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How to determine extraction rate in drip coffee?
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Thecoffeenerd
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Posted Sat Feb 8, 2014, 8:52pm
Subject: How to determine extraction rate in drip coffee?
 

How can you determine extraction rate in drip brew coffee? (Included that you used enough coffee, and water) I like to get scientific with coffee!

What I've heard is that 1.5oz of water per oz of ground coffee will remain in the basket after brewing. So if you start with 4oz of ground coffee, pour 1/2 gallon of hot water over it, and measure the strength to be 1300 ppm (1.3% TDS), then the extraction is just

{[64oz water - (4oz coffee x 1.5oz water/oz coffee)] x .013}/4oz coffee ~ 19% extraction

Does this seem right?

 
"You can't make good coffee, without good coffee" -Thecoffeenerd
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