What does 85th percentile mean?

Out of 100 same-age, same-sex children in the CDC reference sample, your child has a higher BMI than 85 of them. The thresholds: 85th percentile and above is overweight; 95th and above is obesity; below 5th is underweight. These ranges are pediatric standards, not adult ones — don't translate them across.

Are CDC percentiles right for Pakistani / South Asian children?

They're a reasonable starting reference but not perfect. South Asian children at the same BMI typically have higher body fat percentage than the CDC US reference sample, which means the percentile may underestimate real metabolic risk. WHO has separate growth standards used by many countries that are more international. Ask your paediatrician which standards they apply for Pakistani clinical use.

What if my child is in the overweight range?

First step is a paediatric medical evaluation — sometimes growth-spurt timing, muscle mass, or underlying medical conditions explain a high BMI without it being a real concern. Children should never be put on adult-style restrictive diets. The focus is healthy eating habits, family-wide lifestyle changes, and allowing the child to grow into their weight as they get taller. Restriction in growing kids can stunt growth and trigger disordered eating.

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Child BMI Percentile Calculator

Health

Find your child's BMI percentile per CDC growth charts (ages 2–20). Accounts for age + sex — not just absolute BMI.

Health

Child BMI Percentile Calculator

Generated on July 8, 2026

Child & teen BMI is interpreted by PERCENTILE, not absolute number. A 14-year-old's "normal" BMI is very different from an adult's — this calculator looks up the right comparison group.

Age (2–20 years)

Sex

Weight

Height

Save / share— download or share to WhatsApp, Facebook & more

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Child BMI Percentile

BMI 16.3 — 45th percentile (Healthy weight)

Generated

7/8/2026

Healthy weight

16.3 BMI

≈ 45th percentile for 10.0-year-old boys.

Reference percentiles for this age

5th

14.2

Underweight

50th

16.6

Median

85th

19.6

Overweight starts

95th

22.1

Obesity starts

CDC growth chart (BMI vs age)

5th pct

50th pct

85th pct

95th pct

Your child

Step-by-step calculation

Formula

Child BMI = weight (kg) ÷ height (m)². Percentile from CDC 2000 growth chart by age + sex.

1Age: 10.0 years (male).
2Weight: 32.0 kg, height: 140.0 cm.
3BMI = 32.0 / (1.40)² = 16.33.
4For age 10.0 male: 5th=14.2, 50th=16.6, 85th=19.6, 95th=22.1.
5Estimated percentile: 44.9th → Healthy weight.
6CDC categories: <5th = Underweight; 5-85 = Healthy; 85-95 = Overweight; ≥95 = Obesity.

Estimates use simplified linear interpolation between published CDC reference points. For clinical accuracy your pediatrician uses the full LMS tables (per-month resolution). For Pakistan-specific local growth norms, your doctor may apply slightly different cutoffs (Pakistani children average ~5-10% below US reference values at the same age).

1 min readHow we build →

Quick Answer

Find your child's BMI percentile per CDC growth charts (ages 2–20). Accounts for age + sex — not just absolute BMI.

A quick primer — Child BMI Percentile Calculator

Health

The Child BMI Percentile Calculator interprets a child's or teenager's BMI by age and sex, using CDC 2000 growth-chart reference data — the standard worldwide for pediatric growth assessment. Unlike adults (where a BMI of 25 is always 'overweight'), a child's BMI must be interpreted in context: a 6-year-old with BMI 18 is overweight, but a 16-year-old with the same BMI is normal. Categories per CDC: Underweight (<5th percentile), Healthy (5-85th), Overweight (85-95th), Obesity (≥95th).

Formula

Child BMI = weight (kg) / height (m)². Result interpreted as a percentile against a same-age, same-sex reference population.

