Im on a portion controlled lactovegetarian diet which i include 45 minutes of cardio 5 times a week to burn 700 calories per session(i assume that the readings on the machine are precise,although some may disagree) and i do hathayoga,pilates & kickboxing on selected days.I walk daily from the subway station back home each time i go out somewhere(20-25 minutes).Up to how many calories can my body burn (at least a sensible estimation will do)when im out of the gym?

I only drink water and green tea and have no passion for sweets and fried foods,including chips and carbonated drinks. The most i may indulge every 3 or 4 days is 20g or less of dark chocolate.I drink 500ml of fortified lowfat milk daily.My main source of fibre is instant oatmeal(35g for breakfast and another 35g for dinner) which is very filling when eaten with veggies and fruits.Im just wondering up to how many calories can the average human body burn when they are not at the gym?Thanks in advance