Pregnancy Week Calculator
Week-by-week pregnancy milestone tracker
Last Period
What is Pregnancy Week Calculator?
Pregnancy Week Calculator tracks your progress through all 40 weeks. Enter your due date or last period date to see your current week, baby size comparisons, and developmental milestones.
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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