Search Ctrl K
Home / Tools
THE FEUTEX TOOLKIT

Coffee Grinder Retention Measurement

Measure apparent retained coffee over repeated grind doses and quantify purge consumption.

Cooking workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaApparent net retention = input-output; Average net retention per dose = (input-output)/doses; Monthly purge consumption = purge*uses

Made for real tasks

  • Measure apparent retained coffee over repeated grind doses and quantify purge consumption.
  • Compare an alternative set of measurements without uploading personal data.
Explore step-by-step workflows →

Worked example

Inputs

Beans put through grinder
100 g
Ground coffee collected
96 g
Test doses
5 doses
Purge coffee per use
2 g
Uses per month
60 uses

Expected results

Apparent net retention
4 g
Average net retention per dose
0.8 g
Monthly purge consumption
120 g

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter beans put through grinder, ground coffee collected, test doses, purge coffee per use, and uses per month in the displayed units.
  2. Calculate and use each labeled result for coffee grinder retention measurement. Compare the result with a measured sample before committing materials.

Try this example

{
  "input": 100,
  "output": 96,
  "doses": 5,
  "purge": 2,
  "uses": 60
}

Accuracy and scope

Negative retention can occur when old grounds are released; this is a mass balance, not particle-size or extraction analysis.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.