All Baby Tools
Twenty free, private tools — predictions, calculations, checklists and name ideas. Search, filter, star your favorites.
Trait & Gender Predictors
9 tools · genetics & folklore
GeneticsEye Color Predictor
Probability of brown, green or blue eyes from the parents' colors.
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GeneticsHair Color Predictor
Black, brown, blonde or red — with a red-gene family bonus.
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GeneticsHair Type Predictor
Curly, wavy or straight — a simplified inheritance model.
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GeneticsHeight Predictor
Mid-parental target height with a realistic 90% range.
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GeneticsBlood Type Predictor
ABO and Rh inheritance explained as probabilities.
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GeneticsTrait Dominance Checker
Dimples, freckles, tongue rolling & 5 more classic traits.
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FunChinese Gender Chart
The classic 清宫表 by lunar age & lunar conception month.
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FunOld Wives' Tales Quiz
Eight classic folklore signs tallied into a fun lean.
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FunZodiac & Constellation
Western sign, Chinese animal, five-element year & birthstone.
Open toolPregnancy Calculators
4 tools · planning & tracking
PregnancyDue Date Calculator
LMP, conception or IVF transfer — three trusted methods.
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PregnancyWeek Tracker
Current week, trimester, fruit-size fun & weekly milestones.
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PregnancyOvulation Calculator
Find your fertile window from your cycle and last period.
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PregnancyConception Date
Work backwards from a due date to conception & LMP.
Open toolBaby Care Tools
5 tools · growth, feeding, sleep & planning
Baby CareGrowth Percentile
Weight & length percentiles against a WHO-adapted reference.
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Baby CareFeeding Amount
Per-feed and daily amounts by age and weight.
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Baby CareSleep Schedule
Age-by-age sleep needs plus a suggested bedtime.
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Baby CareNewborn Checklist
50 essentials across 6 categories, with saved progress.
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Baby CareBaby Budget
Estimate first-year costs with editable, region presets.
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