ovulation calculator

Find your fertile days precisely and easily.

If you want to get pregnant, it is important to know exactly when you are fertile and when you ovulate. Our ovulation calculator helps you quickly and easily calculate when you are ovulating and the most fertile days in your cycle.

fertile days
fertile days

Sperm can survive in your body for several days, so it is not necessary to time intercourse precisely to ovulation.

Very fertile days
Very fertile days

Physical changes may occur, such as increased discharge, mild abdominal pain or increased sexual desire.

ovulation
ovulation

About 14 days before your next period, an egg is released from the ovaries and travels down the fallopian tube. This is the phase when you are most likely to become pregnant. More

implantation
implantation

The fertilized egg moves from the fallopian tube into the uterus, where it implants itself in the mucous membrane.

pregnancy test
pregnancy test

This is the ideal time to take a pregnancy test.

menstruation
menstruation

The onset of your period signals the start of your new cycle. At this time, it is unlikely that you will become pregnant.

Calculate ovulation

Simply enter the first day of your last period and the length of your cycle and click "Calculate".

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notes

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  • Getting Pregnant: Why it's Important to Know Your Fertile Days

    Since fertilization is only possible on a few days a month, it is a good idea to monitor your cycle regularly. The ovulation calculator helps you to determine the best days to get pregnant. Especially if it hasn't worked so far, this tool can help you to determine the time of your ovulation more precisely and increase your chances.

  • Ovulation calculator: Helpful tool for family planning, but not a contraceptive

    Please note: The ovulation calculator is used to calculate fertile days and is not a reliable contraceptive. Use it to support your family planning and to better understand your body.

Do you have any further questions? We are here for you.

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At what point does the fertile phase begin?

At what point does the fertile phase begin?

A woman's fertile days begin about five days before ovulation and end one day after. During this phase, the chances of becoming pregnant are highest, especially on the days just before ovulation. This is due to the different lifespans of sperm and egg. The egg only has a lifespan of 12 to 24 hours, while sperm can survive in the female body for up to five days. This results in around six fertile days per cycle. An ovulation calculator makes it easier to determine this phase, as fertilization does not have to take place only on the day of intercourse.

How accurately can the ovulation calculator determine the fertile days?

How accurately can the ovulation calculator determine the fertile days?

The more regular your cycle is, the more precisely you can calculate ovulation using an ovulation calculator. However, factors such as hormonal fluctuations, stress, certain medications or even climate changes can affect the length of your cycle, making it difficult to determine the exact fertile days. If your cycle is irregular, you should consider the calculated ovulation date as a guide to narrow down the fertile days and better estimate your chances of becoming pregnant.

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How is the date of ovulation calculated?

How is the date of ovulation calculated?

With a 28-day cycle, ovulation typically occurs on day 14, i.e. in the middle of the cycle. However, the actual time of ovulation depends on the individual cycle length, which can vary from woman to woman. If the cycle deviates from the usual 28 days, the time of ovulation also shifts. With a 30-day cycle, for example, ovulation is more likely to occur around day 16 or 17. If the cycle is shorter, ovulation can occur before day 14. An ovulation calculator can help you better estimate your fertile days in order to maximize your chances of becoming pregnant.

When should a pregnancy test be done?

When should a pregnancy test be done?

A pregnancy test can be carried out from the ninth day after ovulation at the earliest if you use a commercially available test from a drugstore or pharmacy. Using an ovulation calculator, you can better determine your fertile days and ovulation in order to determine the ideal time for the test if you suspect you are pregnant.

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