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Conceived in September: When Is Your Due Date?

If you conceived in September, your baby is most likely due in May or June. Find the date for each day below.

Or your ovulation / insemination date.

Your estimated due date, week of pregnancy and trimester will appear here.

Due dates for a September 2027 conception

A due date is about 266 days (38 weeks) after conception. The table shows the estimated due date for each day of September 2027. For other years the dates are the same or within a day.

Conception dateEstimated due date
Sep 1, 2027Wednesday, May 24, 2028
Sep 2, 2027Thursday, May 25, 2028
Sep 3, 2027Friday, May 26, 2028
Sep 4, 2027Saturday, May 27, 2028
Sep 5, 2027Sunday, May 28, 2028
Sep 6, 2027Monday, May 29, 2028
Sep 7, 2027Tuesday, May 30, 2028
Sep 8, 2027Wednesday, May 31, 2028
Sep 9, 2027Thursday, June 1, 2028
Sep 10, 2027Friday, June 2, 2028
Sep 11, 2027Saturday, June 3, 2028
Sep 12, 2027Sunday, June 4, 2028
Sep 13, 2027Monday, June 5, 2028
Sep 14, 2027Tuesday, June 6, 2028
Sep 15, 2027Wednesday, June 7, 2028
Sep 16, 2027Thursday, June 8, 2028
Sep 17, 2027Friday, June 9, 2028
Sep 18, 2027Saturday, June 10, 2028
Sep 19, 2027Sunday, June 11, 2028
Sep 20, 2027Monday, June 12, 2028
Sep 21, 2027Tuesday, June 13, 2028
Sep 22, 2027Wednesday, June 14, 2028
Sep 23, 2027Thursday, June 15, 2028
Sep 24, 2027Friday, June 16, 2028
Sep 25, 2027Saturday, June 17, 2028
Sep 26, 2027Sunday, June 18, 2028
Sep 27, 2027Monday, June 19, 2028
Sep 28, 2027Tuesday, June 20, 2028
Sep 29, 2027Wednesday, June 21, 2028
Sep 30, 2027Thursday, June 22, 2028

What this means for your baby’s birthday

A September conception gives due dates from May 24, 2028 to June 22, 2028. Because most babies are born within about two weeks of the due date, the actual birthday could fall in the month before or after. Conception dates are rarely known exactly: if you are working from intercourse dates, conception may have happened a few days later.

Other conception months

January · February · March · April · May · June · July · August · October · November · December

Know the exact day? Enter it in the calculator above or the Conception Due Date Calculator.

Frequently asked questions

If I conceived in September, when is my due date?

In May or early June — 266 days after the conception date. The table on this page lists each day.

How is a due date calculated from conception?

Add 266 days (38 weeks) to the conception date.

Conception Due Date CalculatorDue date from your conception or ovulation date.Conception Date CalculatorWork out when you conceived from your last period or due date.Due Date CalculatorEstimate your due date from your last period, conception date or IVF transfer.Baby Due Date CalculatorWhen will my baby be born? Birth month, sign and birthstone.Date CalculatorDays between dates, or add and subtract days, weeks, months and years.Pregnancy CalculatorYour week of pregnancy, due date, trimester and what is happening this week.

Formulas reviewed and page updated October 6, 2026.