It isn't always easy to measure coffee and get the proportion of coffee to water exactly right. For a start, there are some variables. For instance, how finely ground is the coffee? The same measure of finely ground coffee will deliver a stronger cup of coffee than a measure of coarse ground coffee.
I would recommend that you use 10 grams of ground coffee per 6 oz cup. A coffee CUP (same size as a tea cup) is about 6 fluid ounces. A coffee mug contains closer to 8 or 9 fluid ounces.So how do I measure 10 grams of coffee. There are a couple of ways:
The first is to use a coffee scoop. A level coffee scoop should hold two tablespoons of coffee, which is approximately 10 grams. So you should use two tablespoons or one coffee scoop of ground coffee for every 6 fluid ounces of water.
You might want to check that your coffee scoop actually holds the right amount of coffee, as different scoop makers seem to vary their sizes. So start by using a 1 tbs kitchen measuring spoon, and make sure your scoop contains 2 tbs of ground coffee. If it doesn't, use the measuring spoon instead.
Secondly, if you want to be really precise, you can get some digital scales that are precise enough to weigh your coffee to the nearest gram, or better.
So you add...
1 coffee scoop of ground coffee for every 6 fluid ounces of water (for cups)
1 1/3 coffee scoops for every 8-9 ounces of water (for mugs)
This means that if you have an 8-cup coffee maker, you want to pour 8 x 6 ounce cups of water in the reservoir and 8 level scoops of coffee to the filter basket.If you like your coffee a little stronger, you'll soon figure out how much more coffee to add for each brew.
For instance, if you like strong coffee and make enough for 8 x 6 ounce cups, you might end up using ten 10 or 12 scoops instead of 8.
Experiment a little and see what suits your taste the best.
Just keep that coffee scoop close by. It makes it a lot easier to measure coffee, whether you are making one cup or a whole jug.
And when you do measure the ground coffee and water precisely, you'll probably be amazed by the quality of the coffee. A lot of the time people use too much water for too little coffee. The result is a weak brew that always disappoints.