Built for real work
Quick percentile estimate.
Baby Weight Percentile Calculator
Estimate infant weight-for-age percentile using simplified WHO reference data. Free baby growth percentile calculator.
Formula used
For clinical decisions, use official WHO/CDC growth charts with your pediatrician.
Percentile estimated from simplified WHO weight-for-age curves
Examples
Try a sample calculation
6-month, 7.5 kg boy
Sample check
Fast and focused
Boy and girl modes.
Clear results
WHO-based approximation.
Main features of Baby Percentile Calculator:
Enter the required fields—dates, amounts, percentages, or measurements as labeled.
Double-check units (currency, tax rate, height/weight) match your scenario.
Run the calculation and read the breakdown, not just the headline number.
Adjust inputs to compare scenarios, or open a related Rankify calculator for the next step.