about .com/cs/ pregnancycalendar /l/blpregcalc.htm
AWESOME pregnancy due date
calculator site, tells you what day you start what week too! It also tells you what day you'd get a positive pregnancy test, 1st heartbeat, viability, quickening (???) and the date of conception...it's actually right for my day of conception if I were pregnant right now, which is odd because it doesn't ask for cycle length and I have a 29-31 day cycle....hmmm. Coincidence or not?