I weigh 110 and was wondering how much caffeine is too much in one day?

Varies.: 5 to 10 cups at one time is going to be toxic. 5 to 10 cups during the day won't be toxic but will likely result in withdrawal if it is a habit and then stopped. In milligram that would be 300 to 600 mg at one time might be a bit much and that much daily will produce withdrawal.

Coffee: Taking one to 2 cups a day before 12 noon will be okay for adults, Can last up to 12 hours and if taking later in the day may affect your sleep