Your Question: what is a normal peak expiratory flow rate on a 46 year old male who is 6 feet tall?
My Humble Answer: Check out this calculator. This is basically your predicted normal peak flow or peak expiratory flow rate(PEFR).
This is the normal for a person of your age and height. However, it may not be YOUR normal. The best way to determine your normal peak flow -- better known as your PERSONAL BEST PEAK FLOW -- is to blow in your peak flow meter every morning and every evening. Whatever is the highest peak flow you blew is considered your Personal best. That is what you use to monitor your asthma.
Your Question: What isi a normal peak flow reading for an adult? I blow into it every day, but I don't know what is normal.
My Humble Answer: Actually, what is normal is dependent on you. What you'll want to do is blow in your peak flow every day for two weeks when you're feeling well, and whatever your highest peak flow is, that is your personal best. That is what you should base your peak flows on.
For more information on this, click here.
That said, you can see how your peak flow measures up against other people your age and height by clicking here.