The calculator splits the first year into seven buckets: diapers & wipes, formula & feeding, clothing, nursery furniture, gear (stroller, car seat, carrier), health & hygiene, and "extras" (toys, books, photos). Presets are typical mid-range monthly averages converted to the currency you choose. Big one-time purchases (crib, stroller, car seat) are spread across the year as a monthly allocation so the total reads like a real budget.
计算器把第一年分成七个桶：纸尿裤与湿巾、奶粉与喂养、衣物、婴儿房家具、出行装备（推车、安全座椅、背带）、健康与洗护、以及"其他"（玩具、绘本、照片）。预设为典型中档月均支出，并换算为你选择的货币。大件一次性购置（婴儿床、推车、安全座椅）按月分摊，让总额读起来像真实预算。
