Weeks ↔ months

40 weeks pregnant in months

Week 40 of pregnancy falls in month 9 on the nine-month split Nawah's guide uses (weeks 33–40). In calendar terms, 40 weeks is 280 days, about 9 months and 6 days.

Pregnancy monthMonth 9 of 9
In days280 days
In calendar months9 months 6 days
Until week 40Past week 40

Why the two numbers differ

Pregnancy months are not four weeks each: nine months of about 4.4 weeks add up to 40 weeks, not 36. That is why doctors count in weeks, and the month your family names is an approximation.

Read the guide to month 9 →

Track more than one number

The Nawah app saves all of this automatically — week, weight, movements and contractions — in one place.

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Every week

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42

This guide is general information, not medical advice. It does not replace a doctor, and it knows nothing about your particular pregnancy. If something feels wrong, contact your doctor instead of waiting for the next scheduled visit.

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