Most of the calculators are only accurate for a few days to a week until the next difficulty change. Plus nobody knows how the BTC price is going to move.... If you had said this comment 3 months ago you would have be so mistaken. China rejecting bitcoin is a blow but not yet the end. The price is steadily falling as people try and get in and out at the highest levels....It is making new lows and not making new highs....at some stage the scale will tip but at what level is anyones guess...$500----$400---$50! Bitcoin is only the beginning of Crypto currency....It can't be deinvented....There will be more alternatives springing up that may eventually takeover.. The next few months will be critical to the survival of all Crypto currencies....