If you can figure out the model number of your machine it will help us guide you better as different machines have different capabilities.
It depends what you are trying to do to the coffee. By "fully extracted" are you just trying to get your money's worth out of every bean, or are you trying to achieve the best quality shot? Pretty much everyone on this forum is only interested in quality, and I'm going to answer assuming that's what you want.
Coffee extraction is all about brew ratios. Weight of ground coffee in to weight of liquid coffee out.Just wondering how many ML to fully extract a shot of coffee?
also if i were to do a double shot, is it as simple as doubling the amount of ML drips of coffee
Different methods use different ratios. Espresso is usually in the range of 1:1 to 1:3, 'standard' espresso is about 1:2. So it depends on how many grams you're putting in. The old way was to measure the volume (ml) of coffee out but the more common way now is weight. By the old standard a single shot was 7-9g of ground coffee in to 25-35ml out in 25-35s. A double shot is 14-18g in to 50-70ml out. Now we would say a single is 7-9g in, 14-18g out, a double is 14-18g in, 28-36g out. (These are guidelines though as taste overrules everything.) Same ratio but double the amounts. Please note that you should not use the same filter basket to do a single and a double shot. Different baskets will have a range of weight of ground beans that they work best in. For example my Breville Dual Boiler comes with a double basket that works best when dosed with 18-19g of ground coffee. Many machines come with different baskets for single and double shots.
In terms of extraction, you could get more out but it would taste worse. Generally speaking when measured scientifically the extraction percentage should be around 30% I think (but I'm wrong! see TampIt's info below). So a long way from "fully extracted"! Think about it in terms of getting ideas out of a group of people. The first couple of ideas probably won't be any good, then there'll be a bunch of good ideas, and then after a certain point all their good ideas are gone and you could keep forcing them to give you more ideas but they would be terrible ideas. The flavours you get out of coffee work in a similar way. Just because more brown is coming out doesn't mean it should be going in your cup!i usually drip 100ml however the colour of the coffee still drips a little brown. am i right to assume that i have not fully extracted a shot of coffee?
I have no idea, but I doubt it. I've been drinking at least two shots of coffee a day for a few years now, but I forget the rest of that story. EDIT: Apparently I also forgot the extraction percentage.also is it true that if you drink 2 shots of coffee a day, it will improve your memory?