Newborn Baby Weight Loss / Weight Gain Calculator

A simple app to calculate newborn baby weight gain and loss, in kg/g. Are you a midwife, health visitor, paediatrician, nurse, or doctor? If so, you're probably using a calculator to work out newborn baby weight gain/loss. Of course, it's doable but let's face it, you're trying to do this while the newborn may be crying, or the new parents are looking at you anxiously!