Baby Growth Calculator – Baby Weight Chart by Month

Q: What is the normal weight of a newborn baby in India?

According to WHO standards, the normal weight of a newborn baby (at birth) is between 2.5 kg and 4.0 kg, with 3.3 kg being the median for boys and 3.2 kg for girls. Indian newborns often weigh between 2.5–3.5 kg, which is slightly lower than the global average due to genetic factors — and this is considered normal by the Indian Academy of Pediatrics (IAP).

Q: How much should a 5-month-old baby weigh?

At 5 months, a baby boy should ideally weigh around 7.5 kg (WHO median) and a baby girl around 6.9 kg. The normal WHO range for a 5-month-old is 6.0–9.3 kg for boys and 5.4–8.8 kg for girls. If your baby falls within these ranges, their growth is on track.

Q: What is the ideal baby weight chart by month according to WHO?

The ideal baby weight by month according to WHO 2006 standards varies by gender. For a boy: newborn 3.3 kg, 3 months 6.4 kg, 6 months 7.9 kg, 9 months 8.9 kg, 12 months 9.6 kg. For a girl: newborn 3.2 kg, 3 months 5.8 kg, 6 months 7.3 kg, 9 months 8.2 kg, 12 months 8.9 kg. Use our calculator above for the exact percentile for your baby's age.

Q: What is the average weight of an Indian baby at 6 months?

At 6 months, the average weight for an Indian baby boy is around 7.0–7.5 kg and for an Indian baby girl is 6.5–7.0 kg. Indian babies tend to weigh 200–400g less than the WHO global median, which is usually normal. The Indian Academy of Pediatrics (IAP) growth chart is sometimes more appropriate for Indian babies — consult your paediatrician for a full assessment.

Q: How much weight should a baby gain per month?

According to WHO guidelines, babies gain weight at different rates depending on age: In months 1–3: approximately 700–900 grams per month. In months 4–6: approximately 500–600 grams per month. In months 7–9: approximately 300–400 grams per month. In months 10–12: approximately 200–300 grams per month. After 12 months, weight gain slows down to about 200–250 grams per month. These are averages — some variation is normal. See our baby weight chart by month above for detailed reference.

Why Parents Trust This Calculator

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WHO 2006 Accurate Data

Uses complete WHO Multicentre Growth Reference Study data for all 25 months (0–24), not estimates.

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Visual Growth Chart with Bands

See colored normal/watch/critical zones on the chart — unlike plain tables on other sites.

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kg, lbs, cm & inches

Enter measurements in any unit — kilograms or pounds, centimetres or inches. Instant conversion built in.

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Zero Data Storage

All calculations happen in your browser. We never collect, store, or share your baby's data.

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4 Metrics in One Place

Weight percentile, height percentile, BMI, and total weight gain since birth — all at once.

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Works on All Devices

Fully mobile-friendly. Works without any app download or account creation.

Weight Percentile (WHO 2006)

percentile

Below 3rd (Critical)

3rd–15th (Low)

15th–85th (Normal ✓)

85th–97th (High)

Above 97th (Very High)

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Weight

WHO median: --

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Height

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BMI

Normal: 13 – 17

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Total Gain

Since birth weight

WHO Percentile Growth Chart

Your baby's measurement plotted against WHO standard percentile bands

Below 3rd / Above 97th (Critical zone)

3rd–15th & 85th–97th (Watch zone)

15th–85th (Normal zone)

50th Median

Your baby

Full WHO Reference Table

WHO 2006 weight-for-age standards (0–24 months). Your baby's age is highlighted.

💡 Personalised Growth Insights

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Medical Disclaimer: This tool uses WHO (2006) Child Growth Standards for reference only. Results are not a substitute for professional medical advice. Growth assessment must be done over time, not from a single measurement. Always consult your paediatrician or doctor for a complete evaluation of your baby's growth and health.

Frequently Asked Questions

Common questions parents ask about baby weight and growth charts

What is the normal weight of a newborn baby in India? +

According to WHO standards, the normal birth weight is between 2.5 kg and 4.0 kg, with 3.3 kg being the median for boys and 3.2 kg for girls. Indian newborns often weigh between 2.5–3.5 kg, which is slightly lower than the global average due to genetic factors — and the Indian Academy of Pediatrics (IAP) considers this normal.

A baby weighing less than 2.5 kg at birth is classified as Low Birth Weight (LBW) and may need extra monitoring. Use the calculator above to check your baby's exact birth weight percentile.

How much should a 5-month-old baby weigh? +

At 5 months, the WHO median weight is 7.5 kg for baby boys and 6.9 kg for baby girls. The healthy normal range (15th–85th percentile) is:

Boys: 6.7 kg – 8.4 kg
Girls: 6.1 kg – 7.8 kg

If your 5-month-old's weight falls within this range, their growth is on track. For Indian babies, the normal weight may be 200–300g lower, which is often still healthy. Enter your baby's details in the calculator above for a personalised result.

What is the ideal baby weight chart by month according to WHO? +

Here are the ideal (median) weights from the WHO baby weight chart by month:

Baby Boy Weight (WHO Median): Newborn 3.3 kg → 3M: 6.4 kg → 6M: 7.9 kg → 9M: 8.9 kg → 12M: 9.6 kg → 18M: 10.9 kg → 24M: 12.2 kg

Baby Girl Weight (WHO Median): Newborn 3.2 kg → 3M: 5.8 kg → 6M: 7.3 kg → 9M: 8.2 kg → 12M: 8.9 kg → 18M: 10.2 kg → 24M: 11.5 kg

These are medians — half of healthy babies weigh more and half weigh less. For the full detailed baby weight chart by month, including percentile ranges, visit our main guide.

What is the average weight of an Indian baby at 6 months? +

The WHO median for a 6-month-old is 7.9 kg (boys) and 7.3 kg (girls). For Indian babies, the typical average is usually 200–400g lower, placing it around:

Indian baby boy at 6 months: ~7.0–7.5 kg
Indian baby girl at 6 months: ~6.5–7.0 kg

This difference is largely attributed to genetics and maternal nutrition, and is considered normal by the Indian Academy of Pediatrics. However, if your baby's weight is below the 3rd percentile on the WHO chart, consult your paediatrician regardless of ethnicity.

How much weight should a baby gain per month? +

Baby weight gain by month varies with age. According to WHO guidelines:

0–3 months: ~700–900 grams/month
4–6 months: ~500–600 grams/month
7–9 months: ~300–400 grams/month
10–12 months: ~200–300 grams/month
After 12 months: ~150–250 grams/month

These are average figures. If your baby consistently gains less than these amounts over multiple months, consult your doctor. Our calculator above automatically computes your baby's average monthly gain when you enter birth weight.