ParentFlow · Free Tools

Free tools for the daily baby math.

Quick, science-based calculators for the questions you ask every day — no login, no app required. Track milestones, sleep timing, feeding, growth, and daily checks while always pointing you back to your baby's own cues and your pediatrician.

Free tools parents can use before opening the app

These calculators answer practical baby-care questions with clear assumptions and links back to the full guide. They are designed for fast reference, not diagnosis; use them alongside your child's cues and your pediatrician's advice.

Sleep and daily rhythm

Baby wake window calculator — age-based wake windows and sleepy-cue timing.
Baby bedtime calculator — estimate bedtime from wake time, naps, and age.
Baby sleep schedule by age — sample nap and bedtime patterns.

Feeding, growth, and safety checks

Milestone and activity tracker — choose age, check skills, and get a simple progress stat.
Baby feeding amount calculator — formula amount estimates by age and weight.
Newborn diaper count checker — wet and dirty diaper counts that help flag feeding concerns.
Baby growth percentile calculator — WHO-based growth context for babies.
Baby age and corrected age calculator — age in weeks, months, and corrected age for preemies.

Choosing a baby app

Best baby tracker apps — compare free tiers, platforms, and standout features.
3 a.m. baby tracker test — a practical framework for judging real overnight usability.
Best AI baby app — what AI can and cannot do in baby care.
Baby app that answers questions — how Ask Flo differs from generic search.

ParentFlow features

SleepBaby Sleep Planner: wake windows & nap timing→ SoothingBaby Cry Translator: what the crying means→ AskAsk Flo: answers from your baby’s logs→ InsightsBaby Trends & Insights: see the pattern→

Development

0–6 yrMilestone & activity tracker by age→ By ageMilestones & development guide library→

Sleep

0–3 yrBaby Wake Window Calculator by Age→ By ageBedtime calculator: what time for bed?→ By ageSleep schedule generator by age→

Wellbeing

Self-checkPostpartum depression self-check (EPDS)→ MomWhen & how to get help for postpartum depression→ MomPostpartum rage: why am I so angry?→ ParentsParental burnout: signs & recovery→ DadPostpartum depression in dads→

Feeding & growth

0–12 moFeeding amount: how many oz by weight & age→ 0–6 moIs my baby getting enough milk? At-home check→ 0–4 wkDiaper count checker: is baby getting enough?→ Birth–2 yrGrowth percentile calculator (WHO)→

Pregnancy, labor & baby calculators

PregnancyDue date calculator→ TTCOvulation calculator→ PregnancyPregnancy weight gain calculator→ BabyBaby age calculator→

Choosing a baby app

CompareBest baby tracker apps (2026)→ TestWe tested baby tracker apps at 3 a.m.→ FreeFree baby tracker apps: what’s actually free→ FeedingBest app to track breastfeeding→ SleepBest baby sleep tracking app→ FeedingBest baby feeding tracker app→ All-in-oneBest all-in-one baby app (pregnancy to age 6)→ PregnancyBest pregnancy & baby app→ New parentsBest baby app for new parents→ AIBest AI baby app: what it actually does→ AskBaby app that answers your questions→ CompareParentFlow vs Huckleberry→ CompareParentFlow vs Nara Baby→

Sharing & cross-device

2 parentsShared baby tracker for two parents→ Care teamBest shared baby tracker (multiple caregivers)→ DaycareBaby tracker daycare can use→ WebBaby tracker that works in a browser→ How-toShare baby tracking with your partner→ How-toTrack your baby across phone & computer→

Free printables

PrintPrintable baby feeding log→ PrintPrintable baby diaper log→ PrintPrintable baby sleep schedule→ PrintPrintable wake windows chart→ PrintPrintable milestone tracker→ AboutAbout ParentFlow→

Browse all guides by age →