Welcome aboard the keto train Everyone's body is different, so there's no set time frame for entering ketosis. Some people take a few weeks, others can take a month or more. I will tell you that if you stick with the plan, you will see weight loss. I have lost 23 pounds eating this way, and many people have lost a great deal more. Give your body time to adjust Also,, the minor calorie fluctuation shouldn't affect it too much. Personally, I focus more on making sure my macros are met, and less on the calories, although most days I come in under my calorie goal. One thing you'll find as you get into the keto routine is that your appetite is much more satiated eating this way.