There is no set in stone number of uses for the refill. This totally depends on the quantity of the refill. The more the quantity, the more uses the refill will take before emptying out is the most obvious understanding. But then again this also depends on the adjustment unit of the amount dispensed for each use. So, to not use up the whole bottle in one day, try to make sure this dispensable amount is just as much as it is needed. Too much and this would lead to wastage whereas too less can lead to bad hygiene.