Tracking coffee outturn from cherry to consignment

What outturn actually means

Outturn is the ratio of output to input at any stage of coffee processing. It tells you how much usable product you get from a given quantity of raw input. On a coffee estate, there are at least four distinct outturn ratios that matter — and each of them tells you something different about the health of your operation.

Most estate owners are familiar with the final outturn figure that curing works report: kg of clean bean per quintal of parchment. This is the number that shows up on the curing certificate and directly affects the price buyers pay. But by the time you see that number, the season's decisions are already made. The useful outturn data is the kind you collect during the season — batch by batch, stage by stage.

A curing outturn figure tells you what happened. Stage-by-stage tracking tells you why — and what to change next season.

The four stages of outturn

So for every 100 kg of cherry picked, a typical Coorg arabica estate might expect approximately 22 kg of dried parchment, which hulls to around 15 kg of clean bean, which consigns at around 14–15 kg net after curing deductions. That's an overall cherry-to-consignment outturn of roughly 14–15%.

This figure varies considerably by variety (robusta typically outyields arabica on a cherry-to-parchment basis), by year (rainfall affects cherry density and dry matter content), and by processing practice (pulped natural vs. fully washed vs. natural dry).

Stage 1 — Cherry to parchment (drying outturn)

The drying outturn — how much parchment you get from a given weight of cherry — is the ratio most sensitive to field decisions. It depends on: cherry ripeness at the time of picking, the pulping method used, drying bed conditions, and how long the coffee is allowed to dry.

For arabica in Coorg, expect 20–24% of cherry weight as dried parchment (roughly 4–5 kg cherry per kg parchment). A lower ratio (say, 18%) may indicate over-mature or damaged cherry. A higher ratio (26%) may indicate under-drying — the parchment still carries excess moisture and will shrink further at curing, resulting in a poor curing outturn later.

The only way to track this reliably is to weigh each batch at input (cherry going into pulping) and output (parchment coming off the drying bed). Without batch-level tracking, you can only compute this at a season level — which is too late to course-correct.

Stage 2 — Parchment to clean bean (hulling outturn)

The hulling outturn tells you what percentage of your parchment weight becomes sellable green bean. The range for well-processed arabica is 68–75%. Anything below 65% warrants investigation: common causes include over-dried parchment (which yields higher husk-to-bean ratio), high defect content, or mechanical damage during hulling.

Hulling outturn is the figure curing works use to determine your consignment value. If your estate consistently hulls above the 68% threshold that most buyers use as a baseline, you are in a stronger negotiating position. If you do not know your own hulling outturn — because you have never tracked it per batch — you are negotiating blind.

Stage 3 — Clean bean to consignment (curing outturn)

This is the outturn your curing works will report on your curing certificate: kg of exportable grade per quintal of parchment input. It reflects both the hulling outturn and the grading losses (defects removed during cleaning and grading).

A curing outturn of 48–52 kg per quintal of parchment is typical for quality arabica. Below 45 is a red flag. This number is outside your direct control at the curing stage — it reflects the quality of what you sent in. The decisions that determine curing outturn were made in the field and on the drying bed, weeks or months earlier.

Why the chain matters — and why it breaks down

The reason outturn tracking is so valuable is that it creates a chain of accountability from cherry to consignment bag. When the curing works report a poor outturn, you can trace it back: was it the hulling batch? The drying batch? A particular picking session that brought in immature cherry? Without batch-level records, these questions cannot be answered.

The chain breaks down when records are kept at too high a level — total cherry picked, total parchment dried, total consignment dispatched — without the batch linkages that connect them. This is how most estates operate, and it means that the most actionable information (which batch had low outturn, and why) is lost every season.