Baby Weight Percentile – Kalkulačka
Použijte Baby Weight Percentile – Kalkulačka pro rychlé a přesné výsledky.
Jak používat tuto kalkulačku
- Zadejte Age (months)
- Zadejte Weight (kg)
- Zadejte Sex
- Klikněte na tlačítko Vypočítat
- Přečtěte si výsledek zobrazený pod kalkulačkou
Understanding Baby Weight Percentiles
A weight percentile shows how your baby's weight compares to other babies of the same age and sex. A baby at the 50th percentile weighs exactly average; the 75th percentile means heavier than 75% of peers.
Percentiles are based on WHO Child Growth Standards, which represent optimal growth for children worldwide. Healthy babies can fall anywhere from the 3rd to 97th percentile — the trend over time matters more than any single measurement.
WHO Growth Standards
The World Health Organization developed growth standards from a large, multi-country study of children raised under optimal conditions (breastfed, non-smoking households, good healthcare). These standards represent how children should grow, not just how they typically do.
- Normal range: 3rd to 97th percentile
- Concern below: Below 3rd percentile (underweight)
- Concern above: Above 97th percentile (possible overweight)
Always consult your pediatrician — they track multiple measurements over time using growth charts.
Factors Affecting Baby Weight
Many factors influence a baby's healthy weight:
- Genetics: Parental size is the strongest predictor of a child's growth trajectory
- Feeding method: Breastfed and formula-fed babies may grow at different rates
- Gestational age: Premature babies are plotted on adjusted age charts
- Health conditions: Some illnesses can temporarily affect growth
One measurement rarely tells the full story. Consistent tracking at regular checkups gives the best picture of healthy development.
Frequently Asked Questions
Is a high percentile better than a low one?
No — there's no 'best' percentile. A baby consistently at the 10th percentile who is healthy, feeding well, and growing steadily is perfectly normal. What matters most is a consistent growth curve, not the absolute percentile number.
Should I worry if my baby drops percentiles?
A drop of 2 or more major percentile lines (e.g., from 50th to below 10th) warrants a pediatrician visit. Minor fluctuations are common, especially around growth spurts, illness, or changes in feeding.
How often should I weigh my baby?
In the first few weeks of life, weighing every few days helps confirm adequate feeding. After that, monthly weigh-ins during well-child visits are sufficient for most healthy babies. Avoid daily home weighing, as it can cause unnecessary anxiety.
Percentily Váhy Kojence dle Věku (WHO)
WHO reference váha-pro-věk (chlapci).
| Věk | 3. percentil | 50. percentil (Medián) | 97. percentil |
|---|---|---|---|
| Birth | 2.5 kg | 3.3 kg | 4.0 kg |
| 1 month | 3.4 kg | 4.5 kg | 5.7 kg |
| 2 months | 4.4 kg | 5.6 kg | 7.1 kg |
| 3 months | 5.1 kg | 6.4 kg | 8.0 kg |
| 4 months | 5.6 kg | 7.0 kg | 8.7 kg |
| 6 months | 6.4 kg | 7.9 kg | 9.8 kg |
| 9 months | 7.2 kg | 8.9 kg | 11.0 kg |
| 12 months | 7.8 kg | 9.6 kg | 11.9 kg |
| 18 months | 8.8 kg | 10.9 kg | 13.7 kg |
| 24 months | 9.7 kg | 12.2 kg | 15.3 kg |
Naposledy aktualizováno: March 2026