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Homeroasters - Home Roasting Coffee Community » THE ART OF ROASTING COFFEE » Roasting Coffee

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Math question
DConnolly	#1 Posted on 01/14/2016 6:48 PM
Newbie Posts: 7 Joined: January 06, 2016	How much would a roasting vessel have to hold of green beans to make a full pound of roasted coffee at the end? I would like to perhaps build my own roaster at some point, and just trying to get some info ahead of time. I'd like to be able to end up with a full pound(or as close to) of coffee. Thank you for any information. Aspiring aficionado.


BenKeith	#2 Posted on 01/14/2016 7:04 PM
Pounder Posts: 485 Joined: April 21, 2014	That's going to depend on the roast, Light roast can have 12-13% weight loss. Espresso roast can have as much as 18-19% moisture loss. I Don't roast past that point so don't know about those black beans. So, just do the math on the roast you like and add that much more green to a pound to end up with a pound of roasted coffee.


jkoll42	#3 Posted on 01/14/2016 7:57 PM
1 1/2 Pounder Posts: 860 Joined: February 14, 2011	I usually figure a pound turns into a little under 13oz once I cull any quakers or overroasted beans and figure a few beans make an escape from the RC during the roast. That would be about 20oz for a final #. One word of caution if you are trying to figure volume considerations. Some beans take up way more room per # than others. Elephant beans, monsooned, low altitude etc to leave to extra space for yourself. -Jon Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3


oldgearhead	#4 Posted on 01/14/2016 7:58 PM
1 1/2 Pounder Posts: 1128 Joined: February 10, 2011	A Pyrex Bake-A-Round will easily do the job for you. The main consideration is not water loss but bean expansion... No oil on my beans...


jkoll42	#5 Posted on 01/14/2016 8:20 PM
1 1/2 Pounder Posts: 860 Joined: February 14, 2011	Did you decide what type of roaster you are building? -Jon Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3


DConnolly	#6 Posted on 01/14/2016 8:34 PM
Newbie Posts: 7 Joined: January 06, 2016	Quote jkoll42 wrote: Did you decide what type of roaster you are building? Preferably I'd like to make a drum roaster. I'm still in the idea stages at the moment. Figuring out what materials, and personal skill/knowledge(LIMITED) I have at the moment. I know beans expand, lose moisture, and change all around. I just wasn't sure if their was a typical "ball-park" percentage I'd be looking for in weight lose. If it helps I would like to do a variety of roast degrees from light to dark, as I'm still in the learning process. Aspiring aficionado.


ginny	#7 Posted on 01/15/2016 3:42 AM
Founder Posts: 3476 Joined: October 24, 2005	really depends on the greens but I usually get a pound of roasted from a pound and a quarter of beans on average. it's a bean issue. ginny


DConnolly	#8 Posted on 01/15/2016 8:35 PM
Newbie Posts: 7 Joined: January 06, 2016	Quote ginny wrote: really depends on the greens but I usually get a pound of roasted from a pound and a quarter of beans on average. it's a bean issue. ginny Thank you! That's a good starting point to look into. Aspiring aficionado.

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