Free Baby Calculators & Tools
Free baby calculators for newborn weight change, formula mixing, developmental leaps, growth spurts and sleep regressions. No sign-up, works in your browser.
- Corrected age calculator for premature babies
- Today I took care: daily self-care checklist for new parents
- Rear-facing infant car seat installation checklist
- Baby first-aid and sick-day kit checklist (0–12 months)
- Diaper bag checklist (day out, car, plane)
- Postpartum recovery checklist (C-section and vaginal birth)
- Baby travel checklist (car, plane, train)
- Newborn essentials checklist: what you really need
- Baby proofing checklist: room by room
- Parenting stress level calculator (PSS-10 style)
- Baby eye color predictor: genetics-based odds from parents
- Animal sound starter pack: first noises (farm, zoo, pets)
- Newborn poop color chart (days 1–7): meconium to yellow
- Newborn sleep cycle visualizer: active vs quiet (REM/NREM)
- Newborn vision simulator: blur by age and distance
- Baby bath temperature (°C/°F) and how long to bathe by age
- Night-light picker: best color and brightness for baby sleep
- Doctor visit question generator (0–12 months)
- Baby UV index and sunscreen guide: sun time by age
- Vaccine schedule by country: next shots and ages
- Solids portion size guide: tbsp and grams by age
- Day sleep and last nap calculator: nap cap by age
- Car and stroller nap planner: best time to leave
- Early morning wakes lite: 4–6 AM fix finder
- Baby growth spurt timeline calculator (0–6 months)
- Growth spurt signs checker: spurt or overtiredness?
- Cluster feeding planner (evening plan, birth–6 months)
- Growth spurt 3-day plan (birth–6 months)
- Toddler shoe size estimator (cruising to walking)
- How many diapers per day? Per month and cost by age
- Play ideas roulette: 3 quick activities by age
- Breast pump flange size calculator (mm → size)
- Room comfort checker: nursery temperature and humidity
- Baby outdoor layering guide: what to wear by temperature
- Daily routine builder: feed, play, sleep by age
- Tummy time plan by age (minutes, sessions and alternatives)
- What should baby wear to sleep? TOG and room temp guide
- Baby milestones by age: interactive checklist (0–24 months)
- Newborn weight change tracker: first 2 weeks (loss/gain %)
- Growth velocity estimator: gain per week and month
- How many scoops of formula for 4, 5, 6 oz or 120 ml
- Mid-parental height calculator (MPH): predict adult height
- Solids readiness checker: signs your baby may be ready
- Teething timeline calculator: baby tooth eruption by age
- Baby feeding calculator (0–12 months): daily amount by age
- Bedtime estimator: bedtime from last nap and overtired check
- Baby nap schedule calculator: wake windows by age
- Baby growth percentile calculator (WHO weight and length)
- Baby leap calculator: developmental leap dates by week
- Baby sleep regression calculator: when sleep may get harder
Are these tools free to use?
Yes. Every tool on this page is free to use, with no sign-up required. They run right in your browser.
Are the calculators a substitute for medical advice?
No. The tools give quick estimates and general guidance for everyday planning. They aren't medical advice — always check with your pediatrician for health decisions.
Do I need to create an account?
No account is needed to use the tools. For ongoing tracking of feeds, sleep, diapers, and growth, you can use the Nurtura Daily app.
How often are new tools added?
We add and refine tools regularly based on what parents find useful. Check back, or open the app to see the latest.