Free & private — nothing leaves your browser

Free Baby Tools & Calculators

Quick, private calculators and checklists for everyday parenting questions — naps, formula, breast milk storage, milestones, solids, car seats, due dates and diapers. Nothing you enter leaves your browser.

Nap Schedule Calculator

Enter your baby’s age and wake-up time to get a day of naps and a bedtime built on age-appropriate wake windows.Open tool

Formula Amount Calculator

Estimate how much formula your baby may need per day and per feed, based on weight and age.Open tool

Due Date Calculator

Find your estimated due date, how far along you are, and the key dates for each trimester.Open tool

Baby Age & Adjusted Age

See your baby’s exact age in weeks and months, their adjusted age if born early, and the next milestone checkpoint.Open tool

Diaper Calculator

Estimate diapers per day and per month, the size to buy next, and your monthly diaper budget.Open tool

Car Seat Stage Finder

Rear-facing, forward-facing, booster or seat belt? Enter age, weight and height to see the right stage and what comes next.Open tool

Solid Food Readiness Checker

Tick the signs you’ve noticed to see whether your baby looks ready for first foods — and how to start safely.Open tool

Baby Milestone Checklist

An interactive CDC milestone checklist from 2 to 18 months: tick what your baby does and see what to bring up at the next check-up.Open tool

Breast Milk Storage Calculator

Pumped milk on the counter, in the fridge or thawed? Get the exact use-by date and time, based on CDC storage guidelines.Open tool

How our tools work

Each calculator uses ranges from published pediatric guidance and common practice — the same figures we explain in our guides — and runs entirely in your browser. We don’t store or send anything you type.

Results are estimates to help you plan, not medical advice. Babies vary, and your pediatrician knows your child best. If something feels off — feeding, sleep, growth or development — please ask.