It is easy to tell how sweet or dry a wine is. The perceived sweetness (XD, D, M, MS, S) ranges from extra dry to sweet. You can also find the sweetness of wine and lab-tested sugar content on store shelf tags.
Extra Dry (XD) 0-10 g/L sugar, depending on acidity
Dry (D) 5-17 g/L sugar, depending on acidity
Medium (M) 17-37 g/L sugar
Medium-sweet (MS) 37-45 g/l sugar
Sweet (S) 45 or more g/L sugar