Baby Age Calculator – Calculate Baby's Age in Weeks, Months, and Days
The Baby Age Calculator computes your child's exact age from birth date in weeks, months, and days. The tool also indicates what developmental stage your baby is in and what skills they typically develop at this age.
During the first year of life, baby development is rapid, and doctors and pediatricians often track age in weeks. Enter your child's birth date to get their exact age today and a framework for upcoming pediatric appointments.
How Is Baby Age Calculated in Weeks?
Baby age is calculated in weeks from birth: 4 weeks doesn't equal 1 month—1 month is about 4.3 weeks. Pediatric checkups typically occur at 2 weeks, 2 months, 4 months, 6 months, 9 months, 12 months, 15 months, 18 months, and 24 months.
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Browse all tools →The baby age calculator tells the baby's exact age in weeks, months, and days from birth date. A handy tool for parents tracking baby's development and healthcare visits.
Enter the baby's birth date, and the calculator tells the exact age in weeks and months.
- See your baby's age in weeks, months, and days.
- Find out what developmental stage your baby is in based on age.
- Calculate corrected age for premature babies when needed.
Baby's age is often reported in weeks during the first months and then in months.
- At healthcare visits, age is reported in weeks for the first 3 months, then in months.
- Developmental milestone timings are approximate – children develop at different paces.
- For premature babies, corrected age gives a more accurate picture of developmental stage.
The age calculator is a tracking tool – development assessment belongs to healthcare professionals.
- Development concerns should always be discussed with healthcare providers.
- Every child develops at their own pace – comparison with others isn't necessary.
- Birth date isn't stored on servers – your privacy is protected.