Asthma Zone Calculator
Your Results
Here are the peak flow values for your different asthma zones.
Your Green Zone is above percent. (80 to 100 percent of your personal best)
What the Green Zone means:
The Green Zone is a sign that your asthma is in good control. It means you currently have no symptoms of asthma. You should continue to take your medication as usual.
Your Yellow Zone is below percent. (50 to 79 percent of your personal best) liters/minute.
What the Yellow Zone means:
The Yellow Zone is your caution signal. It means you need to take your quick-relief medicine from the instructions on your written asthma plan of action. The Yellow Zone also means your asthma may not be in good control. Ask your doctor if you need to change or increase your daily medications.
Your Red Zone is anything below percent. (Less than 50 percent of your personal best)
What the Red Zone means:
The Red Zone is your emergency signal. Take or increase your quick-relief medicine immediately, according to the instructions on your written plan of action. Then, call your doctor to find out what to do.