How Do I Calculate My Menstrual Cycle?

How Do I Calculate My Menstrual Cycle?

How Do I Calculate My Menstrual Cycle?

How Do I Calculate My Menstrual Cycle?

Hello ladies, I know you might be wondering why I decided to put up this post. The truth is, some ladies still have no idea how to calculate their menstrual cycle. Not that they’re nonchalant or careless.

They just do not know how. I know of one such person, she’s in her early twenties and her flow still takes her by surprise every single month. Thing is, keeping track of your period is easy!

Keeping track of your menstrual cycle can help you prepare for your period and better predict when your next period will be.

By the end of this post, you will have learned how to count your period cycle and other helpful tips to predict when your period is coming.

Let’s get started! I’d show you how I do mine. All you need to get started is a calendar and a pencil.

Step 1: Write down the first day that you bleed.


The first day of my cycle was January 13.

Step 2: Write down any PMS symptoms, how long you bled for, and what your flow was like.


By keeping track of any PMS symptoms, we can use them to predict when our next period is!

Keeping track of how long you bled and whether your flow was heavy, normal, or light. will help us prepare for our period. This way you know how many and what type of pads/tampons to bring with you.

Sometimes it may not be crystal clear how many days you bled for because maybe you bled very lightly or spotted for the last couple days and aren’t sure which days to count. This is okay. It’s not important that you know exactly how many days you bled for. Just try to get a general idea of how long you bleed for.

I bled for 5 days. The first couple days were heavy and then became lighter. Leading up to my period, I had lower back aches and some cramps. During my period, I experienced cramps again and felt moody.

What are some PMS symptoms?

Before your period begins, hormonal changes in your body may cause other symptoms known as PMS or pre-menstrual syndrome. You can use these symptoms in addition to keeping track on your calendar to help you figure out when your period is coming.

Some of these symptoms may include:

  • Feeling moody or irritable
  • Lower back ache
  • Sore breasts
  • Cramps in lower part of your tummy
  • Ache along your inner thighs
  • Breaking out in acne
  • Headache
  • Constipation or diarrhea
  • Feeling bloated
  • Changes in appetite

You may not experience all of these symptoms or any of these symptoms at all. Every girl experiences a different set of symptoms.

Step 3: Write down the first day of your NEXT period


Step 4: Count the days!

How long is my period cycle? Help me count the days!

Count the days starting at the first day you bled to the day before your next period.


Did you get 28 days?

Step 5: Predict your next period.

Now that we know how long your period cycle is, we can just use it to count the days to predict your next period.


My period cycle is 28 days so if I count 28 days from February 10, that’s when my next period should come.

So I should expect my period to come on… March 10!

Will my period always come on time?

No, your menstrual cycle may not always come on time. The length of your menstrual cycle may vary from cycle to cycle. As you get older, the length of your menstrual cycle may even change.

Sometimes your period may be late and sometimes it maybe early. This is especially true during your first couple years of having your period. As you become older and more familiar with your body, you will develop a better understanding of when your period will come.

Starting your period is a huge step and this can take some getting used to for your body. You may find that your period is sometimes a day or two late or early or sometimes you may even miss a period all together. This is completely normal. (For those that are sexually active, keep in mind that a missed period may be an indicator that you are pregnant.)

Don’t worry! We can also use PMS symptoms to predict when our period will come.

As you become more familiar with your period, you will notice that you experience the same PMS symptoms leading up to your period.

For example, in step 2 I marked down that I had lower back aches and cramps.

If my period comes on time like I predicted, I should expect to feel these symptoms at around the same time again.

If I experience these symptoms earlier than I predicted, then I can predict that my period will come early.

If my period is late then I may expect to feel these symptoms later and expect my period soon after.

If you keep track of your period by counting the days and keep track of your symptoms, then you can use both to better predict and prepare for your period!

There you go sweetheart, easy as ABC.

MORE: How to have a pain free period: HERE and HERE

Image source: thePeriodBlog & 2

Nesiama Rephael
Fashion lover. Drama queen. Straight up weirdo.

You May Also Like


  • gloria December 3, 2015 9:05 am

    nice one I love it sometimes u just need to hear from ur fellow woman to feel u are not alone on it. tnx for d post. I wish someone can throw more light on d whitish discharge cause it confusing some said it is disease some say it not but I kow if it odorless and whitish it normally. but cream colour bad odor is bad

  • Brenda April 6, 2016 8:38 am

    Tnx I have finally gotten an answer to my question,for so many years I hv been battling with this. Just simple kudos to u

  • peniel jeremiah Inengite July 20, 2018 11:16 am

    pls.send me the different methods on how not to get pregnant after meeting my husband bcos family planning gailed before we had our last baby.tks

  • Praise edet September 3, 2018 1:29 pm

    Tnxs dear i really appreciate your information.simple as ABC…

  • Precious September 22, 2018 9:40 pm

    Thanks alot 4 dis post.

  • anonymous October 23, 2018 11:17 am

    They give a large ball park approximation. the best way to determine ovulation is with Ovulation Predictor Kits (sticks) OPK’s or taking the daily waking basal body temp. when you notice a THERMAL SHIFT sometime mid-cycle, your ovulation is going to happen. Sign up with and start charting!!! Otherwise, continue having sex every other day!!

  • Anonymous October 24, 2018 3:04 pm

    Nice one,tnx 4 d post.

  • anonymous October 26, 2018 6:58 am

    If you have gotten a BFN before a missed period you may still be PG. It’s not over until AF shows. Wait until the day after AF is expected and if she doesn’t show take another test. A lot of early pregnancy symptoms are similar to premenstrual symptoms so it may be hard to tell the difference. Each month I am surer I think I’m pregnant and then I’m not. Baby dust and good luck.

  • Hephzibah November 30, 2018 4:14 pm

    Thank u so much this it really cleared my wrong ideas nd confusion I heard tanks so much👍👍👍👍👍

    • Hephzibah November 30, 2018 4:18 pm

      Pls I also want to know how to calculate my ovulation period….

  • anonymous January 24, 2019 8:50 pm

    Are There No Drugs To Ease This Menstrual Pain

  • Clementina umaru gontur February 10, 2019 12:04 pm

    I start my period on 8th, then when is my ovulation starting

  • Juanita Layton May 4, 2019 7:14 am

    Uses the ovulation calendar calculator. There is a charting course there that you can take for free, and free software to chart your temps. The first day of your period is ‘cycle day 1.’ I typically ovulate on cycle day 12, but have actually ovulated on cycle day 10 before and as late as cycle day 15. This variation in ovulation days is why some women’s cycle lengths vary. The time between ovulation and your period (the ‘luteal’ phase) will not vary more than a day, maybe two. But the time between your period and ovulation can vary more than that. Chart a few cycles and you’ll see your own fertility pattern. Click here:

Leave a Reply