| Due Day | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 |
| Due Month | 1 - January 2 - February 3 - March 4 - April 5 - May 6 - June 7 - July 8 - August 9 - September 10 - October 11 - November 12 - December |
| Due Year (yyyy) | |
Please enter the due date and the calculator will return the 1st day of LMP and weeks of pregnancy.
40 weeks is the normal pregnancy time.