Child Growth Calculator for Height and Weight
Shows the expected height and weight range for a child at a given age and checks whether the current measurements fall inside that normal range.
Recent
Formula
How the calculation works
Enter the child's age in whole years and select the gender, because the tool keeps the same simple growth rule for both but records which one applies.
The tool estimates expected height as 75 plus 6.5 times the age in centimetres, and expected weight as twice the age plus four in kilograms.
It then builds a normal range of plus or minus 15 percent around each expected value and tells you whether the entered height and weight sit inside it.
Common mistakes
- Treating the range as a diagnosis, because this is a rough screening guide and a real assessment needs a growth chart and a doctor.
- Forgetting that the rule is built for school-age children, so applying it to a newborn or a teenager gives misleading values.
When to use it
- Use it between routine check-ups to see whether a child's height and weight are tracking roughly where the age suggests they should be.
- Use it to decide whether a small difference is worth mentioning to a paediatrician rather than worrying without a reference point.
Worked example
For a 5-year-old boy who is 108 cm tall and weighs 17 kg, the expected height is 107.5 cm with a range of about 91.4 to 123.6 cm, and the expected weight is 18 kg with a range of about 15.3 to 20.7 kg.
Common questions
Is this a substitute for a doctor's growth chart?
No, it is a quick estimate for reassurance and early noticing, and any persistent concern should be checked by a paediatrician using standard growth charts.
Related tools
-
Family Monthly Budget Planner
Split a monthly income into food, housing, education, health and savings so each category shows a clear taka amount.
-
Medicine Dose Calculator for Children
Calculates a child's total daily dose in milligrams from body weight and the dose per kilogram, then splits it into the amount for each administration.
-
Wedding Budget Calculator in Taka
Adds venue, food, clothing and other costs to give the total wedding budget in Taka and the average cost per guest.
-
Calorie Deficit Calculator
Work out your daily calorie deficit, the weight loss it predicts and how many days a week you will hold that deficit.
-
Heart Rate Zone Calculator
Work out your maximum heart rate and the beats-per-minute range of your training zone from your age and the intensity band you choose.
-
Lean Body Mass Calculator
Find your lean body mass, the fat mass you carry and the weight you would need for a goal body fat percentage.
-
Ovulation and Fertile Window Calculator
Estimates your ovulation day and fertile window from the first day of your last period, your cycle length and your luteal phase.
-
Pregnancy Weight Gain Calculator
Find the recommended total weight gain range for your pregnancy from your pre-pregnancy body mass index and whether you carry one baby or twins.