Ovulation Calculator

Are you trying to get pregnant or planning on it in the near future? If so, you can greatly improve the likelihood of getting pregnant by determining when you will ovulate next. Ovulation is the release of a female's ripe egg from her ovary. When this occurs, you are the most fertile.

Use our Ovulation Calculator to estimate your next ovulation date; simply enter the first day of your last menstrual period and the average length of your cycle. Because our tool provides you with only an estimate, consider yourself the most fertile during the period of 3 days before and 3 days after the estimated ovulation date. Best of luck!!

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

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

Estimated Ovulation Date:

Tell us what you think!


  1. Avatar of hope hope says:

    I need help I am trying for a boy I had a iud for 2 years n in April I got taken out n now I don’t don’t know when I ovulation plz someone help

  2. Avatar of NezekaMbeki NezekaMbeki says:

    Please help me who ll b the father if i sleep wit my Boy friend on the 24 up2 29 of April 2013 and slp wit anada Boy frnd on the 4th of May 2013. last 1st date of Periods was 15th April usually cycle length its 28 Thankx in advnc

  3. Avatar of Olivia Olivia says:

    ovulation is hard one to predict with just a computer tool, monitoring cervical fluid, checking cervix, charting and temping and using opks is the best way to predict your ovulation!

  4. Avatar of dimples dimples says:

    hey I am confused as in to when I conceived, my last period was on the 27th of February 2014, the ultra sound says I am due 15 December and the mid wife says 30 November please help understand as I am confused

  5. Avatar of Denise Denise says:

    Kinda stuck on when I conceived? My LMP was March 24 2014.. Did I get pregnant before or after my period? My due date is 12/29/2014.. Help so confused

    • Avatar of Megan KlayEditor Megan Klay says:

      Hi Denise – Most women ovulate between day 11 and day 21 of their cycle. If your cycle is normally between 28-32 days, you likely ovulated 12-16 days before what would have been the first day of your next expected period. You can also count back from your due date, which would put your conception at sometime in early April. I hope this helps!

  6. Avatar of michelle michelle says:

    Very confused… 7/12 started using clear blue advance ovulation kit and got an empty circle. 7/13 tested again and got a high with a flashing smile face.7/14 had small spotting color brown and a peak Solid smile face… now rhis Saturday I got another peak on opk so idk what to think… been trying to conceive 15 month s

  7. Avatar of shalahea shalahea says:

    So does any one know if the fertility friendly lubricant pre seed work? I used it all this week with the ovulation days. Im hoping it worked but i wanted to has anyone used it and got sucess

  8. Avatar of keionna keionna says:

    I never knew about ovulation days or anything until like recently. soo me and my boyfriend had sex on the 18th of june one of my ovulation days and i believe im pregnant. i get signs wen my period finna start but this moth i got the signs no period my boobs hurt im always nauseous i crave food alot and i be dizzy at times on here it says that i should be a week and 3 days pregnant um can i take a test now or should i wait a full 2 weeks ?

  9. Avatar of Kelly Kelly says:

    When I used the ovulation calculator 4 yrs ago, it actually gave you an actual calendar to show you your fertile days and literally told you what days to have sex. What happened to that?

  10. Avatar of Stephanie Stephanie says:

    Me and my boyfriend had sex on 5-10 and 5-13. According to the ovulation calendar 5-10 was my estimated ovulation date. I have been using the 7 day ovulation test that continues to come back with no LH Surge. Could I be pregnant? I have been cramping the past 2 days and feeling nauseated. Should I just wait until the 23rd to see what happens since that is when my monthly is due to come.

  11. Avatar of brittnie brittnie says:

    I am as of now 1 day late

  12. Avatar of brittnie brittnie says:

    A little guidance would be greatly appreciated, or if someone was in a similar situation your input would help. My LMP was April 19, according to the ovulation calculator the date I ovulated was May 3. My BF and I had sex April 28, and 29. Yesterday (05/17) the day I was due to start my period, I woke up and started having really bad stomach pains and I vomited twice. I took 2 pregnancy test , one two days before my period and one on my period’s due date. the first test had a faint positive line, and the second test showed negative. I don’t have any symptoms other than nausea, vomiting, I sleep as well. no tender breast etc. could I possibly be pregnant, and could I have tested early?

    • Avatar of Jennifer Jennifer says:

      When I first thought I was pregnanti took a test and the same thing happened to me. I got a positive with a faint line. So as excited as I was I went to the store after work and bought a pregnancy test with 2 tests inside. I decided to wait to the next day before trying again. Both tests came up negative,but I knew something wasn’t right. I made a dr appointment for their test a couple days later. I WAS PREGNANT! : ) Im glad I was patient and waited to go to the draw because I would have went broke buying pregnancy tests from the pharmacy. Lol ( note: I was only 2 days late when I went to the dr)

    • Avatar of Megan KlayEditor Megan Klay says:

      Hi Brittnie – You very well could be pregnant! False negatives are more common than false positives. Give it another day or two and test again. We have several articles on early pregnancy tests and signs you may also want to read through: http://www.everydayfamily.com/pregnancy-tests-signs/. Best wishes for the test result you’re hoping for!

  13. Avatar of kitty kitty says:

    I feel so confuse I had my period march 23rd and I have sex april 1st and april 11th but he did not cum inside and I took a pregnancy test april 28th and it was positive trying to find out when did I concieve.

  14. Avatar of Michelle Michelle says:

    When they ask about ur last menstrual period do they mean thr day u started r the day it ended

  15. Avatar of Brittany Brittany says:

    Can someone please tell me if the *AVG LENGTH OF CYCLE means average length of my period OR the length of days I’m NOT on my period????

  16. Avatar of Jessica Jessica says:

    My last period was Dec.22 but I’m not pregnant…what’s wrong with me?!

    • Avatar of Megan KlayEditor Megan Klay says:

      Hi Jessica – I’d recommend making an appointment with your doctor. This could be because of your birth control, nutrition/fitness, stress levels, or something else. Your doctor will be able to offer suggestions/tests to help. Best wishes!

  17. Avatar of chantal chantal says:

    please can you give me some advice, I am trying to get pregnant for the last several years.i have been for check ups and all are clear.i was on the depo injection for about 4 years. do you think that could be preventing me from getting pregnant, if so what can I do.

  18. Avatar of Justine Justine says:

    Can someone help me, my last period was on feb 27-mar 2 I had intercourse the 13th on ovulation… I’m having really bad stomach & pelvic pains & I don’t get cramps during pms, what’s the chance of me having a bun in the oven?

  19. Avatar of dora dora says:

    being a mother is a full time job but i will be glad to do it again in a second

  20. Avatar of Kayla Kayla says:

    Ok I had my period febuary the 1st and it lasted till the 5th. They say my due date is november the 8th. When did I conceive because idk when I ovulated.

  21. Avatar of sarah sarah says:

    I started on 2/14/2014 n i ended like a week and 2days after i started…does this mean that i might b prego? My 1st pregancy i believe i did the same thing…plus ive been feeling sick not n the morning but like afternoon or in the evenings….do u think im prego?

  22. Avatar of Cait Cait says:

    This calculator and the due date calculator give me two different days, but supposedly ovulated on the 4th so now we have the two week wait.

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