Also written 42+5 or 42w5d
The short answer
42 weeks 5 days = 9 months and past your due date
At 42 weeks 5 days pregnant you are past your due date — day 299 of a pregnancy counted as 40 weeks, or 9 months.
Not sure of your exact week and day? The pregnancy week calculator works it out from your last period, due date or conception date.
You have passed the 40-week mark — 42 weeks 5 days is 19 days past 40 weeks. Most babies arrive within two weeks either side of the due date, and your provider will be monitoring more closely and discussing options such as a membrane sweep or induction.
Months of pregnancy are counted in uneven buckets of 4 to 5 weeks, arranged so that the full 40 weeks fits into 9 calendar months. Week 42 sits inside month 9, and it stays there for all seven days of the week — so 42 weeks 0 days and 42 weeks 5 days are both "9 months and past your due date pregnant".
If you want the strict calendar answer instead, divide by the real length of a month rather than by four: 299 days ÷ 30.4375 days per month = 9.8 calendar months. That figure drifts from the bucket-based month number, which is exactly why your care team sticks to weeks and days.
The days part matters clinically even when the month doesn't. Screening windows, term definitions and induction timing are all set by exact week and day — full term starts at 39 weeks 0 days, not "9 months". See the full weeks to months chart for every week.
Post-term. Very few pregnancies get this far — providers typically offer induction by now, and extra monitoring is routine.
Read the full week 42 breakdown →
| Week + day | Months pregnant | Days pregnant | Days to go |
|---|---|---|---|
| 42 weeks | 9 months and past your due date | 294 | — |
| 42 weeks 1 day | 9 months and past your due date | 295 | — |
| 42 weeks 2 days | 9 months and past your due date | 296 | — |
| 42 weeks 3 days | 9 months and past your due date | 297 | — |
| 42 weeks 4 days | 9 months and past your due date | 298 | — |
| 42 weeks 5 days (you) | 9 months and past your due date | 299 | — |
| 42 weeks 6 days | 9 months and past your due date | 300 | — |
At 42 weeks 5 days pregnant you are past your due date — day 299 of a pregnancy counted as 40 weeks, or 9 months. Months of pregnancy are counted as uneven 4–5 week buckets so the full 40 weeks fits into 9 calendar months, which is why the extra 5 days doesn't change your month number.
"42+5" is the shorthand your midwife or doctor uses for 42 weeks 5 days — the number before the plus is completed weeks, the number after it is completed days into the current week. You may also see it written 42w5d. Both mean exactly the same thing.
42 weeks 5 days is 299 days, counted from the first day of your last menstrual period (42 × 7 = 294, plus 5). You are now 19 days past the 40-week mark.
42 weeks 5 days is in the third trimester, which runs from 28 weeks 0 days until birth. You are already full term, which starts at 39 weeks 0 days.