Pregnancy Week Calculator
Week-by-week pregnancy milestone tracker
Last Period
What is Pregnancy Week Calculator?
Pregnancy Week Calculator shows detailed information about each week of pregnancy. Enter your due date or last period date to see exactly where you are in your journey, with baby size comparisons and developmental milestones for each week.
How to use
- Step 1 — Enter either your due date or the first day of your last period.
- Step 2 — See your current week number with a visual progress bar through all 40 weeks.
- Step 3 — Read week-specific details about baby development and what to expect.
Result
At 20 weeks, the tool shows you're halfway there. Baby is the size of a banana, weighs about 300g, and you may start feeling kicks this week.
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