About BeanSage
BeanSage.com publishes measured espresso guidance. Every number on this site comes from logged shots on calibrated equipment — not impressions.
BeanSage by the numbers
Current state of the project as of October 2026.
2024Founded
2Articles live
18–22%Target EY window
3+Repeats per shot
0.1 gScale resolution
| Stage | Tool | Setting | Pass criterion |
|---|---|---|---|
| Dose measurement | Calibrated digital scale | 0.1 g resolution | Within ±0.2 g of target dose |
| Yield measurement | Calibrated digital scale | 0.1 g resolution | Within ±0.5 g of target yield |
| Shot timing | Stopwatch | 0.1 s resolution | First drip to pump cut-off |
| Strength (TDS) | Refractometer | 0.01 % resolution | Duplicate readings within 0.1 % |
| Extraction yield | Computed | (yield × TDS) ÷ dose | Median of 3+ logged shots |
| Water recipe | RO base + mineral concentrate | 75–150 ppm total hardness | Same recipe across a comparison series |
| Variable changes | Single-variable protocol | One change per iteration | All other metrics held constant |
Editorial standards
Rules applied to every page before publication.
| Rule | Requirement | Enforced because |
|---|---|---|
| Numbers before adjectives | Each claim carries dose, yield, time or TDS | Flavour words alone are not reproducible |
| Repeat counts published | Minimum 3 shots per reported figure | Single shots hide grind variance |
| One variable at a time | Isolated changes only during comparisons | Confounded tests cannot assign cause |
| Equipment disclosed | Grinder, machine and basket listed per test | Results do not transfer across hardware silently |
| Corrections posted | Errors fixed with a dated correction note | Reference data must stay accurate over time |
Quick start: new readers should begin with the ratio & extraction tables, then the troubleshooting matrix, then the latest lab notes.
Coverage
Subjects in scope and deliberately out of scope.
| Subject | Status | Depth |
|---|---|---|
| Espresso ratios & extraction | Active | Full metric tables, formulas, troubleshooting |
| Grind size & distribution | Active | Particle data, WDT testing, burr comparisons |
| Water chemistry | Active | Hardness / alkalinity recipes and taste mapping |
| Pressure & flow profiling | In progress | Pre-infusion and declining-pressure series |
| Filter coffee & immersion | Planned | Ratio and temperature tables for pour-over |
| Retail bean reviews | Out of scope | Scores without logged shot data are not published |