Ovulation Calculator โ€” Know Your Most Fertile Days

Discover the best days to conceive and your peak fertility window

โœ“ 100% Free โœ“ Visual calendar โœ“ Medically accurate
๐Ÿคฐ Pregnancy ๐Ÿ”ด Period ๐ŸŒธ Ovulation

Calculate your ovulation days

Enter your last period date and cycle length to get your fertility window

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How Does Ovulation Work?

Understanding your fertility cycle helps you plan for pregnancy

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Phase 1

Start of cycle (period)

The cycle begins with menstruation. Hormones stimulate the ovaries to develop a new egg over the next 7โ€“14 days.

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Phase 2

Ovulation โ€” peak fertility

The ovary releases a mature egg that lives only 12โ€“24 hours. This is the best time to conceive โ€” a short but precious window!

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Phase 3

After ovulation

If no fertilisation occurs, hormones drop and a new cycle begins about 14 days later. If fertilised, pregnancy begins!

Natural Signs of Ovulation

Your body gives signals during ovulation โ€” learn to recognise them

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Change in vaginal discharge

Discharge becomes clear and resembles raw egg white โ€” the clearest sign of approaching ovulation.

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Slight rise in body temperature

Basal body temperature rises by 0.2โ€“0.5ยฐC after ovulation and stays elevated until the next period.

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Mild abdominal pain

Some women feel a slight pain or pressure on one side of the abdomen (called Mittelschmerz) during ovulation.

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Increased sex drive

Many women notice a natural increase in libido during ovulation days โ€” your body's natural programming!

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Cervical softening

During ovulation, the cervix becomes softer, higher and more open โ€” this can be felt during self-examination.

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Feeling of energy and vitality

Hormones are at their peak during ovulation days, which can make you feel full of energy and vitality.

Frequently Asked Questions About Ovulation

When does ovulation occur in the menstrual cycle?
In a 28-day cycle, ovulation typically occurs around day 14. For shorter or longer cycles, the ovulation date changes. General formula: ovulation = cycle length minus 14. Example: a 32-day cycle means ovulation on day 18.
How long does the ovulation window last?
The released egg lives only 12โ€“24 hours, but the fertility window spans 5โ€“7 days because sperm can survive 3โ€“5 days in the reproductive tract.
Can you get pregnant after ovulation?
Pregnancy chances drop sharply 24 hours after ovulation. The best window is 1โ€“5 days before ovulation and on ovulation day itself, with peak chances on days -2 and -1.
What if my cycle is irregular?
If your cycle is irregular, it's difficult to calculate ovulation accurately. Recommended options: use LH ovulation test strips (available at pharmacies), track your basal body temperature daily, or consult a doctor if the problem persists.