Baby Age Calculator: Weeks, Days & Milestones

Calculate your baby’s age in weeks and days, months and days, or total days. Track milestones like 100 days or 6 months. informative and easy to use.

Baby Age Calculator

Baby's Age
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-- total days
Upcoming Milestones
ℹ️ Note: This calculator is for informational purposes only and is not a substitute for professional medical advice.

Calculations

We convert the time difference into standard baby age units.

$$ \text{Weeks} = \lfloor \frac{\text{Total Days}}{7} \rfloor $$ $$ \text{Remainder Days} = \text{Total Days} \pmod 7 $$

Example: If a baby is 80 days old:
$$ 80 \div 7 = 11 \text{ weeks and } 3 \text{ days} $$