I used an IFFYM calculator which uses a pretty standard formula to calculate calories to start off with then adapted as a monitored composition changes.
It calculated a BMR of 2980, which I rounded to 3000, I added a 300 calorie surplus and discovered no weight change over 1 month period.
Added 200 more calories for another month and found 100g increase, another 300 calories later I was gaining between 250-500g at about 3800.
Held at about this rate and managed to gain a fair few kilo's over a period of time. I haven't become overly fatty luckily, however I do realise some fat gain.
Most of my training was strength wise, so I've never measured on that basis.
Harris Benedict equation.
[TABLE="class: wikitable"]
[TR]
[TD]BMR calculation for men (metric)[/TD]
[TD]BMR = 66.5 + ( 13.75 x weight in kg ) + ( 5.003 x height in cm ) – ( 6.755 x age in years )[/TD]
[/TR]
[/TABLE]
Sedentary (little or no exercise): BMR x 1.2
Lightly active (light exercise/sports 1-3 days/week): BMR x 1.375
Moderately active (moderate exercise/sports 3-5 days/week): BMR x 1.55
Very active (hard exercise/sports 6-7 days a week): BMR x 1.725
Extra active (very hard exercise/sports & physical job or 2x training): BMR x 1.9