When I'm not regular running on the treadmill, my treadmill stats are incline 15, speed 4.4. This burns a 1000+ calories per hour but its VERY hard to do longer than 10 - 15 minutes, and nah, I never did it longer than 10 - 15 minutes at those numbers. When I first started going to the Gym I did do incline for an hour which burned 500 calories in a hour, I forgot the incline/speed number to get that calorie burn though.
I'm 6,1, around 200 pounds. I was 240 when I started in Nov 2017, don't give up breh