Numbers stay in your browser. This tool does not send form entries to a server or store them. No analytics is added by this update.
The arithmetic
Target beverage mass equals dry coffee dose multiplied by your chosen ratio. Actual ratio equals measured beverage mass divided by dry coffee dose. For an illustrative 18 g dose and 1:2 ratio, target yield is 36 g. These numbers describe mass, not beverage volume.
Ratio is not extraction yield
A 1:2 brew ratio is not a laboratory measurement of how much soluble coffee was extracted. The calculator has no dissolved-solids reading, temperature measurement or taste assessment. Do not interpret its output as proof of under-extraction, over-extraction or pump health.
Keep the machine comparison separate
Record the basket, grind setting and shot time alongside the dose and yield. If the machine stops delivering water, leaks or makes an abnormal sound, leave recipe adjustment and follow the fault guide. Never loosen a pressurized portafilter to obtain a missing measurement.