Lemonade has 27 kcal and 6.9 g sugar per 100 g. A 250 ml glass packs ~17.3 g sugar — most of the calories come from sweetening, not lemons. Homemade with less sugar tracks lower; "diet" versions use non-nutritive sweeteners.
How should I track Lemonade-flavor drink, powder, prepared with water?
Liquid calories from Lemonade-flavor drink, powder, prepared with water are easy to overlook because drinks do not trigger the same fullness signals as solid food. A meta-analysis (Wehling & Lusher, Am J Clin Nutr 2021) confirmed that people underreport beverage intake more than solid food. Most people pour 30–50% more than the label serving size without realizing it. Use a kitchen scale to weigh your glass or bottle once — you will know your exact pour going forward. This one calibration step can save you from hundreds of untracked calories per week.