So you want to know how many coffee beans to grind and what the whole bean to ground ratio is? Then this article is for you. I will talk about various rations that you need to know and why it is important.
In fact, you can bookmark this page for reference.
If you are in a rush – here is the answer to the above posed question. The whole bean to ground ratio is 1:1. What this means I’ll explain later.
Whole Bean To Ground Ratio – How Much Does A Single Coffee Bean Weigh?
- 1 Whole Bean To Ground Ratio – How Much Does A Single Coffee Bean Weigh?
- 2 What Is The Ground Coffee To Whole Bean Volume Ratio?
- 3 How Many Coffee Beans To Grind?
- 4 How Many Grams Of Coffee Are In A Cup?
- 5 How To Measure Coffee Beans
- 6 Frappé-ing It All Up – The Whole Bean To Ground Ratio!
As I stated above, the whole bean to ground ratio is 1:1 or 100%, which is curious. When you look at a whole bean, it is much larger than a pile of grounds no matter how coarse or how finely ground they are.
This is the same no matter which grinder is used or which technique to grind the bean. I tested this with a flat blade grinder, a conical ceramic burr grinder, a conical metal burr grinder, a hand grinder and a good old-fashioned mortar and pestle using a bean from the same bag of whole beans.
After weighing, 500 beans each from 20 different packs of whole beans, I found the average weight of a single coffee bean is 0.1325 grams (132.5 milligrams), which is 0.0046738 ounces.
Yes, 10,000 beans were weighed and recorded. I’m a geek for accuracy like that and had my staff at my coffee shop in Vietnam do the task during downtime and bring me the recorded results on a spreadsheet.
To find if there was a difference in the weight of whole beans and ground beans as a ratio, we ground them in a series of different grinders which were fully cleaned before the test to remove old grounds, dust and coffee grounds from beans that are in the grinders.
We ground 100 whole beans at a time from the same bag of whole beans in each of the 5 different grinders. We repeated this process for all 20 bags of coffee of various roasts and noted the results.
The result was that the weight of a ground coffee bean is the same as the whole bean. This means that the whole bean to ground bean ratio is 1:1
Coffee curiosity: What is a coffee scale used for?
What Is The Ground Coffee To Whole Bean Volume Ratio?
To find what the volume of ground coffee beans to whole coffee beans ratio is we filled a cup of coffee beans from each coffee bag and ground them in each of the 5 different grinders. Again we fully cleaned the grinders for accuracy purposes.
The result was that each time we ground a cup of whole beans we ended up with a cup full of ground beans every single time.
This test we repeated for a very fine grind, coarse grind, a medium grind and as large a grind as we could. No matter how small a grind size or how coarse the end result was still the same – we ended up with a full cup of grinds.
There was no excess and no missing grinds no matter what bean or grind size we used.
We found a ratio of 1:1 for the ground coffee to whole bean volume ratio.
Coffee curiosity: Why are coffee scales so expensive?
How Many Coffee Beans To Grind?
With this information, we can determine how many coffee beans to grind and we can deduct that is does not matter so much if you weigh your beans before grinding or after grinding. You can also take the average weight of each bean and calculate how many beans you need.
Let’s say you are making a pour over coffee at 360ml (360 grams of water) at a 1:12 coffee to water ratio. You will need 30 grams of coffee (360/12 = 30).
With a scale, you can weigh out 30 grams or count 30 / 0.1325 = 226.4 beans.
This not a technique that we at Latte Love Brew recommend you use due to a lack of accuracy over all as counting the beans is only an average weight and not an exact weight. We suggest that you weigh your coffee grounds while ground right before you start brewing. The end result will be much better.
However, if your scales are broken or you have no access to scales, you can use the average weight of bean as a back up.
How Many Grams Of Coffee Are In One Tablespoon?
This is a very good question, and much easier to run as a test. For the purpose of this experiment, we have taken the question as “how many grams of coffee are in one tablespoon of ground coffee?”
In this test we used varying grind sizes of the largest most coarse grind we could and the finest grind possible for each grinder. We split our coffee beans into two groups in which they fell, dark roast and light roast.
For accuracy, we tested 2 tablespoons of ground coffee for each bag of coffee beans for each grind size.
The result was very interesting. On average, there are 5 grams of ground coffee for one tablespoon of light roasted coffee, independent of grind size.
For dark roasted coffee, there is an average of 7 grams of coffee per tablespoon, again independent of grind size.
This indicates there is a greater density in dark roasted beans and highlights why it is much better to use a digital coffee scale for weighing coffee.
How Many Grams Of Coffee Are In A Cup?
In terms of volume, one cup full of coffee beans will result in one cup of coffee grounds, regardless of the roast, grind size or the beans used. This is a test that we ran extensively.
How many grams of coffee are in a single cup of coffee is something that is difficult to give you an exact answer to as it depends on two factors; the size of your cup of coffee and the coffee to water ratio used to brew your coffee, which is often associated with the brewing method.
Let’s run a few examples to answer this question accurately.
A typical cup of pour over coffee at a 12 ounce sized cup and coffee to water ratio of 1:12 will use 30 grams (1 ounce) of coffee.
A cold brew coffee, 12 ounce cup size and a 1:8 ratio will use 45 grams (1.5 ounces) of coffee. A single or double shot of espresso, depending on the ratio used, be it 1:1.5 or 1:2 ratio, will have 7 to 14 grams of coffee.
How To Measure Coffee Beans
There is absolutely no doubt that best way for you to measure coffee accurately is to use a coffee scale. The small investment is worth it as you will be weighing both the coffee grounds and the water used.
Your investment will pay for itself in a perfect Cuppa Joe every single time you make one. As each bean is different in its density, not only varying due to the roast, they vary from place of origin and each bean tastes different and has its own flavor characteristics and profile.
To get the most value, in terms of taste, you will need to weigh your grounds using a coffee scale. It would such a shame to invest in great single origin beans and use too few grounds and not get the full flavor from the beans. It would be pretty bad if you used too many grounds and got too strong a flavor from them.
To correctly weight your grounds – which is the best way, when compared to weighing the whole beans simply place a small container on your scales, press tare to zero out your scales, so they do not include the weight of the container.
Now weigh your grounds and when you have the exact amount that you need, you can then brew and enjoy your coffee.
This is entirely the most accurate way of weighing your beans and getting consistently great coffee.
Frappé-ing It All Up – The Whole Bean To Ground Ratio!
The whole bean to ground ratio is 1:1 when measured by weight and volume regardless of which grind size or which type of grinder you are using.
10 grams of whole beans will be 10 grams of ground beans and a cup full of coffee beans will be an equal cup of grounds.
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