Tools
Free Parenting & Pregnancy Tools and Calculators
Free, evidence-based parenting tools: baby sleep calculator, pregnancy due date calculator, and a solid foods readiness checker. Instant, no sign-up needed.
Pregnancy
Baby Pool: Birth Prediction Game
Free guessing game for your baby shower — gender, date, weight. No app, no sign-up.
Sleep
Baby Sleep Calculator
See recommended total sleep, naps, and wake windows by age.
Pregnancy
Due Date Calculator
Estimate your due date, current week, and trimester.
Nutrition
Solid Foods Readiness Checker
Check whether your baby is ready to start solids.
Pregnancy
Ovulation Calculator
Estimate your most likely ovulation day and fertile window.
Pregnancy
RSV Vaccine in Pregnancy
Enter your due date to see when the RSV vaccine in pregnancy is offered in the US or UK, how it fits with the baby antibody, and the side effects.
Pregnancy
Pregnancy Test Calculator
See when to take a pregnancy test from your last period or the date you had sex, based on NHS (UK) or FDA and OWH (US) advice. Plus an early signs checklist.
Baby
Baby Growth Percentile Calculator
Calculate weight, length, or head circumference percentile per WHO standards.
Baby
UK Baby Immunisation Schedule 2026
Enter the birth date and see each NHS jab date from the official 2026 schedule.
Baby
Adult Height Predictor
Estimate your child's adult height from both parents' heights, with the range the estimate carries.
Baby
Child Development Assessment
Adaptive check of movement, language, thinking, social and emotional skills for ages 1–84 months.
Nutrition
Formula & Milk Intake Calculator
See the recommended daily milk amount by baby's age and weight.
Nutrition
Formula Tin Calculator
Work out how many days a tin of formula lasts, how many ml it makes and how many tins you need a month.
Baby
Diaper Size Calculator
See typical diaper size and estimated monthly usage by weight.
Sleep
Nap Transition Calculator
See typical nap count by age and the next transition window.
Sleep
Wake Window Calculator
Calculate wake window by age and estimated next sleep time.
Sleep
Sleeping Bag TOG Guide
What TOG for your room temperature, and what to wear underneath.
Sleep
Bedtime Calculator
See tonight's suggested bedtime from your baby's age and when the last nap ended.
Sleep
Nap Schedule Generator
Turn this morning's wake-up time into today's naps, bedtime and total daytime sleep.
Sleep
Sleep Regression Checker
See which regression is commonly reported at your baby's age and how long it usually runs.
Sleep
Clock Change Sleep Planner
Get a four-day, 15-minute-a-day plan to move your baby onto the new time.
Baby
Teething Timeline Calculator
See interactively which teeth have come in or are next, by baby's age.
Baby
Well-Child Checkup Calculator
See typical checkup age windows based on date of birth.
Screen-Free
Screen Time Calculator
See recommended daily screen time guidance by child's age.
Pregnancy
Pregnancy Weight Gain Calculator
Calculate recommended total weight gain range by your BMI.
Pregnancy
Contraction Timer
Time each contraction's length and spacing, with a 5-1-1 pattern alert.
Baby
Baby Age Calculator
See your baby's age in months, weeks, and days.
Baby
Corrected Age Calculator
For babies born early: corrected age, gestational age at birth, and weeks early.
Nutrition
Breast Milk Storage Calculator
How long expressed milk keeps at room temperature, in the fridge, frozen, thawed, or warmed.
Pregnancy
Pregnancy Weeks to Months
Convert pregnancy weeks to months, with the trimester and a full 40-week table.
Baby
Diaper Cost Planner
How many diapers per week and month by age, costed with your own pack price.
Pregnancy
Kick Counter
Tap to count your baby's movements and time how long 10 take.
Baby
Milestone Checklist
Pick your child's age and check CDC milestones across four skill areas.
Screen-Free
Toy Rotation Planner
Get how many toys to keep out, how many groups to rotate, and how often.
Screen-Free
Play Space Audit
Answer five quick questions about the room to get a scored, prioritized fix list.
Screen-Free
Rainy Day Plan Builder
Enter how many hours you need to fill, your child's age, and nap or quiet time — get a timed block-by-block plan for the day.
Screen-Free
Independent Play Timer
Enter your child's age for a realistic starting target, a working countdown timer, and a build-up sequence for extending solo…
Memories
Milestone Photo Checklist: The First-Year Shots Parents Wish They'd Taken
Enter your baby's birth date to see which classic first-year photos are still possible, which window is closing, and which have…
Memories
Time Capsule Letter Planner: What to Write and When to Open It
Enter your child's birth date to get the calendar dates for letters opened at 5, 10, 13, 18, and 21 — plus real writing prompts…
Memories
Memory Box Checklist: What's Actually Worth Keeping
Tick off real keepsakes, see honest storage notes, and the things people keep then quietly throw out.
Memories
Photo Album Planner
Enter how many photos you take of your child and see how many you'll have per year, how many actually survive sorting, and a…
Memories
Baby's Firsts Record Sheet
Enter your baby's birth date to see the typical age window for classic firsts — smile, roll, tooth, word, steps, and more — then…
Beyond Calculators: Personalized Tracking with Whispie
Whispie logs feeds, nappies and sleep for free and shows wake windows for your baby's age. Next-nap times are free for your first 3 days, then Premium, which also learns your baby's own patterns for personal predictions.