Log a measurement. See exactly where your child stands on WHO growth charts. Catch concerns early — with clinically grounded tools any parent can understand.
Features
Clinical-grade tools made simple for everyday use — no medical degree required.
Weight-for-age and height-for-age charts plotted against WHO standard deviation bands — the same charts paediatricians use.
Our LMS-based calculation engine computes exact z-scores and percentile ranks for every measurement, automatically.
Simple trajectory views help parents understand how recent measurements are changing over time.
Generate professional PDF reports with full chart history and statistics — perfect for paediatrician visits. Premium feature.
Clear visual flags help families notice measurements that should be discussed with a pediatrician.
Your child's data is encrypted, stored in a private self-hosted database, and never sold. Full GDPR data export and deletion.
Free Calculators
Everything from weight percentile to adult height prediction. All free, all clinical-grade, all based on WHO standards.
WHO weight-for-age percentile and z-score
Height-for-age for boys and girls 0–19 yrs
BMI-for-age percentile and weight category
HC-for-age percentile for 0–5 years
Adjusted age for premature babies
Mid-upper arm circumference screening
Rate of weight and height gain over time
EDD by LMP or conception date
Prenatal weight estimation
IOM guideline-based tracking
WHO charts for 1–3 year olds
Composite weight/height/BMI assessment
US-standard percentile for 2–20 yrs
Khamis-Roche height prediction method
Full reference table by month
How it works
Add your child's weight and height. GrowChart instantly plots them on WHO standard charts, calculates z-scores, and flags any concerns.
See it in action
Real WHO percentile charts, z-score tables, and AI insights — all in one place.
Every measurement is plotted against WHO standard deviation bands. You'll see exactly which percentile your child is tracking — no guesswork.
Not just a chart — see the precise z-score and percentile rank for every measurement. Colour-coded so you instantly know if values are in the normal range.
Generate a polished, clinical-grade PDF with full chart history, z-scores, and growth statistics — ready to share with your paediatrician.
Ask anything about your child's growth in plain language. The AI responds with context from your child's actual measurements and WHO standards — no medical jargon.
AI-powered insights
Get instant, contextual answers about your child's measurements — powered by Claude AI and grounded in WHO standards.
Pricing
GrowChart costs less than one pediatric appointment — and gives you everything Huckleberry and BabyConnect charge 2–4× more for.
| 🏆 GrowChart Premium | Huckleberry Plus | BabyConnect | Huckleberry Premium | |
|---|---|---|---|---|
| Price / year | $29 | $59 | $60 | $120 |
| WHO growth charts | ✓ | ✗ | ✓ | ✗ |
| AI Growth Advisor | ✓ | ✗ | ✗ | ✗ |
| PDF reports | ✓ | ✗ | ✗ | ✓ |
| Multi-child tracking | ✓ | ✓ | ✓ | ✓ |
| Preterm / corrected age | ✓ | ✗ | ✗ | ✗ |
| Clinic / pro tier | ✓ | ✗ | ✗ | ✗ |
| Local pricing | ✓ | ✗ | ✗ | ✗ |
GrowChart Clinic gives you branded PDF reports, DGHS/EPI schedule alignment, multi-staff access, and a dedicated patient dashboard — all for $99/year per practitioner.
FAQ
We use the official WHO Child Growth Standards (2006) and the WHO Growth Reference (2007) for children aged 0–19 years. The same charts used by paediatricians globally.
Yes. GrowChart is self-hosted — your data never passes through third-party analytics platforms. We are fully GDPR compliant and you can export or delete your data at any time.
A z-score (or standard deviation score) tells you how far your child's measurement is from the WHO median for their age and sex. A z-score between -2 and +2 is considered normal.
Free accounts support 1 child. Premium accounts support up to 5 children, and Clinic Pro supports unlimited patient profiles.
Yes, you can cancel anytime from your Billing Portal. You'll retain access until the end of your current billing period.