Due Date Calculator

How the Pregnancy Due Date Calculator Works?

Are you dying to know when your baby is due? Use our handy due date calculator to estimate your baby's due date. If you'd like to learn more about your current stage of pregnancy, you can look up your week of pregnancy in our Pregnancy Week by Week section.

*Last Menstrual Period:
(MM/DD/YYYY format)

*Avg. Length of Cycles:
(22 to 45) (defaults to 28)

*Avg. Luteal Phase Length:
(9 to 16) (defaults to 14)

Estimated Conception:

Estimated Due Date:

Estimated Fetal Age:

Tell us what you think!

367 comments

  1. Avatar of Ulyssa Ulyssa says:

    My doctor said my due date would be Sept. 28, 2014, the due date calculator predicted Sept. 23, 2014 and my baby was actually born Sept. 21, 2014. The calculator was closer than the doctor was XP

  2. Avatar of marissa marissa says:

    Pregnant yet again..
    Bby #4.. due May 31st

  3. Avatar of BrieAnna BrieAnna says:

    If my last menstrual period was March 26, 2014 why’s my due date January 9, 2015?? Please help I think my doctor is so off and he’s really due dec/31st

    • Avatar of Megan KlayEditor Megan Klay says:

      Hi BrieAnna – I would just give your doctor’s office a call or ask them to breakdown the dates for you at your next visit. You can mention that you’ve used an online calculator and it gives you a different due date and say you’re just hoping for some clarification. Congrats by the way!

  4. Avatar of Christina Christina says:

    The fourth baby I’m ready now

  5. This says October 15th and the ultrasound tech said October 30th. Uh, I’m going with the 15th. The sooner the better!

  6. Avatar of Michelle Michelle says:

    My due date was off by 3days my ultrasound said I was due on February 14,2015. Now to see if the gender prediction is correct. Hope to find on on September 17 at my next appointment

  7. Avatar of Toni Toni says:

    You got the same due date as my doctor. April 4, 2015. I am happy with my results from your due date calculations.

  8. Avatar of 3plates 3plates says:

    i was given 2 due dates by ultrasound which is September 19 and October 8 which one should i follow? please help am confused

    • Avatar of Megan KlayEditor Megan Klay says:

      Hi there – If you know the first day of your last menstrual period, and your average cycle length. This due date calculator should be able to give you a pretty accurate estimation. Best wishes!

  9. Avatar of cassie cassie says:

    Havent had my first dr appt yet but judging from my LMP and using the due date calculator im about 7 weeks. However, my periods arent always to the day, usually withing the week though. I have a feeling I may be a little further along, perhaps had a period while pregnant?? Ive had issues with acne and constipation the month before we found out we’re expecting and that is abnormal for me; especially considering I took probiotics dforor about 3 weeks and very little BM’s. Oh and I started gaining weight without a change in diet or habbits so those are my reasons I believe I May be further along. My first dr appt is the 7 so pray all is well…or for twins :)

  10. Avatar of Ivonne Ivonne says:

    I honestly thought my cycle was off, because of the stress I was undergoing. However, I was wrong, but I am happy I was able to find out at an early stage, so I can take all proper precautions.

  11. Avatar of Cheyenne Cheyenne says:

    My fiance and I have been together in and off for 5 years. We have a daughter and he has another daughter. I am currently expecting my second child with him however, he recently got out of prison after doing an 18 month bid. He got out about nine weeks ago, I’m eleven weeks pregnant. The baby is his for certain but he’s having trouble understanding how pregnancy works. I explained it many times. Any suggestions.

    • Avatar of Renae Renae says:

      Take him to appt let doctor explain.. that helped my husband. Also the magazine showing baby growth from egg to fertialization all helped his comprhension

    • Avatar of cassie cassie says:

      They count the weeks starting the first day of your last period even though you arent technically pregnant yet, they count the time where its Just the fertile time when the sperm has a better chance of getting you pregnant. They Say your so many weeks pregnant but there isnt an embryo until 2-3 weeks later after the sperm has fertilized the egg during the fertile time (which is the 2-3 weeks after the first day of your last period) Basically they count your period and the time in between until his sperm makes everyhing happen :) Maybe if he reads this he can understand??

  12. Avatar of myeisha myeisha says:

    Hi everyone,I am new on here and am currently 14weeks pregnant and wanted to know if anyone was experiencing frequent urination still and have you started feeling quicking(which I started feeling tthis around 12weeks) I currently have two other children.

  13. Avatar of sara sara says:

    i am 8 weeks tomorrow and i am 39 years old i am very scared hope everyone has a blessed pregnancy

  14. Avatar of Elizabeth Elizabeth says:

    I am newly pregnant but I dont remember the exact date of my last period. All I know is it was at the end of May like it is everytime. Always at the end of the month. I dont know the conception date exactly. All I know is that we started tryin on June 9th and I finally passed a test last week. The only thing diff is I have felt feverish, really bad mood swings, itching, discharging, and a weird rash on my kneck. When I was pregnant with my first I was always sick and had headaches right at the beginning. The headaches are very minor and random now. Id like to know a possible due date and id also like advice on how to get rid of this rash and the itching please lol.

    • Avatar of Megan KlayEditor Megan Klay says:

      Hi Elizabeth – Your due date will be nine months plus two weeks out from when you started trying, roughly. So sometime around the end of March 2015. :) I’d recommend you try coconut oil on your neck.

  15. Avatar of Shanai Shanai says:

    I am not really sure of my last menstrual I have a terrible memory sad but true an for the life of me I cannot remember how can I get a due date

  16. Avatar of Alyssa Alyssa says:

    is it weird that i am around 13 week and havent had an ultrasound yet or been given an estimated date of birth?

  17. Avatar of Colette Colette says:

    I’m so happy that I finally found a forum that’s so recent, congrats to all mothers to be I’m hoping for a girl

  18. Avatar of brendapender brendapender says:

    Im 27 weeks and my fiance and are expecting a baby girl we have 2 boys im very excited and patiently waiting to meet her.

  19. Avatar of Talisha Talisha says:

    I’m expecting a girl- 7/21/14 is my due date. I’m 29 weeks and patiently awaiting her arrival!

  20. Avatar of Amber Amber says:

    I am 7weeks pregnant with my first, and am super excited!!! Oh, and super sick. I was told due to my severe endometriosis, I wouldn’t be able to carry….. But I’m doing good and judging by how sick I’ve been, baby is doing great!!

  21. Avatar of Tiffany Tiffany says:

    I’m 16 weeks, and I had my monthly check up Monday. My doc brought in a pocket ultrasound, and it sure looks like we’re having a boy. I have 3 daughters so I’m hoping what I seen was correct. Doc says looks like I can throw out all my 2 year olds baby clothes now. But I’ve already donated them along time ago.

  22. Avatar of Arianna Arianna says:

    I just want to know am I having a boy or girl..i had 2 dreams of a little boy.1 before I found out I was pregnant and another 2 months later..im 10 weeks and 1 day

  23. Avatar of Patricia Patricia says:

    This is my first baby and my mother and I have a strong feeling its a girl and If it is then I will name her Isabella rose

  24. Avatar of Prentiss Prentiss says:

    We are having a boy. This will be our fourth boy. We were kinda hoping for a girl for our last pregnancy, cause I’m having a tubal. As long as he’s healthy we will show him nothing but love.

  25. Avatar of Lora Lora says:

    This is my first baby and it’s a boy!!!

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