It adds the sugar you put in tea and coffee, other drinks and cooking, and takes a level teaspoon as 5 g, the serving size on our pack. Calories use the standard 4 kcal per gram of sugar. A month is counted as 30 days and a year as 365 days. For drops, a 15 ml bottle is estimated at about 300 drops, so your actual number of bottles may differ a little.
These are estimates of how much you would use, not dietary advice. Sugar already inside packaged food and drinks is not counted.