Menstrual cycle     Ovulation kits     Ovulation signs     Pregnancy

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Using a Menstrual Cycle Calculator

Please select the first day of your last menstrual period:

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Usual number of days in your cycle:

If you want to stand the best chance of getting pregnant, then you need to know when you are ovulating. This is the time of the month that you are at your most fertile, and thus stand a greater chance of a sperm reaching the egg and fertilizing it. One of the biggest problems people have however is knowing how to calculate their menstrual cycle. This is where technology can come in useful. You can use items such as a menstrual cycle calculator which should provide you with a rough estimate about when you are next going to ovulate. Let me tell you a little about how these work.

Menstrual Cycle Calculators vary in complexity, some will ask you for information such as your average body temperature, as well as various other bits and pieces about what your body is currently going through. These types of cycle calculators often give the most accurate results, but many people find that they are ‘over kill’, and the majority of the information that they ask for is not something that people will have to hand readily, especially months of data about the subject. Therefore many women use simpler menstrual cycle calculators, which still give fairly accurate results.

The first thing that the menstrual cycle calculator will ask you is the date of your last period. Hopefully this should be information that almost any woman should be able to answer fairly easily. This will be the starting date of the last period and not the ending date.

The next piece of information that you will be asked for is the average length of time between your periods. This is the ‘length of the menstrual cycle’. Of course, the human body does vary wildly here, and whilst some months there could be 30 days between your period, and others it could be as low as 25. However, you are only after an average here. Do try to be as accurate as possible though as this will affect the results that you are given, and this of course will have a profound effect on what the calculator tells you is the ideal time to try for a child.

Finally you will be given your results. Generally you will be told the date of your next period, which should be fairly accurate. What you are going to be most concerned with however is the next ovulation period. This will be the time that you are at your most fertile and therefore stand the best chance of getting pregnant. What you do need to remember though is that the information isn’t 100% accurate as it is impossible to predict the human body, so ideally you would want to start having sex a couple of days before this, and a couple of days after.

Whilst they aren’t 100% accurate, the menstrual calculator is still a useful tool. It provides a ‘free’ way of knowing when you stand the best chance of getting pregnant, and this of course can be a god send for a couple who are struggling with this.

Learn more about Menstrual Cycle and how to to calculate it manually.

142 Responses to “”

  1. lovelyvillarta says:

    Hey my lmp was 6/30/2014 i had unprotected sex 7/14/2014 until now i still didn’t get my period its September already.i. been feeling exhausted these days,light cramps ,bloated and constipated. I took. Hpt two weeks ago it came out negative could i be pregnant??

  2. zara says:

    hi please help me, my period started last Aug 22, 2014 and finished on Aug. 25, 2014, we had love making on August 26,27 and 29. it is possible that i will get pregnant. please help me, i need an advice. Thank you

  3. dimple says:

    I would like to ask my last period was July 29 until now my period doesn’t yet come.I. had sex during safe days and during fertility but we make sure we had withdraw it.and after my men’s last July 29 it stopped Aug.1.but during Aug.2-6 I had little spotting .which I don’t know why but stopped when I put some medicine. Now ,is there a possibility I’m pregnant?thanks

  4. Shuga says:

    Hi I had my period on the 1 of august then on the 25.of august I had sex with protection ,but there was a problem and it torn now on the 28 of it I started seeing blood like am on my period please am I pregnant or what. I am 22 yrs old.

    • Clepetark says:

      Hi, odds that you might be pregnant are minimal, menstrual cycle is changing all along a women life and it is normal. To clear you mind out there is nothing better then to test yourself.

      Have a nice day !

  5. kayla says:

    Hey I need help my last period was on July 30 I had unprotected sex on the August 8 , 15 I’m on a 26 day cycle and I haven’t got big p could I be pregnant

    • Clepetark says:

      Hi , the 15 th was into your fertile window, the 8 th too early. If you delay, test yourself, with a pee on a stick test, dont forget to test yourself with the morning urine. Which will be much more concentrated in HCG hormone then any other during the day

      Good luck

  6. bless says:

    good morning.
    my cycle is 26 days. I had my period on 7/20/14. today is 8/22/14 already and I saw nothing yet en a drop and no sign of pregnancy as well. pls what should I do?

  7. asunta says:

    Help me!! So last month’s(July 2014) my period was playing games with my mind.. so my period was met to come date 16/07/14, I thought I was pregnant, I period was late for 9 days straight; then I has unprotected sex with my husband, but 10th day I started to bleed firstly it started light brown, and small amount;by the 3rd day of bleeding it got bright red color! ! And now it August period was met to come 19th-08-14

    • Clepetark says:

      Hi , I dont know what exactlly is your question but change in cycle during a women life is completelly normal, it follow the flow … flow of hormones, stresses , routine and conception tries

      Good luck

  8. Goe says:

    June 23-27 of 2014 period start and ended & July period was from July 19-29. when should I expect my next cycle

    • Clepetark says:

      Hi , future will tell but you seem to have a 27-28 days cycle, if you are a regular, but you need more then 2 month to screen it right. If there is on regular patern as many women you will be an irregular, meaning that you will not be able to predict when your perios will start, you will know by your symptoms, by example for me I feel severe lower back cramp an hours before starting to bleed. With the dates you put, I dont know if there is a mistake but you had a 10 days period last month and a 2 days the previous one .. that is a big sign of irregularity…

  9. Brit says:

    Hi the first day of my last period was july 12 2014 and Ive had unprotected sex about 6 times since July 22 2014 but I started my period today (August 6 2014) but im usually startin about the 12-14 every month and I’m wondering since I started does that mean I’m not pregnant. I’m also having lower back cramps and have never had this before.

