Calculating Peak Flow Meter Normal Range

Calculating peak flow meter normal range is crucial for managing respiratory conditions. It helps monitor lung function and adjust treatments accordingly.

1. Enter your age, gender, and height.
2. Click ‘Calculate’.
3. View your results and chart.

The calculator uses the following formula to estimate normal peak expiratory flow (PEF):

PEF (L/min) = (Height (cm) – 100) * 0.035 * 25

For males, multiply the result by 0.89. For females, multiply by 0.93.

Case Studies

Age	Gender	Height (cm)	Calculated PEF (L/min)
35	Male	175	525
28	Female	160	420
55	Male	180	540

PEF Comparison: Smokers vs. Non-Smokers

Age	Smokers (L/min)	Non-Smokers (L/min)
20-29	480	520
30-39	450	490
40-49	400	450

• Regularly monitor your PEF to track lung health.
• Smoking cessation can significantly improve PEF.
• Consult a healthcare professional for personalized advice.

What is peak expiratory flow?

Peak expiratory flow (PEF) is the maximum speed at which a person can exhale.

Why is it important to monitor PEF?

Monitoring PEF helps track lung function, detect respiratory issues early, and adjust treatments as needed.

Learn more about PEF from NHLBI

Read a study on PEF from the American Thoracic Society