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Objectives: To measure the Peak expiratory flow rate (PEFR)of healthy school children and to find out the correlation between PEFR values and anthropometric parameters, to create a nomogram of PEFR for children and formulate a regression formula for PEFR. Methods: A cross-sectional study was conducted on children between the age group of 8 years and 12years attending medical college hospital at Puducherry. After collecting baseline data, PEFR was measured using a mini Wright peak flow meter. The highest of three measurements were recorded for analysis. Results: Of the 1500 students screened, 1000 were included in the study. Out of which 655 were boys and 345 were girls. Significant linear correlation was seen in PEFR with height, weight, BMI and BSA (r = 0.991, r = 0.983, r = 0.775 & r = 0.987 respectively, p < 0.001). Nomograms were plotted based on the observed values of PEFR in the study population. Prediction equations were derived for PEFR for the following variants like age, height, weight, BMI, BSA, male and female are as follows PEFR = (AgeX25.667)-18.326, PEFR = (HtX4.104)-324.420, PEFR = (WtX6.883)+13.070, PEFR = (BMIX42.585)-496.875, PEFR = (BSAX287.029)-80.705, PEFR = (HtX4.094)-322.930 & PEFR = (HtX4.121)-326.935 respectively Conclusions: Significant correlation was noted between PEFR and anthropometric parameters like height, weight and BMI and BSA. Hence nomograms and formulas created can be used in the study area. [ABSTRACT FROM AUTHOR]