  10. Victoria says:

    Good day sir,thank you for this information. i have a challenge that I am passing through right now. The challenge is,have being experienced longer menstrual period since January 2014, at times is 33,32, 31, 30 and 29. pls what can i do concerning this situation. have been trying to conceive but no positive result yet.

    • Clepetark says:

      Hi , the length of your cycle have nothing unusual nor being a reason to have difficulty to conceive. For cases like you for long cycle and irregular cycle there is a master rule to apply that can help you tracing your fertility window, that is located between day 11 and 17 of your cycle. Day 1 being the first day of your period. To be on the safe side having a longer cycle lets put your fertility window from day 11 to 21, in this window, have intimate contact with your partner no more than 1 day on 2, that way, you will have more mature spermatozoids in the womb at all time and if the egg is to be fertilised it will !

      good luck.

  11. Bekky says:

    Please reply me

  12. Bekky says:

    I used withdrawal method and saw my menses on the said time 30th June 2014.now I am suppose to see my period 28thjuly 2014..I saw the spotting s I usually have before the steady flow but there is none coming .please what is wrong with me?

    • Clepetark says:

      Hi , the retracting method is only 58% effective, it is most likely playing russian roulette, if you are serious about your contraception you should need a nurse of a family planning clinic for advise on what will suit you the best. Many woman will spot few days after conception when the egg attach to the womb itself, often mistaken for light period. In your case only a test will reveal what is going on. Some women will have bleeding like period for the first 3 months…

      good luck

  13. nature says:

    Hi
    I had sex during my most fertile period,which is 18th,but my husband didn’t come inside me, will i be pregnant.

  14. Linda says:

    My last cycle was on June 22,2014 and they last 5 days. Normal cycle is 30 days and I should have started on July 20,2014. I have had my tubes tied in 2009 . Is there a chance I could be pregnant? How long should I wait before I see my gyno?

    • Clepetark says:

      Hi , skipping a cycle can happen for other reason than pregnancy new gym routine, stress, exhaustion …. being tied up reduce significantly the risk that you might be pregnant depending of the technique they used. if they tied only or if they disconnected completely the tubes. more years you have your tube tied less chance you might be pregnant. If you have a doubt, at this point do a test !

      good luck

  15. lambert says:

    Hi,
    Could anxiety cause one not to get pregnant? Also is only on the second day of ovulation must one have intercourse in order to conceive? Help a worried husband.
    Thanks

    • Ana says:

      yes, stress can definitely impact the chances of getting pregnant. you should have intercourse few days before ovulation and during ovulation. find out more about improving the chance of getting pregnant in this article

  16. pam says:

    I was intimate with a guy in April but no sexual intercourse, saw my period that month and next which is always last week of a month/ 1st week of the next month. But june/july I experience more like spotting and period cause it stained my underwear and it lasted for 5 days. And its 12 days after and I feel I’m ovulating. Could that be my period or what? Pls I need a reply. So confused

    • Ana says:

      hey, yes, that could be your period, especially if you had more mental or physical stress in the last 40 days which may impact your cycle. if you, as you say, didn’t have a sexual intercourse then there’s no possibility of pregnancy.
      consult with your physician if you’re worried that there’s something wrong

      • pam says:

        Yea I experienced mental and physical stress which I’m still experiencing fear and ansiety at d moment. But is it possible for another period to show up 2wks after that?

        • Clepetark says:

          it is quite possible too, that you had a multiple ovulation month ! some women have a ovulation on demand mode, being in love, new relationship can made changes in your hormonal balance. If you can live with it ive you 2 more month to see if it will stabilise if not , you can always discuss about your concern with your physician

          Good luck !

  17. holly says:

    I had 2 periods in one month of june the beging and the end. june 28 is when I started again but didn’t know and me and my boyfriend had unprotected sex and im worried I might be pregnant

    • Clepetark says:

      Hi , getting pregnant while having period is rare but not impossible, it depends if you had an ovulation or not, personally I already got pregnant on my late period and I was explained back then that some women have what they call … ovulation on demand. Meaning that the only desire of conceiving can trigger an ovulation. If you are regular, make sure your period arrives on time, if not do a test.

      Good Luck

  18. Faith says:

    Had my last period the 2 June 2014 when is my next cycle date in July?

    • Clepetark says:

      Hi , the date of your next period will depend of the normal length of your personal cycle as it is different from one women to another. Normally it should be 28 to 30 days from the first day or your period to the first day of the next one.

      Good luck

  19. Mish says:

    Hi, i had sex on 13 july and the first day of my period was 2 july and lasted for 5 days, i have a regular cycle 25days am i safe?

    • Clepetark says:

      Hi ,

      Not safe, you ended being at the beginning of your fertility window. Protect yourself if you dont want to conceive at all time. As some women have more that 1 ovulation per cycle.

      good luck

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