Rules for holding doors


I wonder when I am considered rude when deciding not to hold a door to the person behind me when entering a building? What is the distance under which it is not acceptable not to hold the door?

Those are the measurements for me:

Average 10 feet

Person looking at his phone – 5 feet
Person walking fast behind me – 15 feet
Person looking desperately at me -20 feet
Mom with a stroller – 25 feet
Senior – 30 feet
friend – 35 feet
Family – 40 feet
My boss – 45 feet
Young Good looking girl – 53 feet