By Muhammad Salman SaleemMethodologyAlways free · Your inputs never leave your browser

Notes from the team

The paediatrician scribbled 'check BMI percentile' on the prescription pad and now you're trying to figure out whether your 8-year-old is genuinely overweight or just going through a chubby pre-growth-spurt phase. Important first thing: child BMI is not adult BMI. The adult thresholds (25 is overweight, 30 is obese) make zero sense for children because a child's body composition shifts dramatically with age. A 5-year-old's healthy BMI median is around 15.5; a 17-year-old's is around 21. Same person, totally different healthy weight. So children are measured by percentile against same-age, same-sex peers using CDC 2000 growth charts — the global standard. An 85th percentile means the child has a higher BMI than 85 out of 100 same-age, same-sex children in the reference data. The CDC reference was built mostly on US children — if you're Pakistani, your paediatrician may apply the WHO growth standards instead, which are more international and slightly more appropriate for South Asian children. South Asian kids at the same BMI tend to carry more body fat than the US reference assumes, which means the percentile may be quietly underestimating risk. Honest take: please don't put a child on an adult-style diet. Childhood weight management is about healthy eating habits, family-wide lifestyle changes, and allowing the child to grow into their weight as they get taller. Restricting calories aggressively in growing children can stunt growth and cause disordered eating patterns that last decades. Take the percentile to your paediatrician and let them interpret it in the context of growth trajectory, family history, and your child's actual health.

Pro tips most people learn the hard way

Adult BMI thresholds (25 overweight, 30 obese) do not apply to children — their body composition shifts massively with age. Use age-and-sex percentiles instead. An 85th percentile is the overweight threshold; 95th and above is obesity. Anything below 5th percentile is underweight and warrants medical evaluation.
CDC growth charts were built mostly on US children. South Asian and Pakistani children at the same BMI tend to carry more body fat than the CDC reference assumes — which means percentiles may be underestimating real metabolic risk. WHO standards are more international; ask your paediatrician which they apply.
Never put a child on an adult-style restrictive diet. Childhood weight management is about healthy eating habits, family-wide lifestyle changes, and allowing the child to grow into their weight as they get taller. Aggressive calorie restriction in growing kids can stunt growth and trigger disordered eating that lasts decades.
Single readings during growth spurts can be misleading — teens especially can shift percentile rapidly as height catches up to weight. Track across multiple paediatrician visits over months, not single panic readings. Trajectory matters more than any one number.
Take the percentile to your paediatrician for interpretation, not to a fitness influencer or a worried aunty. Sometimes a high percentile reflects muscle mass, growth-spurt timing, or a medical condition rather than excess fat. The paediatrician sees the full picture; the calculator only sees three numbers.

?What is the Child BMI Percentile Calculator?

The Formula

Child BMI = weight (kg) / height (m)². Result interpreted as a percentile against a same-age, same-sex reference population.

Practical Examples

10-year-old boy, 32 kg, 140 cm: BMI 16.3 ≈ 50th percentile (healthy median).

8-year-old girl, 35 kg, 130 cm: BMI 20.7 ≈ 95th+ percentile (obesity).

16-year-old girl, 50 kg, 165 cm: BMI 18.4 ≈ 25th percentile (healthy, on the lean side).

5-year-old: Healthy BMI range is 14-17. Adult-style 'normal' BMI numbers don't apply — kids are leaner.

Teen growth spurts can shift percentile rapidly. A single reading isn't enough — track over multiple visits.

Frequently Asked Questions

Because children's body composition changes dramatically with age — a 4-year-old's healthy BMI median is around 15.5, while a 17-year-old's is around 21. Adult categories (25 overweight, 30 obese) make no sense for growing bodies. Percentiles compare your child to same-age, same-sex peers in a reference population, which is the only fair comparison while they're still growing.

Popular Conversions

Jump to a ready-made conversion — useful for quick reference and sharing:

Browse all Health

BMI Calculator

Calculate Body Mass Index against WHO and Asian-population thresholds for men and women using kg or lb, cm or inches, with healthy-range guidance.

BMR Calculator

Estimate Basal Metabolic Rate using the Mifflin-St Jeor equation by sex, age, weight and height — the resting kcal/day baseline for diet planning.

TDEE Calculator

Compute Total Daily Energy Expenditure from BMR and activity multiplier (sedentary to extra active) to set kcal targets for cutting, maintenance, or bulking.

Ideal Weight Calculator

Find your ideal weight range in kg and lb using the Robinson, Miller, Devine and Hamwi formulas alongside the BMI 18.5-24.9 healthy band for men and women.

Water Intake Calculator

Calculate daily water intake in millilitres or litres from body weight and exercise minutes, with hot-climate, pregnancy and breastfeeding adjustments.

