Health

Peak Flow Calculator

Estimated peak expiratory flow.

Height

Age (years)

Sex

Calculated Output

Peak flow (L/min) 959.35

Step-by-Step Breakdown

1. Values used:

2. Height = 175

3. Age = 30 years

4. Peak flow = 959.35L/min

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Frequently Asked Questions

What's normal?

Depends on age, height and sex — compare to your personal best.