Baby BMI Calculator

Calculate your baby or toddler's BMI

Enter Your Details

How to Use the Baby BMI Calculator

Calculate your baby or toddler's BMI

1. Enter

Add the details requested in the form. Use the most recent measurements, dates, or figures you have.

2. Review

Read the result together with the notes below it. Estimates are most useful when you compare them with your own context.

3. Act

Save the result, try a related tool, or speak with a doctor, lactation consultant, childcare provider, or financial adviser when needed.

Singapore note: use your child's health booklet and polyclinic or paediatrician measurements when available, especially for growth, feeding, and vaccination tools.

Medical Disclaimer: This tool is for educational and informational purposes only. It does not provide medical advice, diagnosis, or treatment. Results are estimates only. Always consult a qualified healthcare professional for medical decisions. In an emergency, call 995 (Singapore) immediately.

BMI Interpretation for Children (WHO)

BMI for Age	Category	Action
Below 3rd percentile	Underweight	Discuss with paediatrician. May need nutritional assessment.
3rd–84th percentile	Healthy weight	Continue normal feeding and monitoring.
85th–94th percentile	At risk of overweight	Review diet and activity. Paediatrician check recommended.
95th+ percentile	Obese	Medical assessment advised. Focus on lifestyle changes.

BMI is a screening tool, not a diagnosis. It must be interpreted alongside growth trends, diet, activity level, and clinical assessment. For ongoing growth tracking, use the Growth Chart Calculator →