How to calculate husbands calorie needs.

Hey guys. I need some advice. I am trying to calculate my husbands calorie needs. I am trying to figure out what to put as far as his activity level. Moderate, Very or Extra. He just started a job as a logger and I want his calories to be sufficient what do you think I should put? (I am using a diffrent calculator than MFP). I want to make sure he is getting enough.