Peak Flow Meter Calculator for Asthmatics
Peak flow meters are essential tools for managing asthma. They help you monitor your lung function and understand your asthma severity. Our peak flow meter calculator for asthmatics provides instant results and expert insights.
- Enter your age, gender, and height.
- Input your peak flow reading (L/min).
- Click ‘Calculate’ to get your results.
The calculator uses the following formula to estimate your predicted peak flow:
Predicted Peak Flow (L/min) = (Height (cm) - 100) * 0.0375 + (Age - 18) * 0.0256 + (Gender * 0.012)
Gender: 1 for male, 0 for female
| Age | Gender | Height (cm) | Peak Flow (L/min) | Predicted Peak Flow (L/min) |
|---|---|---|---|---|
| 35 | Male | 175 | 450 | 482.5 |
| Peak Flow Category | Description |
|---|---|
| Green (Normal) | Peak flow above 80% of predicted |
- Regularly monitor your peak flow to track your lung function.
- Keep a peak flow diary to help you and your doctor manage your asthma.
- Consult your doctor if your peak flow is consistently low or drops suddenly.
What is a peak flow meter?
A peak flow meter is a small, handheld device used to measure how fast you can blow air out of your lungs.
For more information, see the NHLBI’s guide on peak flow meters and the AAFA’s peak flow meter guide.