Due date calculator

Enter the first day of your last period using the drop down boxes below. If you don't know the exact date, estimate as close to that day as you can. The calculator will determine your estimated date of ovulation and also the expected due date of your baby.

Keep in mind that this is an estimate based on your last menstrual period and estimated date of conception.

As soon as you think you're pregnant, it's important that you contact your doctor or health care professional immediately.

Select First day of Last Period Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec / 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 / 08 09 10

Enter length of your cycle (in days): 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46