Free baby growth percentile calculator for ages 0-5. WHO & CDC charts for weight, length/height and head circumference, plus a private growth log. No signup — your data stays in the browser.
• WHO and CDC growth charts for weight, length and head circumference
• Corrected age for premature babies
• Private growth log stored locally in the browser
• Full reference tables by month, boys and girls
• No account, no upload — everything stays on your device
• Check where your baby sits on WHO or CDC growth curves
• Track percentiles over time between doctor visits
• Correct the age of a premature baby for accurate readings

Keeping the log in the browser is the right call for data like this. The risk is that clearing site data or changing phones wipes it, so an export and import, even as a plain CSV, would make "it never leaves your device" safer to rely on. Do you switch from the WHO to the CDC charts at age two automatically, as the CDC recommends?

Keeping the log in the browser is the right call for data like this. The risk is that clearing site data or changing phones wipes it, so an export and import, even as a plain CSV, would make "it never leaves your device" safer to rely on. Do you switch from the WHO to the CDC charts at age two automatically, as the CDC recommends?
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