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ovulation Calculator

Advanced Ovulation Calculator

Select first date of your last menstrual period

Average Length of Cycles ?

Luteal Phase (optional)

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Add Ovulation calculator to your website through which the user of the website will get the ease of utilizing a calculator directly. And, this gadget is 100% free and simple to use; additionally, you can add it on multiple online platforms.

Available on App

Download Ovulation Calculator App for Your Mobile, So you can calculate your values in your hand.

Ovulation calculator android app

What is ovulation?

Ovulation is the process which occurs in female bodies every month. In this process, an egg is released from the ovary. Every month hormonal changes occurring during menstrual cycle causes one egg to mature and release from the follicle/ovary. During ovulation period, your body produces increased amount of hormone called estrogen which triggers further the release of another hormone called luteinising hormone. This luteinizing hormone is the cause of release of an egg from the ovary the release of the egg takes place 24 to 36 hours after the luteinizing hormone level reaches peak point. That is why fertility window is best predicted by luteinizing hormone level around the time of ovulation cycle and this process is called the luteal phase.

Every month egg is released from one of the ovaries make its way to the uterus through the fallopian tube. It is the time when an egg can be fertilized by the sperm. But this egg can survive only for 12-24 hours while a sperm can live in the female body for up to 5 days. This time is of importance to those couples who want a baby. As there are many conditions which are not normal and will affect your fertility and ovulation.

Well, come to the point, in this article we are trying our best to helps you to understand all questions regarding ovulation. Read on and take a look!

About Ovulation Calculator:

This advanced ovulation calculator is a free tool that helps you to conceive 3x faster also helps an individual to perform free ovulation test online. More specifically, this exact ovulation day calculator will show the peak time of fertility to increase your chances of getting pregnant. Many couples keep trying to get pregnant but they don’t know about the fertility window. They try it again on the wrong days and then become hopeless. But, quit worrying, this ovulation time calculator will work as an ovulation estimator that shows exact ovulation date, fertile window, safe period, very next period date, expected due date, pregnancy test, intercourse window, next 6-month fertile period calendar along with important dates for the next 6 cycles. For some people, this tool is referred to as a fertility calculator as it also helps to perform a fertile period calculation.

Amazing Features Of Ovulation Calculator:

Yes, this calculator is loaded with amazing features, these are:

  • Ovulation Date: The calculator estimates the best time of conceiving in which the chances of getting pregnant are at a peak
  • Fertile Period: Our fertile window calculator shows the fertile period or the days in a woman’s menstrual cycle when pregnancy is possible
  • Safe Period: Our tool also works as a safe period calculator that shows the safe days after & before period to protect against unwanted pregnancy
  • Next Period Date: The calculator also works as a period calculator that tells the next date of your period
  • Estimated Due Date: It also helps to calculate your estimated due date (EDD) if you got pregnant
  • Pregnancy Test: The calculator recommends the estimated pregnancy date as well, it usually happens about 6 days after fertilization
  • Intercourse Window: It also works as an intercourse timing calculator as it tells when you have sexual intercourse with your partner to get pregnant
  • Fertile Days Calendar: Our fertile days calculator shows fertility calendar 3 to 6 months for a given input
  • Important Dates For The Next 6 Cycles: It also calculates the important dates for the next 3 to 6 months cycle, these are ‘period start’ ‘ovulation window’ or ‘due date.’

How To Use Ovulation Calculator – Step-By-Step:

We made this ovulation calendar & calculator free, simple & easy so that every woman can use it without being worried about her little knowledge about fertility. Anyone even your partner can enter the figures and get his wife ovulation date. Then they can try to have the maximum effort of getting benefit from the fertility period. The couple can have sex 4-5 days before and 2-3 days after ovulation date to get the best of the ovulatory period. And you cannot correctly calculate your ovulation time manually by using pen and paper. Try our fertility calculator to understand how to count your ovulation period.

