The Conception Calculator

Due in January: When Did You Conceive?

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

If your baby is due in January, conception most likely happened between April 10 and May 10 of the previous year.

Due January 1conceived around April 10
Due January 15conceived around April 24
Due at the end of Januaryconceived around May 10

Each of these is the most likely date for that due date; the real day can sit a few days either side. For your own date, see the day-by-day posts or use the calculator.

Try the conception date calculator.

Conception Date Calculator: Find the most likely conception date from your due date.

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