Baby Weight Reference (WHO Medians)
WHO median weights by month with the ±2SD band — context for the percentile conversation, not a substitute for it.
A baby at the 10th percentile *tracking along* the 10th is growing perfectly — percentile *crossing* (down two major lines) is what paediatricians act on, never a single low-sounding number. The WHO standards describe optimally-fed children worldwide; your child's plotted curve in their own health record is the real tool.
Formula
For general information only. Pregnancy and infant care decisions must be guided by your treating clinician or midwife — always defer to their assessment.
WHO median weights by month with the ±2SD band — context for the percentile conversation, not a substitute for it. The Baby Weight Reference (WHO Medians) is a free, private baby weight chart tool — every result computes instantly in your browser with no sign-up and no data upload.
About Baby Weight Reference (WHO Medians)
A baby at the 10th percentile *tracking along* the 10th is growing perfectly — percentile *crossing* (down two major lines) is what paediatricians act on, never a single low-sounding number. It applies WHO Child Growth Standards 2006 (breastfed reference population). Use the Baby Weight Reference (WHO Medians) to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use Baby Weight Reference (WHO Medians)
- 1Enter your details in the Baby Weight Reference (WHO Medians) input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use Baby Weight Reference (WHO Medians)?
- ✓Instant baby weight chart result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (WHO Child Growth Standards, 2006)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the Baby Weight Reference (WHO Medians) work?+
A baby at the 10th percentile *tracking along* the 10th is growing perfectly — percentile *crossing* (down two major lines) is what paediatricians act on, never a single low-sounding number. The calculation uses the formula: WHO Child Growth Standards 2006 (breastfed reference population). Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the Baby Weight Reference (WHO Medians) accurate, and what is it based on?+
The method is traceable to authoritative sources: WHO Child Growth Standards, 2006. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the Baby Weight Reference (WHO Medians) free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This tool is informational only. Always defer to your treating clinician or midwife for pregnancy and infant care decisions.
What can I use the Baby Weight Reference (WHO Medians) for?+
It's commonly used for baby weight chart, baby weight by month, who growth chart. WHO median weights by month with the ±2SD band — context for the percentile conversation, not a substitute for it.
Related Health tools
Adult BMI Calculator (WHO)
Body-mass index for adults with the WHO reference bands shown neutrally, plus the substituted formula step by step.
● LiveBMI Calculator (lb & inches)
US-style BMI from pounds and inches using the ×703 conversion, with CDC adult reference ranges.
● LiveBMI Calculator for Women
BMI with reference context written for women — what the index can and cannot say about female body composition.
● Live