November 18, 2020
Don’t worry: no mumbo jumbo ahead! Understanding coffee-to-water ratios can simply spare you from starting the day with a bitter cup of joe or a weak-as-water carafe.
That’s why we’re going to explain it to you in an easy, no-frills way.
From one coffee lover to another.
Because coffee is. Why would you want to spoil it? By understanding coffee-to-water ratio you can avoid over-extraction, which results in a bitter pot that might be too strong for your palate, and under-extraction, a heartbreaking watery mess that’s too weak to be classified as coffee.
To calculate coffee ratios, you simply need to multiply the second number (which refers to the amount of water) for the grams of coffee that you’re planning on using.
For example, for a 1:15 coffee-to-water ratio, you need to add 15 g of water for every gram of coffee. If you use 10 g of coffee grounds, that’s 150 g of water.
Overall, the best coffee to water ratio is 1:15. If you haven’t got a scale at hand, that’s six ounces of water for every one or two tablespoons of coffee grounds.
A 1:15 ratio is a fantastic starting point but, if it tastes too strong for you, you can then tweak it to 1:16, 1:17 and so on. Too weak? Opt for 1:14 or 1:13.
However, while 1:15 is the best coffee-to-water ratio for most coffee makers, the optimal quantities change dramatically for a couple of peculiar methods.
If you’re using an automatic dripper, the best coffee-to-water ratio is still 1:15. Or you can add two tablespoons of grounds per cup of water like we do.
1:15 seems to be the best coffee-to-water ratio for French press too, but that’s if you’re grinding the beans yourself and can rely on consistent coarse grounds.
If you’re using pre-ground coffee, it’s usually a medium/medium-fine size. To balance this difference and avoid over-extraction, try 1:17 instead.
In general, the best coffee-to-water ratio for most pour over coffee makers is still 1:15. However, if you’re only just getting started with manual methods and are used to automatic drippers or French presses, be prepared because they’ll unlock more flavor nuances. If this pour over coffee tastes too strong for you, start with 1:16 or 1:17.
The best coffee-to-water ratio for cold brew is 1:5. Here’s where things start to change quite drastically! To balance its much longer brew time, cold brew coffee needs less water per gram and is therefore a lot more concentrated than traditional java.
Because it’s a highly concentrated shot, the best coffee-to-water ratio for espresso is 1:2. This is because espresso machines rely on a very short extraction time, usually around 20 seconds. Using fine grounds and a 1:2 ratio guarantees the strong shots that we need for an extra energy kick every once in a while.
If you’re making espresso-style coffee with a moka pot, a 1:6 or 1:7 ratio is the way to go. However, you don’t really need to measure it: just fill up the filter plate with grounds and pour water into the bottom chamber until you reach the valve, without covering it (unless you want a coffee with a bang… literally).
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