Ovulation Calculator

Know your
ovulation cycle

Our ovulation calculator makes it easy to estimate your fertile window using the date of your last period and cycle length. Enter a few details, and you’ll see your predicted ovulation date, fertile days, and next period.

Remember, everybody is unique — if your cycles are irregular or you’d like more clarity, our fertility experts are here with personalised guidance.

Ovulation 101:
Know your body’s rhythm

Ovulation is the moment your ovary releases a mature egg, usually mid-cycle. The egg lives for just 12–24 hours, but since sperm can stay in the body for up to five days, your fertile window stretches across several days — before and during ovulation.

Understanding this rhythm not only helps when you’re trying to conceive, but also gives you a deeper connection to your body. And whenever you feel unsure, our fertility experts are here to guide you with warmth and care.

From planning to pregnancy:
Why timing matters

Trying to conceive or want to know your body better? Tracking your ovulation can offer meaningful insight and a little peace of mind along the way.

Better timing

Understand your fertile days to plan intimacy with confidence.

Early Clues

Informed Care

Body awareness

Know your
fertile window

Your fertile window — the five days before ovulation plus the day itself — is when conception chances are highest. In a typical 28-day cycle, this falls between days 10 and 16.

Our calculator offers an estimate to help you plan confidently. If your cycles are irregular or you’ve been trying without success, our fertility experts are here to provide clarity, reassurance, and guidance every step of the way.

Frequently asked,
thoughtfully answered

Amid questions, hopes, and sometimes doubts — emotions as natural as the desire to create life — it’s normal to seek understanding and reassurance. Our dedicated team is here to provide gentle, thoughtful answers whenever you need them.

Yes, stress or illness can potentially delay ovulation. The hormones that regulate the menstrual cycle are sensitive to physical and emotional stress. Significant stress or illness can disrupt the hormonal balance, potentially delaying ovulation or causing it to be skipped entirely in a given cycle.

It’s not possible to ovulate twice in a cycle with several days or weeks in between. In a typical menstrual cycle, only one egg is released during ovulation. However, it is possible for two eggs to be released in a single cycle, in an event known as superovulation. This usually happens within 24 hours of the first egg being released. This is how fraternal twins are conceived.

Ovulation can occur at any time of day or night. The exact timing can vary from woman to woman and even from cycle to cycle. The commonly cited figure of ovulation occurring around day 14 of the menstrual cycle is an average, not a rule.

An ovulation calculator can help you identify your fertile window, or the days when you are most likely to conceive. This can be useful if you’re trying to get pregnant, or if you’re trying to avoid pregnancy and are using fertility awareness as a method of contraception.

If you have PCOS (Polycystic Ovary Syndrome), an ovulation calculator may be less accurate. This is because women with PCOS often have irregular menstrual cycles and may not ovulate every cycle. If you have PCOS and are trying to conceive, it’s a good idea to speak with a healthcare provider for personalized advice.

You can aim to have intercourse in the days leading up to and including the day of ovulation. Sperm can survive in the female reproductive tract for up to 5 days, so having intercourse before ovulation can ensure that sperm are present when the egg is released. Maintaining a healthy lifestyle, including a balanced diet, regular exercise, and avoiding harmful substances like alcohol and tobacco, can also improve your overall fertility.

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Know your
ovulation cycle

Ovulation 101:
Know your body’s rhythm