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Ovulation date

Ovulation Calculator
When did your last period start?
E.g. 18/01/2020
Usually, how long is your cycle?
Cycles typically vary from 23 to 35 days
Estimate your ovulation day
likelihood of ovulating today
Due to your cycle length, unfortunately we can't estimate an ovulation probability. We recommend that you use a Digital Ovulation Test to accurately detect your most fertile days.
Start of your last period
Likelihood of ovulating on this date
Change my informations
In partnership with Clearblue®.
Results are based on the information you have provided and data from the publication below: Sarah Johnson, Lorrae Marriott & Michael Zinaman (2018): “Can apps and calendar methods predict ovulation with accuracy?”, Current Medical Research and Opinion, DOI:10.1080/03007995.2018.1475348
Ovulation date
Ovulation date

What is an ovulation calculator, and how may it assist you in conceiving?

This ovulation calculator, often known as an ovulation calendar, will assist you in determining your most fertile period. These are the most likely days for you to become pregnant.
If you become pregnant within your next fertile days, it can also estimate your due date.

Ovulation Symptoms

A thermometer measures a rise in basal body temperature of 1/2 to 1 degree.
Increased luteinizing hormone (LH) levels, as tested by a home ovulation kit
Cervical mucus, or vaginal discharge, might resemble raw egg whites in appearance, being clearer, thinner, and stretchier.
Your vaginal mucus may become clear, slick, and slippery a few days before ovulation, and it may feel like egg white.
This is an indication that ovulation is approaching. It's the perfect moment to have sex since sperm can readily move through this type of mucus.
soreness in the breasts
Spots of light
Your side hurts or cramps a little.
To test your urine for symptoms of ovulation, use a predictor kit from a supermarket or pharmacy. A positive result implies you'll ovulate within the following 24 to 36 hours if you start testing your pee a few days before your next expected ovulation date (one to two days).

The truth about ovulation time

When a mature egg is released from the ovary, it is called ovulation. After then, the egg travels through the fallopian tube to be fertilized. If sperm are present in the fallopian tube when the egg is released, the egg is likely to be fertilized, resulting in an embryo that can grow into a baby.
Pregnancy is only technically feasible if you have intercourse five days before to ovulation or on the day of ovulation. The three days preceding up to and including ovulation, however, are the most fertile. Having intercourse during this period increases your chances of becoming pregnant.
Because the egg is no longer in the fallopian tube 12-24 hours after ovulation, a woman cannot become pregnant during that menstrual cycle.
If you have intercourse before or after the fertile window, you have absolutely little chance of becoming pregnant (but don't rely on this if you're not intending to get pregnant — contraception is your best option!).

When do you know you're ovulating?

Knowing when you ovulate might help you timing your intercourse and increase your chances of becoming pregnant. You may keep track of your menstrual periods using a chart, a notebook, or a free smartphone period tracker app.
Record the first day of bleeding to determine the length of your menstrual cycle (first day of your period). This is the first day. The day before your next period begins is the last day of your cycle.

What is the difference between a'menstrual cycle' and a ‘period'?

Some individuals confuse the terms “menstrual cycle” and “period.”
When you get a period, you bleed (or menstruate).
A menstrual cycle begins on the first day of a period and concludes the day before the next menstruation. A cycle is considered normal if it lasts between 21 and 35 days. They can differ amongst women and from cycle to cycle.

determining your ‘average' menstrual period length

If your menstrual cycles vary in duration (as they do for most women), you can calculate your average cycle length.
The length of a woman's menstrual cycle might vary from month to month. Periods are not always consistent. To determine when you're most likely to be ovulating, calculate a ‘average' cycle length based on the length of three menstrual cycles.
The average cycle duration is calculated by adding the number of days in three cycles and dividing the total number by three.
Sarah kept track of her previous three menstrual cycles by noting the days between the starting day of one period and the day before the next.
Cycle 1 lasted 28 days, Cycle 2 32 days, and Cycle 3 27 days.
87 is the sum of 28 + 32 + 27.
87 divided by 3 equals 29
So Sarah's menstrual periods are 29 days long on average.

Identifying your most fertile days

You can determine when you ovulate if you know your average menstrual cycle length.
Ovulation occurs around 14 days before your menstruation begins.
If you have a 28-day menstrual cycle, you will ovulation around day 14, and your most fertile days will be days 12, 13, and 14.
If you have a 35-day menstrual cycle, ovulation occurs around day 21, and your most fertile days are days 19, 20, and 21.
When your cycle is shorter, say 21 days, ovulation occurs around day 7, and your most fertile days are days 5, 6, and 7.
The three days preceding and including the day of ovulation are your most fertile.
Some women's cycles are extremely erratic, and determining an average cycle duration might be challenging. This can make determining when ovulation occurs difficult. If it becomes too difficult, having intercourse every 2-3 days covers all bases and increases your chances of becoming pregnant.

What are the chances of that happening?

Having intercourse as near to the moment of ovulation as feasible enhances the chances of pregnancy.
If a woman has intercourse six or more days before ovulating, her chances of becoming pregnant are almost nil.
If she has intercourse five days before ovulating, her chances of becoming pregnant are roughly 10%.
If she has intercourse on the day of ovulation or two days before, she has a 30% chance of being pregnant.
These are average values that vary according on a woman's age.

Know when you ovulate:

Ovulation normally occurs 14 days before the start of your next period, but it can vary from month to month – even in women with regular cycles. Chart your basal body temperature and cervical mucus to obtain a better idea of when you're ovulating. To check for hormonal changes before ovulation, you can also use an over-the-counter ovulation prediction kit or OPK's, an ovulation monitoring bracelet, or lab testing. OPKs can detect the presence or amounts of ovulation-related hormones. An ultrasound can also be used to assist anticipate and determine ovulation.

Have love frequently:

Your chances of getting pregnant improve when you have sex one to two days before you ovulate. However, cycle duration varies, and some women's cycles are irregular or have been misjudged. Sperm may live in the body of a woman for up to 5 days. To hedge your bets, have intercourse regularly beginning three days before ovulation and continue for two to three days after you believe you've ovulated.

After sex, should you lie low?

It has long been assumed that after intercourse, you should stay in bed for at least 15 minutes to allow sperm to reach the egg. Recent investigations, however, have found no evidence to support this assumption.

Maintain a healthy weight:

Studies suggest that weighing too little or too much might interrupt ovulation and interfere with the synthesis of critical hormones. A healthy BMI ranges between 18.5 and 24.9. It's good to stay healthy with modest activity, but now isn't the time to start training for a marathon: Exercising vigorously might disrupt your menstrual cycle, making it more difficult to conceive.


According to research, stress may make it more difficult to conceive. Yoga, meditation, and long walks can all help to reduce stress and enhance general well-being.

Take care of medical issues.

Make sure any medical conditions you have, such as diabetes, asthma, or epilepsy, are under control. Consult your doctor about any prescription or over-the-counter drugs you're taking, since they might influence your ability to conceive.

His health is also important.

While it is typical to conceive of fertility as a woman's duty, more than one-third of all reproductive disorders involve simply the guy, and another third include both partners as a pair. Men, like women, can enhance their reproductive health by stopping smoking, limiting alcohol use, eating healthfully, and reducing stress.

Do you want a boy or a girl?

Several beliefs contend that having intercourse at a given time of the month or in a specific position might impact the gender of your kid. However, there is no definite, natural technique to determine your baby's sex. Unless you utilize a sperm-sorting process followed by artificial insemination, your chances are 50-50.