Quote (SDGoD @ Jun 15 2017 05:46am)

Dieting & bulking is quite simple math.

1) Figure out your daily maintenance (you can use estimations as a base & fine-tune it with experience)
2) Add 500kcal to it & eat that much every day. Example: Maintenance is 2500 kcal. You also burn 500 kcal / day by working out (on top of your counted maintenance). You need to eat 3500 kcal to get 500 surplus.*
3) You'll now gain half a kilo / week

*Note, some maintenance counters INCLUDE estimation of work-out calorie burn. Be extra careful to not count them twice or you'll end up gaining mass fat.

Obviously if you burn 500 extra calories on treadmill you need to eat 500 calories more.
Same applies to gym. It's all about estimation but you'll notice in a week or two if your diet is working.
Work out & aim to get correct rations of macros instead of just eating pizza all day for the calories.

The more calorie surplus you add, the more %% of mass gains will be FATinstead of muscle.
500kcal / day surplus is pretty much the max you should aim to. Most people go between 200 - 500