All you have to enter is the month and date of your period or menstruation and your cycle length which every female knows about her menstrual cycle and then hit the calculate button. Within a few seconds, you’ll get the resulting ovulation date. You just have to follow the given steps:

  • First of all, you have to select the first date of your last menstrual period from the designated field of this calculator
  • Very next, you have to enter the average length  of your menstrual cycle into the given box
  • Then, you have to enter the luteal phase into the designated field. This advanced ovulation calculator with (luteal phase option) performs the ovulation test according to luteal phases length, but, this field is optional if you leave this field empty the calculator considers your average luteal phase about 14 days
  • Once done, hit the calculate button of ovulation predictor online to attain results for a given inputs


Our advanced Ovulation calculator can also help those couples who intend to have contraception without using medical devices, pill or procedures. As Ovulation day calculator can tell you the exact date of ovulation, you can keep yourself restraint from having unprotected sex. In this way, you can have natural contraception without using medical technology. But staying away from sex is recommended for the days of the whole fertile period that is 4-5 days before ovulation and 2-3 days after ovulation date. It can give you a record of your monthly fertile period and then you can plan for contraception accordingly. But we recommend you not to use only this ovulation period calculator for contraception purpose as it is highly risky as only one day during your fertile window can lead you to the pregnancy.

Benefits of Using Free & Accurate Ovulation Calculator Online:

  • We at calculator-online are providing you with the best, simple, accurate and free of cost fertility calculator. You can use it to become pregnant as it can tell you the exact dates on which there is a higher chance of getting pregnant. You can avail that time and give the exciting news of expecting to your home members
  • There are no complicated values to enter in this free ovulation test calculator
  • You can get the ease whenever you want to know your fertility-friendly dates
  • This accurate fertility calculator will work best for you when you are trying to get pregnant or when you are practising contraception without using medical procedures
  • It is a miracle tool once you use it you’ll have an idea how accurate is its ovulation test calculation
  • This free fertility calculator to tell you the exact dates of which there are high chances of getting pregnant
  • It can be helpful as in advancing medical technology most ordinary people can’t understand complicated terms and explanations regarding fertility and ovulation

Hope you are going to use this when you have planned for a baby, and you want to get pregnant. Using our advanced ovulation calculator online is the most reliable way of knowing your ovulation date.

Ovulation Symptoms

Apart from the ovulation calendar calculator, there are physical signs and symptoms of ovulation which you might notice and estimate the time of your ovulation (fertile days). These ovulation symptoms are:

  • Ovulation Pain: some women might experience sudden constant lower abdominal pain
  • Decreased Basal Body Temperature: your basal body temperature drops during ovulation. For this, you need to have a record of your daily body temperature at the same time of the day
  • Cervical Mucus: which change to clear and stretchy discharge during ovulation
  • Ovulation Spotting: some females have mid-cycle spotting, and this is due to ovulation
  • Cervical Position
  • Breast Tenderness And Sensitivity
  • Increased Sexual Drive
  • Feeling More Energetic

These ovulation symptoms can’t be noticed by every female. However, some can notice and track their ovulation time. It is helpful to know the fertility window and it can tell you when to try to conceive.

You cannot predict your ovulation day only by symptom as mentioned above. It is important to have a tool that can tell you your egg release date. Many couples are trying to conceive, but because of little knowledge about ovulation and fertility window, they are not able to get pregnant. We have good news for you people. We designed an Ovulation test calculator free which can tell you the date of your ovulation and you can try to get pregnant around these dates. By calculating your ovulation day, you can have a range of days in which you are fertile, and your partner can try to make you pregnant. These days will be 2-4 days before ovulation and after.

When Do You Ovulate?

Most of the time women ask a question on the internet that when do I ovulate? , here is the answer.

The fertility windows range from 6-8 days including ovulation days. Ovulation occurs on the 14th day of your menstrual cycle if you have regular cycles of 28 days. If your cycles are not regular and less than or greater than 28 days, then you might have to consult with the doctor. You can utilize the ovulation calendar to know the best time of conceiving.

