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Conception and Due Date Chart

A month-by-month chart of conception dates, due dates and birth months — plus a calculator for any exact date.

Or your ovulation / insemination date.

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

Conception to birth chart

A due date is about 266 days after conception. This chart shows the due date for conception on the 1st and 15th of each month this year, and the birth month to expect:

Conceived in 2026On the 1st → dueOn the 15th → dueBirth month
JanuarySeptember 24, 2026October 8, 2026September – October
FebruaryOctober 25, 2026November 8, 2026October – November
MarchNovember 22, 2026December 6, 2026November – December
AprilDecember 23, 2026January 6, 2027December – January
MayJanuary 22, 2027February 5, 2027January – February
JuneFebruary 22, 2027March 8, 2027February – March
JulyMarch 24, 2027April 7, 2027March – April
AugustApril 24, 2027May 8, 2027April – May
SeptemberMay 25, 2027June 8, 2027May – June
OctoberJune 24, 2027July 8, 2027June – July
NovemberJuly 25, 2027August 8, 2027July – August
DecemberAugust 24, 2027September 7, 2027August – September

Choose a month for a day-by-day table: January · February · March · April · May · June · July · August · September · October · November · December.

Reading the chart

Conception usually happens about two weeks after the start of the last period, so a conception month corresponds to a last period in the previous two weeks. Most babies are born within about two weeks of the due date, so a due date near the start or end of a month could mean a birthday in the neighbouring month. For an exact date, use the calculator above or the Conception Due Date Calculator.

Frequently asked questions

How do I read a conception and due date chart?

Find the conception month (or date) and read across to the due date — about 266 days, or roughly nine months, later.

If I conceive in August, when is my due date?

Between late April and late May of the following year, depending on the day you conceive.

Conception Due Date CalculatorDue date from your conception or ovulation date.If I Get Pregnant Today, When Would I Be Due?Your due date if you conceive today — or on any 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.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.