Degassing

Definition

Degassing is CO₂ leaving the bean after roast. Too soon and espresso pucks bloom, channel and spray; too late and aromatics fade. Light roasts often peak later (a week or more); dark roasts can be ready in a few days. Storage, roast level and dose all move the window. A rest timer is a calendar estimate, not a gas chromatograph.

Calculators that use this

• Coffee roasting

  Bean Degassing Calculator

  Estimate a peak flavour window from roast level and days since roast. Light roasts rest longer; dark roasts degas faster. A calendar, not a CO₂ meter.

• Coffee roasting

  Roasting Weight Loss Calculator

  Turn green and roasted mass into percent weight loss and yield. A crude roast level proxy: more loss usually means a darker roast.