Do You Know Your Days of Ovulation?

Yes – optimistic studies reveal that the most fertile days and the exact ovulation date will increase the chances of conceiving. Quit worrying, and utilize ovulation date calculator to unfold the question of when does ovulation start. Additionally, you can get a fertility calendar to determine the ovulation days to try for a conceiving.

Facts About Ovulation and Menstrual Cycle:

The regular menstrual cycle is imperatively important for understanding how to track your ovulation date, if your menstrual cycle is regular, then you have to track your ovulation days using simple ovulation tracker online. And, if not, then you ought to consult with your health care provider. When do women ovulate is the most common question that frequently asked by individuals, remember that ovulation occurs 14 days before the menstrual cycle starts. An ovulation calendar is a highly recommended tool to track ovulation days.

When Does Ovulation Occur?

  • If the average menstrual cycle of a woman is 28 days, then “ovulation will occur around day 14” and “the most fertile days are 12, 13, and 14.”
  • If the average menstrual cycles of a woman are 35 days, then “ovulation will occur around day 21” and “the most fertile days are 19, 20, and 21.”
  • If the average menstrual cycle of a woman is shorter or says 21 days, then “ovulation will occur around day 7” and “the most fertile days are 5, 6, and 7.”

You can utilize our simple ovulation predictor to know when are you most fertile!

Increases Your Chances of Conceiving Boy:

Ovulation calculator for baby boy is a reliable tool that helps to increase the chances of conceiving a baby boy. Optimistic studies reveal that you should have to sexual intercourse near ovulation as at the time the sperm count with male chromosomes has an advantage. Also, it is a fact that male chromosomes are quicker than girl chromosomes and readily penetrate the egg first.

So, get this online ovulation calculator for boy and get ready to become a mum of a baby boy.

The Study About X or Y Sperm:

Health care providers reveal that around 22 chromosomes that are found in a man’s sperm; it’s either an X- or a Y-chromosome. And, women egg contains 22 chromosomes plus an X-chromosome. Keep in mind, the gender of a baby can be determined with the sperm that fertilizes the egg. If there is a Y-chromosome in sperm, then baby gender will be XY, means you will conceive a baby boy. If there is an X-chromosome in sperm, then baby gender will be XX, means you will conceive a baby girl. You can utilize our reliable and best ovulation calculator girl to become a mum of baby girl.

Ovulation FAQs:

What Day of Ovulation Is Best to Conceive?

If you have sexual intercourse within a day or so of ovulation (releasing an egg from the ovary), then you are more likely to conceive. And, ovulation occurs 14 days or about two weeks after the first day of a woman’s menstrual cycle, if her cycle is around 28 days long. So, track your ovulation day using an accurate ovulation calculator free.

How Long Does Ovulation Last?

It lasts for 1-2 days (12 to 48 hrs) but overall potential fertile window lasts for 7 days which includes 2 days before ovulation and 2 days after ovulation date. You can use our ovulation predictor to track your fertile window.

How Do I Calculate My Ovulation?

If you want to calculate your ovulation manually, then you to remember that, the length of a woman’s menstrual cycle is the number of days from the first day of bleeding in her last period, to the very first day of bleeding in her next. From this figure, you ought to subtract 14 days from the end of your current menstrual cycle to figure out the approximate day you ovulate.

How Many Days After Your Period Do You Ovulate?

In straightforward words, a woman ovary releases an egg (ovulation) about 14 days/two weeks before her period starts. The first day of a woman period, when bleeding starts is counted as the first day of her cycle. If a woman has a 28-day cycle, then she will usually ovulate sometime within day 10 and day 15 of your cycle.

How Do I Know If I Am Fertile Enough to Get Pregnant?

If your menstrual cycle lasts and your period comes like clockwork, then you are more likely ovulate on the day 14, these 2 weeks are a halfway through your cycle, and your fertile window starts on day 10. If you have sexual intercourse at least every other day between days 10 and 14 of a 28-day cycle, then you are more likely to get pregnant.

