WELCOMEPARENTHOOD
Care for your newborn with confidence — free calculators for due dates, baby feeding amounts, sleep schedules, diaper sizes, growth percentiles, and first-year costs, plus plain-English guides to newborn care, infant sleep, and the whole first twelve months.
From counting down to your due date and getting the feeding amounts right to planning naps, sizing diapers, tracking growth, and budgeting the first year, WelcomeParenthood pairs free hands-on baby calculators with plain-English guides and a richly illustrated museum of childhood. Care for your newborn with a little more confidence.
Newborn & Baby Calculators
Free tools for the first year — due date calculator, baby feeding amount, sleep schedule planner, diaper size and quantity, growth percentile, and a first-year cost estimator.
Due Date Calculator
Estimate your due date from your last period or conception date, see how many weeks along you are today, and get the trimester milestones that mark each stage of pregnancy
Baby Feeding Amount Calculator
Estimate how much milk a formula-fed baby needs from their age and weight — millilitres and ounces per feed, feeds per day, and the daily total, with an age-based intake cap
Baby Sleep Schedule Planner
Turn your baby's age into a realistic day — total sleep in 24 hours, the number of naps, and the age-appropriate wake window between sleeps to help you time the next nap
Diaper Size & Quantity Calculator
Find the likely diaper size from your baby's weight, plus how many diapers a day and a month to expect at their age — useful for stocking up and comparing box prices
Baby Growth Percentile Calculator
See where your baby's weight or length falls on a WHO-style reference band for their age in months — a plain-English percentile to bring to your next pediatric visit
First-Year Baby Cost Estimator
Add up the real first-year budget — diapers, formula or feeding, clothing, gear, childcare, and health — to see the yearly total and what it works out to each month
Museum of Infancy & Childhood
Wander an immersive museum of how families have welcomed and raised babies through history — the cradles and prams that carried them, the bottles, rattles, and swaddling of the nursery, the customs and culture of early childhood, and the milestones of a baby’s first year, each in its own gallery, so you can get to know the stories behind the objects and ideas that shape how we care for the very young.
Tour the museum →From the Journal
Fresh guides on newborn care, baby feeding and sleep, growth and milestones, and getting ready for a new arrival, plus practical tips for surviving and enjoying the first twelve months.
What to Buy for a Baby, and What to Skip
The gap between what a baby needs and what is marketed to new parents is enormous, and the spending happens at the point of least information — before the…
Starting Solids: What Changes and What Doesn't
Around six months the whole feeding picture changes, and several of the numbers on this site change with it. Worth understanding what shifts and what does not.
Wake Windows in Practice
Of all the numbers in infant sleep, the wake window is the one that changes days most. It is how long a baby can comfortably stay awake between sleeps, and…
The Numbers and the Baby
This site computes feeding volumes, sleep ranges, growth bands, nappy quantities, due dates and first-year costs. It is worth being explicit about what…
Nappy Sizes and Quantities, Planned Properly
Nappies are the most predictable recurring cost of a first year, which makes them one of the few things you can genuinely plan rather than react to.
How a Due Date Is Worked Out
A due date is presented with a precision it does not have. It is a single day derived from an average, and the overwhelming majority of babies do not arrive…
Keep Learning
Practical know-how on caring for a newborn, feeding and sleep in the early months, plain-language explainers on growth, milestones, and preparing for a baby, and gentle reassurance for first-time parents — everything you need to dig deeper into the first year.
Visit the Learn hub →