of the particle size distribution.
Related variables
Input lever
Grind & Particles
Wheel face
Burr set
The burr geometry installed in the grinder.
Input lever
Grind & Particles
Advanced detail
Burr alignment
How evenly the burrs are aligned.
Input lever
Grind & Particles
Wheel face
Grind setting
The selected grind size setting.
Input lever
Grind & Particles
Wheel face
Grind speed / RPM
The speed at which the grinder is operated.
Input lever
Grind & Particles
Wheel face
Sieving
Separating grounds by particle size after grinding.
Affected outcomes
Measured metric
Cup Outcome
Wheel face
Beverage TDS
Measured total dissolved solids in the served beverage.
Calculated metric
Cup Outcome
Wheel face
Extraction Yield
Calculated percentage of coffee mass extracted.
Measured metric
Cup Outcome
Wheel face
Beverage Yield
The liquid beverage mass collected or served.
Cup outcome
Cup Outcome
Wheel face
Aroma
The smell of the brewed coffee.