Normal readings of peak flow meters depend on a person's age, sex, and height. For example, a 30 year old male that is 5'10" tall should have a reading close to 622 liters per minute. Check the charts below for normal peak flow values (click on images to enlarge). Normal readings of peak flow meters are within 80-100% of the baseline reading. Predictive Normal Values have been calculated for women and men of different ages and heights, and have been adapted (with agreement from the original Authors) for use with the new EU Scale / EN 23747 peak flow meters.
Women can have peak flow values as low as 80 liters/minute less than the average value shown and still fall within the normal range. To calculate a "normal" value for a healthy person of a given age and height, follow this link. Peak flow meters come in two ranges to measure the air pushed out of your lungs. A low-range peak flow meter is for small children, and a standard-range peak flow meter is for older children, teenagers and adults. An adult has much larger airways than a child and needs the larger range. There are several types of peak flow meters available.
■ Or in the case of a male aged 27 with a height of 186 cm. His predicted peak flow value would be 639.948 L/min. But if he already has a measured peak flow of 568 L/min, the percentage is 88.76. 1) Nunn AJ, Gregg I. (1989) New regression equations for predicting peak expiratory flow in adults. A chart called a ‘nomogram’ can be used to estimate your predicted peak flow if you are male or female, your age and height. It is important to remember that everyone is different and you should be guided by what is normal for you. Measuring your peak flow when you feel well will establish your normal or best peak flow.