Due or born in August: when was the baby conceived?
A baby due in August was most likely conceived between 8 November and 8 December of the year before.
For a baby born in August at full term, from 37 to 42 weeks, conception was most likely between 25 October and 29 December of the year before.
Most likely conception date
Enter a date to see when conception most likely happened.
Not medical advice. Every pregnancy is different: ask your midwife or doctor about yours.
Conception date for each day in August
| Due date or birthday | Conception, for a due date | Conception, for a birth at 37 to 42 weeks |
|---|---|---|
| 1 August | 8 November | 25 October to 29 November |
| 2 August | 9 November | 26 October to 30 November |
| 3 August | 10 November | 27 October to 1 December |
| 4 August | 11 November | 28 October to 2 December |
| 5 August | 12 November | 29 October to 3 December |
| 6 August | 13 November | 30 October to 4 December |
| 7 August | 14 November | 31 October to 5 December |
| 8 August | 15 November | 1 November to 6 December |
| 9 August | 16 November | 2 November to 7 December |
| 10 August | 17 November | 3 November to 8 December |
| 11 August | 18 November | 4 November to 9 December |
| 12 August | 19 November | 5 November to 10 December |
| 13 August | 20 November | 6 November to 11 December |
| 14 August | 21 November | 7 November to 12 December |
| 15 August | 22 November | 8 November to 13 December |
| 16 August | 23 November | 9 November to 14 December |
| 17 August | 24 November | 10 November to 15 December |
| 18 August | 25 November | 11 November to 16 December |
| 19 August | 26 November | 12 November to 17 December |
| 20 August | 27 November | 13 November to 18 December |
| 21 August | 28 November | 14 November to 19 December |
| 22 August | 29 November | 15 November to 20 December |
| 23 August | 30 November | 16 November to 21 December |
| 24 August | 1 December | 17 November to 22 December |
| 25 August | 2 December | 18 November to 23 December |
| 26 August | 3 December | 19 November to 24 December |
| 27 August | 4 December | 20 November to 25 December |
| 28 August | 5 December | 21 November to 26 December |
| 29 August | 6 December | 22 November to 27 December |
| 30 August | 7 December | 23 November to 28 December |
| 31 August | 8 December | 24 November to 29 December |
In a leap year, the date moves by one day when 29 February falls between conception and the due date or birth.
Frequently asked questions
If our baby is due in August, when did we conceive?
A baby due in August was most likely conceived between 8 November and 8 December of the year before. That is 38 weeks (266 days) before the due date. The table on this page gives the date for each due date in the month.
Born in August: when was the baby conceived?
For a baby born in August at full term, from 37 to 42 weeks, conception was most likely between 25 October and 29 December of the year before. For a birth at exactly 40 weeks, it is the same date as for a due date that day.
Can a conception date settle a paternity question?
No. This is the textbook estimate. It cannot know your cycle, when you actually ovulated or how the pregnancy was dated, and it is not precise enough to tell apart two dates a few days apart.