What does a growth percentile mean?
A percentile compares your child with healthy children of the same age and sex. If your baby’s weight is on the 40th percentile, 40 out of 100 healthy babies of that age weigh less and 60 weigh more. There is no “best” percentile — a baby on the 10th percentile can be just as healthy as one on the 90th. What matters most is that your child grows steadily along their own curve over time.
This calculator uses the WHO Child Growth Standards (0–5 years), which describe how healthy breastfed children grow in the best conditions and are used in India, the USA (under 2 years) and over 140 countries.
How to read the result
| Percentile |
What it usually means |
| Below 3rd |
Below the usual range — discuss with your doctor |
| 3rd–15th |
Smaller side of normal |
| 15th–85th |
Middle range |
| 85th–97th |
Larger side of normal |
| Above 97th |
Above the usual range — discuss with your doctor |
Also talk to your doctor if your child crosses two major percentile lines (for example, from the 50th to below the 15th), or if weight and length percentiles are very far apart.
Average weight by age (WHO, 50th percentile)
| Age |
Boys |
Girls |
| Birth |
3.3 kg |
3.2 kg |
| 6 months |
7.9 kg |
7.3 kg |
| 1 year |
9.6 kg |
8.9 kg |
| 2 years |
12.2 kg |
11.5 kg |
| 3 years |
14.3 kg |
13.9 kg |
| 5 years |
18.3 kg |
18.2 kg |
Feeding questions? See our baby food chart and toddler food chart.
Frequently asked questions
Is the 5th percentile bad for a baby?
Not necessarily. Many small but healthy babies grow steadily along a low percentile, especially if their parents are small. Your doctor looks at the trend over time, not one number.
Which growth chart is used in India?
Indian doctors use the WHO standards for children under 5 years, which is what this calculator uses. For older children, IAP growth charts are used.
Why is my baby’s length percentile different from weight?
Weight and length often sit on different percentiles. It is only a concern if the gap is very large or keeps growing — your doctor may then check weight-for-length.
Sources: WHO Child Growth Standards · CDC: WHO growth charts (0–2 years)
Reviewed for accuracy against the sources above. This page is general information, not medical advice — talk to your doctor or a registered dietitian about your own needs.
More free health tools
🌸Ovulation CalculatorFind your fertile window and best days to conceive.Open tool →👶Pregnancy Due Date CalculatorFree pregnancy due date calculator — use your last period, conception date or IVF…Open tool →🤰Pregnancy Week CalculatorFind out exactly how many weeks and days pregnant you are, your trimester and…Open tool →📅Period CalculatorFree period calculator: enter your last period date and cycle length to predict your…Open tool →💞Conception Date CalculatorFind out when you most likely conceived — from your due date, last period…Open tool →🧪When to Take a Pregnancy TestFind the best day to take a home pregnancy test for an accurate result…Open tool →🌱Implantation CalculatorEstimate when implantation may happen — from your last period, ovulation date or IVF…Open tool →⚖️Pregnancy Weight Gain CalculatorCheck if your pregnancy weight gain is on track for your week — based…Open tool →🧫IVF Due Date CalculatorCalculate your IVF due date from a day-3, day-5 or day-6 embryo transfer (fresh…Open tool →💉Baby Vaccination Schedule CalculatorEnter your baby’s birth date to get every vaccine due date — India IAP…Open tool →🍼Breast Milk & Formula CalculatorFind how much breast milk or formula your baby needs per feed and per…Open tool →👣Baby Kick CounterFree online kick counter for pregnancy — tap to count your baby’s movements, time…Open tool →⏱️Contraction TimerFree contraction timer — tap to time how long contractions last and how far…Open tool →🔥Calorie Calculator (TDEE & BMR)Free calorie calculator — find your BMR and TDEE and how many calories a…Open tool →🎯Ideal Weight CalculatorFind your ideal weight for your height — healthy BMI range (including Asian cut-offs)…Open tool →📏Body Fat CalculatorEstimate your body fat percentage with a tape measure using the US Navy method…Open tool →📐Waist-to-Hip Ratio CalculatorCalculate your waist-to-hip ratio and waist-to-height ratio and see what they mean for heart…Open tool →🧮Glycemic Index CheckerSearch the glycemic index (GI) and glycemic load of 60+ Indian and global foods…Open tool →🧮Macro CalculatorFree macro calculator — your daily calories split into grams of carbs, protein and…Open tool →🧮Iron Requirement CalculatorFind how much iron you need each day by age, sex, pregnancy and diet…Open tool →🧮Child & Teen BMI CalculatorFree BMI calculator for children and teens aged 2–19 — BMI, percentile and WHO…Open tool →🧮Asian BMI CalculatorFree BMI calculator with Asian and Indian cut-offs — normal 18.5–22.9, overweight 23–24.9, obese…Open tool →🧮Steps to Calories CalculatorConvert steps into distance and calories burned based on your weight, height and walking…Open tool →🧮Indian Diabetes Risk ScoreCheck your type 2 diabetes risk in one minute with the Indian Diabetes Risk…Open tool →🧮PCOS Symptom CheckerFree PCOS symptom checker based on the Rotterdam criteria doctors use — periods, excess…Open tool →🧮Thyroid Symptom CheckerFree thyroid symptom checker — tick your symptoms to see if they point towards…Open tool →🧮Anaemia Symptom CheckerFree anaemia (anemia) symptom checker — tick your symptoms and risk factors to see…Open tool →🧮Baby Weight Chart by AgeNormal baby weight by age for boys and girls from birth to 5 years…Open tool →🧮Child Height PredictorPredict your child’s adult height from both parents’ heights using the mid-parental height method…Open tool →