Free growth calculator for parents
Child growth calculator: weight, height and BMI percentiles
Enter your child's measurements to calculate weight, height, BMI and head-circumference percentiles. This tool uses WHO Child Growth Standards from birth to 5 years and IAP 2015 references from 5–18 years.
Enter details
Add your child's birth date, sex and the measurements you have.
Saved only on this device. This tool supports—but does not replace—clinical assessment.
Enter your child's details to see the result.
Growth over time
Saved visits
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Growth over time
Saved visits
The blue dots on each chart show earlier measurements. The direction over time matters more than one percentile.
Understand your child's growth measurements
This child growth calculator helps Indian parents plot weight, length or height, BMI and head circumference against age- and sex-specific reference charts. Results appear instantly as a percentile with a plain-language interpretation.
A percentile is not a diagnosis. A child's pattern across several accurate measurements is more useful than one reading, so save each visit and discuss unexpected changes with your paediatrician.
Birth to 5 years
WHO standards for weight, length or height, weight-for-length or height, and head circumference.
5 to 18 years
IAP 2015 Indian references for height, weight and BMI, with age-appropriate interpretation.
Track the trend
Save measurements privately on this device and compare the child's direction over time.
Child growth calculator questions
What measurements should I enter?
Enter date of birth, measurement date, sex, weight and length or height. Head circumference is useful in early childhood. BMI is calculated automatically when weight and height are available.
Which growth chart does this calculator use?
It uses WHO Child Growth Standards for children younger than 5 years and the revised IAP 2015 height, weight and BMI references for Indian children from 5 to 18 years.
What does a growth percentile mean?
A percentile compares the measurement with children of the same age and sex in the reference population. The 50th percentile is the median. The trend over time is usually more informative than a single number.
When should I consult a paediatrician?
Consult a paediatrician when measurements are outside the expected range, growth slows or crosses percentile bands, measurements change unexpectedly, or you are worried about feeding, development or general health.