Clinical-grade calculators for parents and paediatricians. All tools use official WHO Child Growth Standards (2006) and WHO Growth Reference (2007).
Check your baby's weight against WHO standards. Get exact percentile, z-score, and growth classification for ages 0–5 years.
Weight-for-age → Most usedCalculate your child's height percentile using WHO growth reference. Works for boys and girls from birth to 19 years.
Height-for-age → Most usedCalculate BMI-for-age percentile and z-score. WHO classification including underweight, healthy weight, overweight, and obesity.
BMI-for-age →Measure your baby's head circumference against WHO standards. HC-for-age percentile and z-score for infants 0–5 years.
HC-for-age →Calculate growth rate between two measurements. See how fast your child is growing in weight or height per month.
Growth rate →WHO growth charts for toddlers 1–3 years. Weight, height, and head circumference percentiles for the critical toddler phase.
1–3 years →Multi-point trend analysis: enter 3+ measurements to see z-score trajectory, velocity, and whether growth is stable, accelerating, or faltering.
Trend analysis →Combined growth assessment: weight, height, weight-for-height, and BMI in one tool. WHO composite growth score.
Composite score →Complete WHO reference charts. Median, -2SD, and +2SD values by month for boys and girls 0–60 months.
Reference chart →Calculate estimated due date (EDD) based on LMP or conception date. Shows current gestational age and trimester.
Pregnancy dating →Track pregnancy weight gain against IOM guidelines. Week-by-week ranges based on pre-pregnancy BMI.
IOM guidelines →Estimate fetal weight percentile by gestational age. INTERGROWTH-21st and Hadlock standards for prenatal assessment.
Prenatal →Calculate corrected (adjusted) age for premature babies. Essential for accurate growth assessment of preterm infants.
Preterm correction →Mid-Upper Arm Circumference assessment for malnutrition screening. WHO MUAC z-scores and cut-offs for 6–59 months.
Malnutrition screening →CDC growth charts for children 2–20 years. Percentiles and z-scores based on CDC 2000 reference, standard in US practice.
US standard →Predict your child's adult height using the Khamis-Roche method. Based on current height, weight, and parental heights.
Height prediction →