How many coffee beans can be roasted from 1kg of green coffee beans?

1. Introduction

Coffee is one of the most popular drinks in the world, and roasting coffee beans is one of the key steps in making delicious coffee. However, many people may not know how many coffee beans can be roasted from 1kg of raw beans. This article will discuss this issue.

2. Green coffee beans and roasting losses

Before we start calculating, we need to understand an important concept: roasting loss. When green beans go through the roasting process, their weight decreases due to the volatilization of moisture and other chemicals. According to empirical data, the average loss in medium to dark roasting is about 15%.

3. Theoretical calculation

Assuming we have 1kg of green beans and calculate based on an average loss of 15%, the actual amount of coffee beans that can be used for brewing or selling is:

(1 - 0.15) * 1000g = 850g

4. Realistic considerations

However, in practice, not all coffee beans can be roasted to perfection. Sometimes, there are some undesirable situations, such as over-roasting or uneven roasting. Therefore, these factors need to be taken into account when calculating the number of usable coffee beans.

5. Roasting degree and coffee bean volume

In addition to weight loss, roasting also affects the volume of coffee beans. Generally speaking, lightly roasted coffee beans are fluffy and light, while darkly roasted coffee beans are relatively compact and heavy.

Since the volume change cannot be calculated accurately, and there are differences in the processing of green beans of each variety and origin, it is difficult for us to give an accurate number. However, based on empirical estimates, adjusting the average loss of 15% can give a relatively reasonable range.

6. Other factors

In addition to the factors mentioned above, there are other factors that may affect the amount of coffee beans that can be brewed or sold:

- Coffee bean variety and origin

- The skill level and experience of the baker

- Performance and stability of baking equipment

These factors will affect the loss rate during the baking process and need to be comprehensively considered in actual operations.

7. Conclusion

In summary, about 850g of coffee beans can be roasted from 1kg of green coffee beans. However, in actual operation, the specific amount may vary due to factors such as roasting loss, roasting degree, and variety. Therefore, when conducting commercial operations or home brewing, it is necessary to make adjustments based on the specific situation and combine your own experience to determine the best solution.

8. References:

[1] Coffee Roasting Loss: Starbucks Menu What is it and how to calculate it? - Perfect Daily Grind, https://www.perfectdailygrind.com/2019/06/coffee-roasting-loss-what-is-it-and-how-to-calculate-it/