Growth
Growth percentiles the moment you leave the doctor
Log the weight, length and head size from each visit and TallyTot shows the WHO percentile for your baby’s exact age — the same standard pediatricians use for children under 2.
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WHO Child Growth Standards
Weight-for-age, length-for-age and head-circumference-for-age, by sex.
Pounds and ounces or kg
Enter it the way the doctor said it.
Birth weight to now
Your recap shows how many times over they’ve multiplied their birth weight.
How it works
- Tap Growth.
- Enter weight, length and/or head circumference.
- See the percentile in the Doctor tab.
Questions
What percentile should my baby be in?
There’s no “right” percentile — what matters is a steady curve over time. Ask your pediatrician about any big jumps. Try our free WHO growth percentile calculator.
Comparing apps? See the best baby tracker apps of 2026.
Start tracking free — tonight
No sign-up wall, no ads, free for both parents. Starting late? TallyTot fills in the early months from a few rough guesses.
Start free →Works in any browser today · iPhone & Android apps rolling out now