Bay Calculator for best percentile growth calculator

The calculation process involves three steps: First, we find the reference data for your baby’s exact age using linear interpolation between data points. Second, we compare your baby’s actual measurement to these reference percentiles. Third, we calculate a Z-score, which represents how many standard deviations your baby’s measurement is from the median (50th percentile). A Z-score of 0 means exactly average, +1 means one standard deviation above average (approximately 84th percentile), and -1 means one standard deviation below (approximately 16th percentile)