Body Fat Calculator

Estimate body fat percentage with the US Navy tape-measure method using neck, waist and hip in cm or inches — a no-cost alternative to DEXA scans for men and women.

Macro Calculator

Calculate your daily protein, carbohydrate, and fat targets based on your goals.

Pregnancy Due Date Calculator

Estimate baby's due date using Naegele's rule (LMP + 280 days), adjusted for cycle length, with conception date, trimester boundaries and current week and day.

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Premium Converters

Child BMI Percentile Calculator

Health

Find your child's BMI percentile per CDC growth charts (ages 2–20). Accounts for age + sex — not just absolute BMI.

Health

Child BMI Percentile Calculator

Generated on July 8, 2026

Child & teen BMI is interpreted by PERCENTILE, not absolute number. A 14-year-old's "normal" BMI is very different from an adult's — this calculator looks up the right comparison group.

Age (2–20 years)

Sex

Weight

Height

Save / share— download or share to WhatsApp, Facebook & more

Premium Converters

Child BMI Percentile

BMI 16.3 — 45th percentile (Healthy weight)

Generated

7/8/2026

Healthy weight

16.3 BMI

≈ 45th percentile for 10.0-year-old boys.

Reference percentiles for this age

5th

14.2

Underweight

50th

16.6

Median

85th

19.6

Overweight starts

95th

22.1

Obesity starts

CDC growth chart (BMI vs age)

5th pct

50th pct

85th pct

95th pct

Your child

Step-by-step calculation

Formula

Child BMI = weight (kg) ÷ height (m)². Percentile from CDC 2000 growth chart by age + sex.

1Age: 10.0 years (male).
2Weight: 32.0 kg, height: 140.0 cm.
3BMI = 32.0 / (1.40)² = 16.33.
4For age 10.0 male: 5th=14.2, 50th=16.6, 85th=19.6, 95th=22.1.
5Estimated percentile: 44.9th → Healthy weight.
6CDC categories: <5th = Underweight; 5-85 = Healthy; 85-95 = Overweight; ≥95 = Obesity.

1 min readHow we build →

Quick Answer

Find your child's BMI percentile per CDC growth charts (ages 2–20). Accounts for age + sex — not just absolute BMI.

A quick primer — Child BMI Percentile Calculator

Health

Formula

Child BMI = weight (kg) / height (m)². Result interpreted as a percentile against a same-age, same-sex reference population.

By Muhammad Salman SaleemMethodologyAlways free · Your inputs never leave your browser

Notes from the team

Pro tips most people learn the hard way

Adult BMI thresholds (25 overweight, 30 obese) do not apply to children — their body composition shifts massively with age. Use age-and-sex percentiles instead. An 85th percentile is the overweight threshold; 95th and above is obesity. Anything below 5th percentile is underweight and warrants medical evaluation.
CDC growth charts were built mostly on US children. South Asian and Pakistani children at the same BMI tend to carry more body fat than the CDC reference assumes — which means percentiles may be underestimating real metabolic risk. WHO standards are more international; ask your paediatrician which they apply.
Never put a child on an adult-style restrictive diet. Childhood weight management is about healthy eating habits, family-wide lifestyle changes, and allowing the child to grow into their weight as they get taller. Aggressive calorie restriction in growing kids can stunt growth and trigger disordered eating that lasts decades.
Single readings during growth spurts can be misleading — teens especially can shift percentile rapidly as height catches up to weight. Track across multiple paediatrician visits over months, not single panic readings. Trajectory matters more than any one number.
Take the percentile to your paediatrician for interpretation, not to a fitness influencer or a worried aunty. Sometimes a high percentile reflects muscle mass, growth-spurt timing, or a medical condition rather than excess fat. The paediatrician sees the full picture; the calculator only sees three numbers.

?What is the Child BMI Percentile Calculator?

The Formula

Child BMI = weight (kg) / height (m)². Result interpreted as a percentile against a same-age, same-sex reference population.

Practical Examples

10-year-old boy, 32 kg, 140 cm: BMI 16.3 ≈ 50th percentile (healthy median).

8-year-old girl, 35 kg, 130 cm: BMI 20.7 ≈ 95th+ percentile (obesity).

16-year-old girl, 50 kg, 165 cm: BMI 18.4 ≈ 25th percentile (healthy, on the lean side).

