1.5 months and results are inaccurate to what the calculator

tstarfly

Hi I am so frustrated. I am 5'6" and weigh 142 ish. I have been working out and eating right for about a month and a half consistently and all i have lost is about 3 pounds. I have lost an inch off my waist. Everyday when i finish my calculations it says in 5 weeks i will weigh 135 however i am about 7pounds off. Does anyone else see the inaccuracy like this??

Now with two weeks til my vacation i am having to eat only 1000 calories and workout for an hour a day to see any results. This is so frustrating. Please advise!!