Peak Flow Calculator

Estimated peak expiratory flow.

Height

Age (years)

Sex

Peak flow (L/min) 959.35

Step-by-step with your numbers:

1. Values used:

2. Height = 175

3. Age = 30 years

4. Peak flow = 959.35L/min

Did we solve your problem today?

Estimated normal peak expiratory flow. For reference only — monitor with a peak-flow meter.

FAQ

What's normal?

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