5-year-old: Healthy BMI range is 14-17. Adult-style 'normal' BMI numbers don't apply — kids are leaner.

Teen growth spurts can shift percentile rapidly. A single reading isn't enough — track over multiple visits.

Frequently Asked Questions

Popular Conversions

Jump to a ready-made conversion — useful for quick reference and sharing:

Browse all Health

BMI Calculator

Calculate Body Mass Index against WHO and Asian-population thresholds for men and women using kg or lb, cm or inches, with healthy-range guidance.

BMR Calculator

Estimate Basal Metabolic Rate using the Mifflin-St Jeor equation by sex, age, weight and height — the resting kcal/day baseline for diet planning.

TDEE Calculator

Compute Total Daily Energy Expenditure from BMR and activity multiplier (sedentary to extra active) to set kcal targets for cutting, maintenance, or bulking.

Ideal Weight Calculator

Find your ideal weight range in kg and lb using the Robinson, Miller, Devine and Hamwi formulas alongside the BMI 18.5-24.9 healthy band for men and women.

Water Intake Calculator

Calculate daily water intake in millilitres or litres from body weight and exercise minutes, with hot-climate, pregnancy and breastfeeding adjustments.

Body Fat Calculator

Estimate body fat percentage with the US Navy tape-measure method using neck, waist and hip in cm or inches — a no-cost alternative to DEXA scans for men and women.

Macro Calculator

Calculate your daily protein, carbohydrate, and fat targets based on your goals.

Pregnancy Due Date Calculator

Estimate baby's due date using Naegele's rule (LMP + 280 days), adjusted for cycle length, with conception date, trimester boundaries and current week and day.

Browse all Health calculators & converters

See every tool in this category, plus FAQs and category-specific guides.

Browse other categories

Islamic9 Financial14 Gold & Silver8 Unit19 Date & Time9 Math21 Construction22 Utility20 Fun12

Child BMI Percentile Calculator (2026) | Premium Converters

Premium Converters

Premium Converters

Child BMI Percentile Calculator

Child BMI Percentile Calculator

Child BMI Percentile

Reference percentiles for this age

CDC growth chart (BMI vs age)

Step-by-step calculation

A quick primer — Child BMI Percentile Calculator

Notes from the team

Pro tips most people learn the hard way

?What is the Child BMI Percentile Calculator?

The Formula

Practical Examples

Frequently Asked Questions

Popular Conversions

Embed this calculator on your site

Browse other categories

Premium Converters

Child BMI Percentile Calculator

Child BMI Percentile Calculator

Child BMI Percentile

Reference percentiles for this age

CDC growth chart (BMI vs age)

Step-by-step calculation

A quick primer — Child BMI Percentile Calculator

Notes from the team

Pro tips most people learn the hard way

?What is the Child BMI Percentile Calculator?

The Formula

Practical Examples

Frequently Asked Questions

Popular Conversions

Embed this calculator on your site

Browse other categories

Premium Converters

Premium Converters

Child BMI Percentile Calculator

Child BMI Percentile Calculator

Reference percentiles for this age

CDC growth chart (BMI vs age)

Step-by-step calculation

A quick primer — Child BMI Percentile Calculator

Notes from the team

Pro tips most people learn the hard way

?What is the Child BMI Percentile Calculator?

The Formula

Practical Examples

Frequently Asked Questions

Why do children use percentiles instead of absolute BMI?

What does 85th percentile mean?

Are CDC percentiles right for Pakistani / South Asian children?

What if my child is in the overweight range?

Popular Conversions

Embed this calculator on your site

More Health Tools

Browse other categories

Premium Converters

Child BMI Percentile Calculator

Child BMI Percentile Calculator

Reference percentiles for this age

CDC growth chart (BMI vs age)

Step-by-step calculation

A quick primer — Child BMI Percentile Calculator

Notes from the team

Pro tips most people learn the hard way

?What is the Child BMI Percentile Calculator?

The Formula

Practical Examples

Frequently Asked Questions

Why do children use percentiles instead of absolute BMI?

What does 85th percentile mean?

Are CDC percentiles right for Pakistani / South Asian children?

What if my child is in the overweight range?

Popular Conversions

Embed this calculator on your site

More Health Tools

Browse other categories