At 86kg you need a minimum of around 2000 but how much more you need is heavily dependent upon your activity level, exercise regime, your genetics, the ratios between the foodgroups, the frequency at which you eat, the times of day that you eat...
The best way is simply to count how many you are eating now and adjust from there. Keep a diary for a week and find your daily average. If you're looking to gain muscle add about 400 or so, including some extra protein. If you're looking to lose fat reduce it by about 500, mostly from carbs.
Tracking your own intake for awhile is more accurate than any calculator can be, including my one (which is why it tracks n graphs). There's just too many variables for any one formula. "X times your bodyweight" doesn't allow for your current body composition. If you're 50% fat then you don't need so many calories but you will need some extra to shift that weight around.
If you want to add muscle quickly accept a little fat in the process. To fine-tune and balance muscle gain without adding body fat takes knowledge of your own body, not a formula.