Baby Weight Tracker Calculator
Calculate the expected baby weight based on birth weight and age.
This tool is for informational purposes only and does not replace medical advice. Consult a doctor for decisions about your health.
kg
months
Result
5,7 kg
Expected weight: 5,7 kg (5,13–6,27 kg)
Result in all units
Step-by-step solution
What Is Baby Weight Tracking?
Baby weight tracking compares the baby's weight against growth curves (percentiles) by age and sex. It is used to monitor healthy growth.
How is it calculated?
How Is It Calculated?
- Enter the baby's age, sex and weight.
- The value is compared against the percentile ranges appropriate for the age.
The percentile shows the baby's position among peers; rather than a single measurement, the trend over time is what matters.
Frequently Asked Questions
Which percentile is normal?
Between 3 and 97 is generally considered normal; the main assessment is whether the baby steadily follows its own curve. Consult a doctor if you are concerned.