You can find individual ingredient carb counts we use in the Low Carb & Keto Food List. Net carb count excludes fiber, erythritol, and allulose, because these do not affect blood sugar in most people. We try to be accurate, but feel free to make your own calculations. Keto GT Diet Cucumbers are almost entirely water (if you want to get technical, per 1/2 cup of sliced cucumber, there are 50 grams water in 52 grams of cucumbers). Keto GT This means there is little room for anything else, so the carbs in cucumbers are extremely low.