Is My Child Growing Well? Height, Weight and Head at Home
Is your child growing well? One measurement can’t tell you. What tells you is the pattern: weight, height (or length) and, under 2, head size, measured the right way and plotted on a growth chart over months. A child who stays near the same line is usually growing well, even if that line is low. A child who drops across lines is the one to show a doctor. Here’s how to measure at home accurately, how to read the chart, and what to ask at the clinic.
In brief
- Under 2 years: weight, length lying down, head circumference.
- Over 2 years: weight and height standing. Head only if the doctor asks.
- How often at home: under 6 months, monthly at the clinic; 6 to 12 months, every 1 to 2 months; 1 to 3 years, every 3 months; over 3, every 6 months.
- The key idea: following one centile line matters more than which line.
- Show a doctor: crossing two main centile lines down (or up), weight loss, a baby not back to birth weight by 2 weeks, height that stalls for 6 months or more.
- Not needed: appetite tonics or growth supplements.
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What you need
- A digital bathroom scale that reads to 100 g. A baby scale is better if you can borrow one.
- A soft, non-stretch sewing or tailor’s tape.
- A flat wall with no skirting, a hard floor, a hardback book, a pencil.
- The growth chart in your child’s health card or vaccination card. Most use WHO charts up to age 5.
How to weigh a child at home
- Same time, same clothes. Morning, before a feed or meal, in a dry nappy or light clothes, no shoes.
- Babies (the subtraction way): weigh yourself alone, then holding the baby, and subtract. Do it twice. This is only accurate to a few hundred grams, so trust the clinic scale for small babies.
- Children who can stand still (about 2 years and up): stand them in the middle of the scale, looking ahead, arms at the sides.
- Write down the date, weight to the nearest 100 g, and the child’s age in months.
How to measure length and height
Under 2, measure lying down (length). From 2, measure standing (height). Standing height is usually about 0.7 cm less than lying length, which is why charts switch at age 2.
Length, under 2 years
- Lay the baby on their back on a firm table or floor with a book held upright against the top of the head.
- A second adult keeps the head straight and gently holds both knees flat.
- Bring a second book up against the soles, feet flat and toes pointing up.
- Remove the baby and measure between the books with the tape. Repeat, and use the average to the nearest 0.5 cm.
Height, 2 years and over
- Shoes, socks, caps and hair clips off; plaits undone if they’re at the back of the head.
- Heels together against the wall. Heels, bottom, shoulders and back of head touch the wall, or as many as the child’s shape allows.
- The child looks straight ahead, not up. Rest the book flat on the head at a right angle to the wall.
- Mark under the book with a pencil, then measure from floor to mark. Do it twice; use the average to the nearest 0.5 cm.
How to measure head circumference (under 2)
- Wrap the tape around the widest part of the head: just above the eyebrows, above the ears, and around the most prominent bump at the back.
- Pull it snug, not tight. Hair flattened, no clips.
- Measure 3 times, moving the tape slightly, and record the largest to the nearest 0.1 cm.
The head grows fastest in the first year, about 12 cm in total, most of it in the first 6 months. A head that grows much faster than the chart line, especially with a tense bulging soft spot, vomiting or drowsiness, needs a doctor promptly. So does a head that barely grows.
How to read a growth chart without getting scared
A centile line compares your child with 100 healthy children of the same age and sex. The 25th centile means 25 out of 100 children are lighter or shorter. That’s normal. So is the 3rd, and so is the 97th, if the child follows it steadily and the parents are of similar build.
What doctors look for:
- Crossing lines downwards. A drop across two main centile lines (say from the 50th to below the 9th) needs a check, even if the child looks fine.
- Weight and height far apart. A child whose weight sits two or more lines below their height may be undernourished; one far above may be gaining too fast.
- Height stalling. A child who doesn’t grow at all over 6 months, beyond the first two years, needs a review.
- Early swings are common. Many babies shift a line in the first 1 to 2 years as they settle towards their family’s build. A doctor can tell this from a problem.
Rough milestones to sanity-check
Most babies are back to birth weight by 2 weeks, about double it by 4 to 6 months and triple it by 1 year. Length goes up by roughly 25 cm in the first year and about 12 cm in the second. After that, steady growth of about 5 to 6 cm a year is typical until puberty. These are rough averages, not targets.
What the numbers can and can’t prove
Home measurements are good for spotting a trend. One reading is easily off by a few hundred grams or a centimetre, so never act on a single number. Plot three or four over time. And a child can be on a perfect line and still be unwell (a fever, a cough that won’t go), while a small, steady child is usually just small. The chart answers one question: is this child following their own curve?
What to ask the doctor
- “Which centile is my child on, and has it changed since the last visit?”
- “Is the weight in proportion to the height?”
- “Given our heights as parents, where would you expect my child to be?”
- “Should we check for anaemia, thyroid, worms or gut problems?”
- “When should we measure again?”
Bring your written measurements. A doctor can use them.
Myth: a thin or short child needs a tonic
Appetite syrups and growth powders don’t make a healthy child grow taller, and some sold without prescriptions contain medicines that cause harm. If the chart shows a real problem, the answer is finding the cause (feeding, illness, anaemia, hormones), not adding a product. See our guide on a child who won’t eat and why tonics aren’t the answer. For how genes, sleep and food shape final height, read bachon ka qad. More in Bachon Ki Sehat.
A baby hasn’t regained birth weight by 2 weeks or is losing weight; a baby under 6 months is feeding poorly or has fewer than 6 wet nappies a day (after the first week); a child of any age isn’t passing urine for 6 to 8 hours, has sunken eyes or no tears; vomiting every feed or green vomit; the soft spot is bulging with vomiting or drowsiness; the head is growing fast. Book a routine visit soon for crossing two centile lines, height that stalls for 6 months, very early signs of puberty (under 8 in girls, under 9 in boys) or a child falling behind classmates in height. Babies under 6 months get only breast milk or formula; no water, ghutti or tonics to “build them up”. Never give a supplement or medicine to change growth without a doctor.
Growth questions parents ask
How do I know if my child is growing well?
Plot weight and height on a growth chart over several months. If your child follows roughly the same centile line and seems active and well, they’re usually growing well. A drop across two lines is the thing to check with a doctor.
My child is on the 5th centile. Is that bad?
Not by itself. Five in 100 healthy children sit there. If your child has stayed on that line, is healthy and the parents are small, it’s often normal. Falling to it from higher is different.
What is a normal weight for a 1-year-old?
Many are around three times their birth weight, often 8 to 11 kg, but the range is wide. Where your child sits on the chart, and whether they’ve kept to their line, matters more than a single number.
How often should I weigh my baby?
Monthly at the clinic in the first 6 months is enough for most babies. Weighing at home every day only shows normal ups and downs and adds worry.
How do I measure my baby’s length at home?
Lay the baby flat with a book at the head and one at the soles while a helper holds the knees straight, then measure between the books. Repeat and average.
Why does head size matter?
Under 2, head growth tracks brain growth. A head growing much too fast or too slowly can be an early sign of a problem, which is why clinics measure it.
Will a growth supplement make my child taller?
Not in a healthy child. Height is mostly set by genes, good food, sleep and good health. Supplements only help a proven deficiency, and a doctor should decide.
When should I worry about my child’s height?
When your child falls across centile lines, stops growing for 6 months or more after age 2, or is much shorter than both parents’ heights would suggest. Ask your doctor to plot it.
Can worms or anaemia slow growth?
Yes, both can, along with frequent diarrhoea and some long-term illnesses. A doctor can test for them if growth falters.