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Menstrual Period Calculator & Calendar

  • Last Menstrual Period (LMP Date):
  • Menstrual Cycle Length :
  • How Many Days Did It Last:
Menstrual Calendar

Menstrual Period Calendar

Lmp Date :
Your Cycle :
Period Last Days :
Next Period BeginsEndsFertility BeginsOvulationDue date
(If Pregnant)
Email My Pregnancy Due Date Result:
Fertild Days  Fertile Days- Medium Chance Of Pregnancy
Ovaulation Day   Ovulation day - Highest Chance Of Pregnancy
   Period Days - Probably Infertile
  Safe Days- Low Chance of pregnancy
Period Calculator

Trying to find out when your period is due? Then you should use this period calculator so that you can plan your things better. You can get your personalized menstrual period calendar when you enter your details. This also helps if you are worried about your late period or irregular menses. Why hesitate when you can easily track your periods with this menstrual cycle calculator.

What Is Menstrual Period?

Menstrual period or menstruation is a woman’s monthly bleeding. This happens when you ovulate, and the egg is not fertilized. Therefore, your body sheds the endometrium (the lining of the uterus) causing bleeding. It flows from the uterus through a small cervical opening, and it passes out through the vagina. The bleeding lasts for three to five days. Menstrual period, also known as menses are a part of woman’s normal sexual health during reproductive age.

How To Calculate A Menstrual Cycle And Period?

Count the number of days from day one of your last period to the day before the following period. This calculation will not include the first days of the next period because it is day one of the next cycle.

Why Is Menstrual Period Important To Track?

It is important to track menstrual period and the cycle for some reasons. The more you understand about your body and the menstrual cycle, the more quickly you can know if something is amiss. A change in menstrual cycle is often a symptom of a variety of health issues in women.

It is also important to track the menstrual periods if you are planning to conceive or if you are trying to have a safe sex to avoid pregnancy.

The primary goal of tracking your monthly periods is to estimate the length of the menstrual cycle and assume the possible time of ovulation. If you are trying for pregnancy, you can have an intercourse around the ovulation time, and if you want to avoid pregnancy, you should abstain from sex for some days before and after ovulation.

Also when your periods become irregular, it may indicate health conditions such as thyroid issue, hormonal fluctuations, diabetes, liver problems, gaining or losing a significant amount of weight, extreme stress or adopting a new exercise routine. If irregular menstrual periods is coupled with any other symptoms, you should check with your OB-GYN.

Menstrual Period Calculator/Tracker – When Is My Period Due?

The menstrual period calculator gives you an estimate of when the menstruation happens. It, therefore, predicts the future periods and ovulation phase so that you may plan for a special event that is period-free.

It will provide you a rough estimate of the starting dates for the following 12 periods, i.e., over the course of the following year. You need to just give the first day of your last period and the average length of your menstrual cycle.

How To Use Menstrual Calculator?

It is quite simple to calculate period. You no need to buy a device or meet a gynaecologist to understand when your next period arrives. Enter the first day of your last menstrual period, the average length of the menstrual cycle and the average duration of the last period. Once you share all the above, it gives you an accurate result. It shows you the following menstrual date, ovulation phase, fertile phase and estimated due date. This is how you can calculate period and stop worrying about a period that ruins your plans.

It also shows a fertility calendar which allows you to prepare for your menstrual periods and fertile days in the following months.

Most Frequently Asked Questions Around Menstrual Cycle

Q. How to track your period manually?

All you need to have is a calendar to track your periods manually – a paper one or the one on your mobile or a computer.
  • Note the first day of your last menstrual period as day One.
  • Count the days in between before you start another period. Or you can just count 28 days.
  • Mark the last day that is when you are supposed to start your next period.
  • After a couple of months of marking likewise, you will be then able to figure out the actual menstrual cycle length, and you can calculate accordingly.

Another way is to keep track of the physical signs you experience in a period. Cramping, breast tenderness, white discharge are some of the common symptoms. The next time, when you start to experience such symptoms, you should be aware that your next period is going to start.

Emotional changes is another way to track your period manually. The fluctuating hormones alter your emotions such as feeling depressed, anxious or irritable for no apparent reason.

Q. Difference between Menstruation and Menstruation Cycle?

When a woman menstruates, her body discards the lining of the uterus. The blood flows from the uterus through a tiny opening, passing out the blood through the vagina. This is called menstruation.

A menstrual or period cycle is calculated from the first day of the period to the first day of the next period. An average menstrual cycle is 28 days long, but some women may have longer or shorter cycles. It can range from 21 to 35 days in adults and 21 to 45 days in teens.

Q. What factors may affect a woman’s menstrual cycle?

Several factors influence the date and flow of period. They include:

1. Diet And Exercise:
Exercise and diet can affect your period and your chances of pregnancy. If you are training for an athletic event and are not eating properly, your estrogen levels can drop, halting your period.

2. Weight:
Being too thin can also delay your periods, making your body think that you are not healthy enough for bearing a child. If you are overweight, excessive estrogen could build in your body, causing heavy or irregular periods.

3. Stress And Lifestyle:
Stress can mess badly with your cycle. Lifestyle habits like drinking and smoking can cause irregular periods.

Q. Can you speed up your menstrual cycle?

Here are a few ways to accelerate your menstrual cycle:
  • Take contraceptives on a regular basis. It can effectively regulate your menstrual cycle.
  • Some doctors recommend hormone injection to stimulate your menstrual cycle.
  • Sexual activity increases the blood flow to the genitals, stimulating the uterus to contract.
  • Eat high levels of vitamin C rich food. Vitamin C rich foods produce estrogen in the body and build the uterine lining, contracting the uterus and causing menstruation.

Q. How to find the safest days to have sex based on the period calculator to avoid pregnancy?

Calculating the safe period days is very simple. You have to know the last period date and determine the longest and shortest menstrual cycles by observing your menstrual cycle for the last six months. You can find it in the history section of your period calculator. Usually, days one to seven of the menstrual period are considered safe or infertile.

But if your menstrual period cycle does not fall between the 26th and 32nd day, then we’d suggest you try some other method.

Q. What to expect from MomJunction’s Period Calendar?

MomJunction’s period calendar requires you to input the date of your last menstrual period date to calculate your monthly period. The date here refers to the starting date of the last period cycle, not the ending one.

The second input requires you to give the average length of time between your periods. Since the term varies from person to person, it’s not wise to assume the figure. You must be as accurate as possible to determine your most fertile days if you are planning to conceive.

Once you’ve shared the inputs, the period calculator will show you the result. It won’t just give you a heads up on your next period start date for the next 12 cycles, but will tell you about your most fertile days and if you are late for your period cycle. Even if your period is delayed, you will know the next expected date of your period. This way, you can keep a track of the length of your menstrual cycle and the number of days it lasted.


The period calculator provides the approximate dates by considering your regular menstrual cycle. If your menstrual cycles are irregular, the tool may have trouble pinpointing your day of ovulation or period. While period calculators are not 100% accurate, the menstrual cycle is still a very useful tool. MomJunction is not responsible for any associated deviations, failures or liabilities.

Do you have any question about the period calculator, menstrual cycle or any other related topic? Ask us in the comment section below!

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