How to grind coffee beans without a bean grinder at home? How to adjust the grinding degree of coffee?

I want to make coffee at home, but what if I don't have a bean grinder? You can choose to contact the merchant when buying beans online and say that you need to grind the beans, and then choose the appropriate grinding degree according to our coffee utensils, so the coffee powder is sent, and we can just brew it directly. Or we can go to a nearby coffee shop and ask the staff of the coffee shop to grind the beans for you, talk to them in advance about the degree of grinding they need, and then grind them. But I still suggest that I buy a bean grinder, because the freshly ground coffee beans will be more fresh and the flavor will be better.

First of all, we can make clear a general direction of the grinding degree of coffee, that is, the coffee utensils we use. The degree of grinding used by different machines is different, the degree of grinding of espresso is the finest, followed by the degree of grinding of mocha pot, and the degree of grinding of hand coffee is the thickest, which is about the thickness of granulated sugar. Then look at our coffee beans. In general, lightly roasted coffee beans require finer grinding than deep-roasted coffee beans, because they are more difficult to extract than deep-roasted coffee beans. Deep-baked beans are easier to extract, so thicker beans will taste better. If you are not sure, you can ask the seller and ask them about the recommended parameters.