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How fast a child grows tells you more than a single height. Children grow about 25 cm in the first year, 10–14 cm in the second, then a steady 5–6.5 cm a year until puberty, when growth speeds up again.
Enter two measurements taken at least 6 months apart (ideally a year) to get the growth rate. After age 3, growing less than 4 cm a year is a reason to see a doctor.
| Sex | Boy |
| Date of Birth (optional) | 1 Oct 2020 |
| First Measurement Date | 1 Oct 2025 |
| First Height | 110 |
| Latest Measurement Date | 1 Oct 2026 |
| Latest Height | 116 |
| Length Unit | cm |
| Growth rate (height velocity) | 6 cm a year (2.4 in) |
| Grew | 6 cm in 12 months |
| Typical for childhood (3 years to puberty) | 5–6.5 cm a year |
| Assessment | Within the usual range |
6 cm a year (2.4 in) — Within the usual range.
Try this example →About 5–6.5 cm a year between age 3 and puberty.
Around 10–12 years for girls and 12–14 years for boys, at 6–12 cm a year.
Children grow in spurts and measurements have errors, so short intervals give misleading rates.