I think a good guide is that the liver takes up something like 70g and the muscles around 200g. Now, we never actually deplete glycogen stores completely, but after some serious hard work, carbohydrates seem to be helpful, while a similar carbohydrate load on a more sedentary day leads me into the roller-coaster ride of crankiness, where I end up with low blood sugar and brain fog (that bag of dried dates seemed like a good idea at the time, especially since I was walking).
So it is easy enough to point to 100-150g as a safe range, with additional carbs acceptable contingent on some serious physical work having happened. I'd like to point out too, that it isn't a good idea to be totally steady state on this stuff. Ketosis once in a while is a good thing- it probably happened pretty often to our ancestors. I usually eat a good amount of protein, for instance, but I like to have a day or so without any for autophagy- my point being, allow evolutionarily sensible variations of macro-nutrients in your diet.
I am also assuming you are at your target weight here; if not, keep them sub-100g and maybe even lower for ketosis is definitely your friend if you are trying to lose weight. You could check out the Shangri-La diet too (which is really a technique, not a diet).