Pregnancy Weeks to Months Converter
Doctors count pregnancy in weeks, but most people think in months. This free converter turns your pregnancy weeks into months and your trimester instantly — so you always know where you stand in the 40-week journey.
How to use
- Enter the number of weeks of your pregnancy.
- See the equivalent in months and days instantly.
- Check which trimester the result falls in.
- Use this together with the due-date calculator to track your progress.
Tips
- Pregnancy is counted from the first day of the last period, about two weeks before conception.
- Months are approximate because they have different lengths — weeks are the precise unit doctors use.
- Full term starts at 37 weeks; a typical pregnancy runs 40 weeks.
Note
Pregnancy is usually counted as 40 weeks (280 days). The month count is approximate because months have different lengths — month = total days / 30.44. Estimate only — not medical advice. Confirm your real progress with your doctor.
Frequently Asked Questions (FAQ)
How do I convert weeks to months?
Enter your pregnancy week and any extra days from 0 to 6. The tool instantly shows the equivalent in months and days, plus your trimester.
Why do weeks and months not line up evenly?
Months have different lengths, so the month count is approximate; the tool divides total days by 30.44. Weeks are the precise unit doctors use.
When does full term start?
Full term starts at 37 weeks. A typical pregnancy runs about 40 weeks counted from the first day of the last period.
Is this medical advice?
No. It is an estimate for reference only. Confirm your real progress with your doctor.