The sugar listing on a food label is somewhat deceiving for it includes "added sugar" but also the sugar in fruit, dried fruit, and milk and yogurt, etc.
I really like this PDF from the USDA which lists the "added sugar" in over 2000 foods. www.nal.usda.gov/fnic/foodcomp/Data/add_su
I think it can manually help you determine how much sugar you are getting.
The recommendation is no more than 6-7 teaspoons daily, which would be about 24-28 grams.
Let me know if you need more help with this.