Baby age and milestone calculators. Browse our free baby tools below — all calculators are instant, accurate, and require no sign-up.
Adjusted Age Calculator for Preemies — Calculate your premature baby's adjusted age by subtracting weeks born early from chronological age. Free preemie age tool.
Baby Age Calculator — Calculate your baby's exact age in months, weeks, and days from their birth date. Free online baby age calculator for parents.
Baby Clothing Size Calculator — Find the right baby clothing size by weight and age. Size chart from Preemie to 24 months with brand comparison tips.
Baby Growth Tracker Calculator — Track your baby's weight, length, and head circumference together. Multi-measurement growth tracker with WHO chart comparisons.
Baby Height Percentile Calculator — Check your baby's length-for-age percentile using WHO growth charts. Enter age, length, and sex for instant results.
Baby Proofing Cost Calculator — Estimate the cost of baby proofing your home. Cabinet locks, outlet covers, gates, furniture anchors, and more.
Baby Shoe Size Calculator — Find the right baby shoe size by age and foot length. Size chart from newborn to toddler with measuring tips.
Baby Sleep Schedule Calculator — Calculate ideal sleep hours for your baby by age. Get total sleep, nap, and nighttime recommendations from newborn to 3 years.
Baby Weight Percentile Calculator — Check your baby's weight percentile using WHO growth charts. Enter age, weight, and sex to see where your child falls.
Child BMI Calculator — Calculate your child's BMI and CDC percentile for age. For children ages 2-20. Enter age, sex, height, and weight.
Car Seat Guide Calculator — Find the right car seat type for your child by age, weight, and height. Rear-facing, forward-facing, and booster recommendations.
Diaper Rash Treatment Cost Calculator — Estimate the cost of treating diaper rash including barrier cream, prescriptions, and home remedies. Plan your baby care budget.
Diaper Cost Calculator — Calculate total diaper costs from birth to potty training. Estimate monthly and yearly expenses based on diapers per day and price.
Baby Nap Schedule Calculator — Generate a personalized nap schedule for your baby based on age, wake time, and wake windows. Plan naps from morning to bedtime.
Diaper Size by Weight Calculator — Find the right diaper size for your baby's weight. Size chart from Newborn through Size 7 with weight ranges and tips.
Stroller Cost Comparison Calculator — Compare stroller types and costs: full-size, lightweight, jogging, double, and travel system. Find the best value for your needs.
Pacifier Cost & Weaning Calculator — Calculate pacifier costs over time and plan a weaning timeline. Compare pacifier types and estimate total spending from birth to weaning.
Baby Wipe Cost Calculator — Calculate monthly and yearly baby wipe costs. Estimate usage from newborn to toddler based on wipes per day and per-wipe price.
Baby Wake Window Calculator — Find the ideal wake window for your baby by age. Avoid overtiredness with age-appropriate awake times from newborn to 2 years.