There has been a lot of discussion about this. Too lazy to search the forums right now.
Basically it comes down to volume vs. weight. A gram is a metric unit of weight or mass. Please see here.
A "7 Gram Scoop" is simply an estimate, that when you fill that scoop with coffee, it should weigh around 7 grams.
Of course all coffee beans are different, humidity will always be a little different, and the fineness/courseness of the grind will be different; all of these factors will affect the actual weight.
There are some on this board who measure weight with a digital scale (especially for espresso, where this can be more crucial). Others (myself included), go by how the PF looks when it is filled, or use scoops.
It is early, so if I blundered, someone please correct me.
Posted Wed Jan 26, 2005, 12:03pm Subject: Re: how much is 7 grams of coffee
"How much is 7 grams of coffee?"
If you want the real answer, it's 7 grams.
Measuring coffee by volume will yield inconsistent brew-strengths. I know there are plenty of people out there who are fine with volume-measuring coffee, but I (and many others) have found that getting a scale to measure for a shot or a pot is the way to go.
For me, a scale means no waste (if you were to grind too much for a portafilter basket), and consistent results every time. Plus, for drip/vac/etc., a scale means no more counting scoups when you're caffeine-deprived.
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