Skip to main content

Interpretation of Results

Good lung function is important for optimum health-related fitness. Being able to breathe easily makes everyday tasks feel so much less arduous. Also, during exercise, if your lungs are in good shape you will not get out of breath so quickly.

Check your peak flow against this chart

  • Choose the red curved line, which shows what your Peak Flow should be for your sex and height. Height is given in both inches and centimetres.
  • Imagine a straight line vertically from your age at the bottom of the chart.
  • Where your vertical line crosses your red curve, imagine a horizontal line.
  • The horizontal line will cross the left axis at the predicted normal figure for your Peak Flow.
  • This is only a rough indication; many healthy people have higher Peak Flows than the chart suggests. There is a lot of variation between people.
This is a graph showing norms for peak flow measurements.


Norms and Recommendations

Males 600 - 800ml

Females 400 - 600ml