What Are The Signs of Fertilization After Ovulation?

No doubt, early symptoms of pregnancy are quite similar to the symptoms that experienced around the time of ovulation, during PMS (Premenstrual Syndrome), and by those taking fertility medications.

These signs refer to:

  • Breast Tenderness
  • Bloating
  • Food Cravings.
  • Increased Nipple Sensitivity
  • Headaches And Muscle Aches

How Do I Count My Safe Days?

Well, if you want to count your safe days, then you have to stick on the ovulation calendar method or get the detailed calendar of your cycle with the ease of our menstrual cycle ovulation calculator. Let us elaborate it with an example:

If a woman shortest cycle is 26 days long, then she has to subtract 18 from 26, and as a result, she will get 8. Right after, count 8 days starting from day 1 (the very first day of her period). If a day 1 has been on the 4th of the month, then she will mark X on the 11th. So, remember that 11th is her first fertile day of this cycle, so on that day, she should have to stop having vaginal sex or begin using another method of birth control.

Well, to predict the last fertile in your current cycle:

  • You have to find the longest cycle in your record
  • Then, you have to subtract 11 from the total number of days in that cycle
  • Very next, you ought to count that number from day 1 (the very first day of your period) of your current cycle, and then mark that day with an X. (include day 1 when you are counting)
  • The day that you marked as X is your last fertile day

Also, you can enter the values into the safe period calculator to get an idea about your safe days after and before period.

Can You Get Pregnant 3 Days Before Ovulation?

Keep in mind; you have more chances to get pregnant if you have sexual intercourse during the five days before ovulation or on the exact day of ovulation. But, according to experts, the most fertile days are the three days leading up to and including ovulation. So, increase your chances of getting pregnant by having sexual intercourse during this time.

How Long Does It Take For The Sperm to Meet The Egg?

Optimistic studies reveal that a man can ejaculate between 40 million to 150 million sperm that begin swimming toward the fallopian tubes on their mission to fertilize an egg. Studies found that the fast-swimming sperm can reach the egg in a half an hour, while remaining may take days. And, remember that the sperm can live up to 48 to 72 hours.

Are Ovulation Calculators Accurate?

No doubt, these calculators are works as an ovulation estimator and they are a good indicator for women’s who have a regular menstrual cycle. The results that you’ll get from these tools may also be skewed if you have just come off the pill, or you are unsure on when exactly your last period was, or your periods are irregular.

Can I Ovulate During My Period?

Here, what is being considered a period? Menstruation or a period is the bleeding that happens when the endometrium is shed 12 to 16 days right after ovulation. With this statement of a period, women cannot ovulate while on their period.

However, there are some women who experience mid-cycle or ovulatory bleeding (it is the bleeding that happens around ovulation) and can mistake it for a period. This can only be seen in some women who have a very irregular menstrual cycle, maybe coming once every 3 months or 2-3 times in a single month, although it can happen in women with regular menstrual cycle as well. These women may experience this as a period, but, in real term, this is most likely ovulatory bleeding. Ovulation can take place when a woman experiences mid-cycle or ovulatory bleeding. If you are also experiencing such condition, you can use the above most accurate 3 months ovulation calculator.


Our ovulation or fertile days calculator is work as an ovulation predictor online that is not suitable for women who are already pregnant. It cannot or should not be taken into account for preventing pregnancy. We designed this ovulation tool for educational purposes only and the outcomes that you will get with the ease of this tool is just an estimation. So, you should have to consult with your MEDICAL Expert for better advice.


American Preganncy Association – Understanding Ovulation

What else can help you get pregnant? – Your Fertility

Reviewed By Colleen de Bellefonds – 7 Signs of Ovulation

Medically reviewed by Debra Rose Wilson – Facts About Ovulation

Medically reviewed by Holly Ernst, PA-C – Exact Ovulation Guide


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