BMR + step calories on pedometer

cazziecoo

Hi I have been going off MFP's calorie reccomendations to lose 1lb a week however it is not working that well for me, I think the reason for this is that some days/weeks I am a sedentary and others I am lightly active/ active as I have days off sat around and shifts at work on my feet for 8 hours other days.

I couldnt afford a fitbit but I bought a pedometer which also calculates calories burnt based on your data. Would it be a good idea to set my activity to sedentary every day and then manually add in the calories I burn during the day by my steps? Would that lead to a more accurate calorie goal day by day?