The Conception Calculator

Conceived in March? Here's Your Due Date

Due dates & conception. Updated . Calculated with the standard pregnancy dating method used by ACOG and the NHS.

If you conceived in March, your due date will most likely fall between November 22 and December 22 of the following year.

Conceived on March 1due around November 22
Conceived on March 15due around December 6
Conceived on March 31due around December 22

How it's worked out

A pregnancy lasts about 266 days from conception, so adding 266 days to the conception date gives the due date. If you only know the month, the 1st and the last day give you the range.

For an exact date, use the due date calculator with the first day of your last period.

Due Date Calculator: Estimate your due date from the first day of your last period.

Open the calculator

This article is general information, not medical advice. Talk to a doctor or midwife about your own pregnancy or fertility.