Peak Flow Meter Calculator

Respiratory
1 minute

Calculate the estimated or expected peak expiratory flow.

Sex
Age
year
Height
cm
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    17 Number of calculations
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    Peak expiratory flow rate or Peak flow measurement is a quick test to measure the amount and rate of air that can be forcefully breathed out of the lungs. This calculation is useful for patients aged 5-80 years with asthma and other lung disorders.

    \text{PEF (Female)} = e^{(0.376 \times \ln(\text{Age})) - (0.012 \times \text{Age}) - \left(\frac{58.8}{\text{Height}}\right) + 5.63} \text{PEF (Male)} = e^{(0.544 \times \ln(\text{Age})) - (0.0151 \times \text{Age}) - \left(\frac{74.7}{\text{Height}}\right) + 5.48}