HowManyDiapers.com - Estimate Diaper Quantities and Sizes
HowManyDiapers.com is a free tool to help you estimate how many disposable diapers you'll need, and what sizes, for any time period. ... For those buying for multiple babies (parents of twins or triplets, daycares, non-profits, diaper banks, etc.), just "Add a Baby" before you submit. The total number of diapers will be added up at the end.