Baby Weight Percentile Calculator

This calculator is not right I put in 11 lbs 4oz it said 1% then I put in 11 lbs 15oz and got 0% for a 4 mo old.

This results are inaccurate based on data tables on which the calculator is supposedly based. Instead, go to http://www.cdc.gov/growthcharts/charts.htm. The site also support metric system.

This calculator seems to be approx. the same as what my ped. tells us. However, please note that the US standards have recently come "under fire" because they reflect a large proportion of formula-fed babies. Breastfed babies generally weigh less than their formula-fed counterparts and this is considered a "healthier" and more accurate comparison tool. I believe the WHO has constructed a percentile diagram using those measurements and several drs. (esp. those that are big proponents of BFing) are using those measurements. This could account for the discrepancy.

This calculator works fine, although not one hundred percent accuracy, but I think it can fairly be used as a prediction. I get a lot of useful information from this site and several other baby websites. Thanks.

Why is this calculator different than that of the doctors office?? This determines a lower percentile than what my doctor says.