Will this tell me whether my child is normal?

No. What happens here is arithmetic, and “normal” needs an age-based reference table before it means anything — there is none behind these figures. The section above spells out what stays out of reach.

Do the numbers I type reach your server?

No. Everything is worked out in the browser on this device, and the page has no channel for sending data out — the site’s security policy closes that route outright, so it is not a promise you have to take on trust. Reload and the numbers are gone; to keep them, copy them.

growth / Height

Growth chart maker

The height records you already have, plotted at their real spacing in time.

Answers now

These years

3 records

Gone when you close this. Stored nowhere.

Where this number comes from

Your own dates and values, spaced by date. No reference bands underneath.

Step by step

One record per line: date first, value second, separated by a comma or a space; the `cm` is optional. Lines that cannot be read are listed back with their line numbers — never skipped in silence, because pasting ten lines and getting nine points with no explanation is worse than getting no chart at all. Two different values on one date are both kept and flagged; which one is right is something only you know.

What this number cannot tell you

Only your own records are drawn. Nothing is interpolated between points, nothing extrapolated past the last one, and no population bands are laid underneath — those would need a reference table, and drawing them here would turn “how this child has grown” into “how this child measures up”, which is a different tool.

An example

Paste `2025-07-01, 123.8 cm` and `2026-09-01, 128.4 cm` and you get two points, spaced by the real fourteen months between them.

Common questions

Will this tell me whether my child is normal?: No. What happens here is arithmetic, and “normal” needs an age-based reference table before it means anything — there is none behind these figures. The section above spells out what stays out of reach.
Do the numbers I type reach your server?: No. Everything is worked out in the browser on this device, and the page has no channel for sending data out — the site’s security policy closes that route outright, so it is not a promise you have to take on trust. Reload and the numbers are gone; to keep them, copy them.

The others in the same group.

All tools →

Growth chart maker

These years

Step by step

What this number cannot tell you

An example

Common questions

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Child height percentile calculator

Height growth calculator

Height percentile to centimetres