Last week we were working through some drum capacity calculations and it was interesting to see the common full coffee bag sizes laid out by origin. Take a look.
| Bag size in kilograms | Bag size in pounds | Origin |
| 45.45 kilograms | 100 pounds |
Hawaii Puerto Rico |
| 50-60 kilograms | 110-132 pounds | India |
| 60 kilograms | 132 pounds | Brazil Ethiopia Indonesia Kenya Vietnam |
| 69 kilograms | 151.8 pounds | Guatemala Mexico Peru |
| 70 kilograms | 154 pounds | Colombia |
There is, of course, outliers to these numbers above and half-bag sizes, too - like our 35 kilogram half bags available from Colombia producer, Forest Coffee. But its still interesting and if someone has time, they should take a closer look at that 69 kilogram size and let us know how that came to be.
Our roaster lineup at Mill City Roasters is based on a 60 kilogram bag size to catch that broad middle of the road bag size that is more common across origins. When you invert a 60 kilogram bag across our line-up, this is where the numbers fall.
| Roaster Drum Capacity | Fraction of 60 kilogram bag |
| 500 gram, MCR500 | 1/120 |
| 1 kilogram, MCR-1 | 1/60 |
| 2 kilogram, MCR-2D |
1/30 |
| 3 kilogram, MCR-3/3D | 1/20 |
| 6 kilogram, MCR-6 | 1/10 |
| 10 kilogram, MCR-10 | 1/6 |
| 15 kilogram, MCR-15 | 1/4 |
| 20 kilogram, MCR-20 | 1/3 |
| 30 kilogram, MCR-30 | 1/2 |
| 60 kilogram, MC-60 | 1 |
