A gentle start to smarter planning
Enter the start date of your last period and your average cycle length, and our calculator will do the rest.
Get your estimated next period date
Know your probable ovulation day
Learn about your most fertile days (ideal for timed intercourse)
Everybody is different and so is every cycle. While this calculator is a great guide, nothing replaces expert insight. Meet our fertility specialists for a personalised ovulation tracking consultation.
Periods Calculator
Whether you're planning a pregnancy, exploring treatment options, or simply staying connected to your body, our Period Calculator offers a reliable way to track your cycle. This tool estimates when your next period is due, highlights your likely ovulation days, and identifies your most fertile window.
Know when you can conceive
Understand patterns in your cycle
Spot potential irregularities
What these dates
mean for you
Your results give you a general idea of when you're most likely to ovulate, and when your chances of conceiving are highest.
Ovulation Day
The day your body is most likely to release an egg
Fertile Window
The day your body is most likely to release an egg
Next Period
The day your body is most likely to release an egg
If you have felt uncertain for a while or your cycles are irregular, this tool can guide you, but it’s only part of the picture. Our fertility experts are here to listen, understand, and help you plan the way forward.
Signs your period is coming
Breast tenderness
Hormonal spikes in the menstrual cycle lead to breast discomfort.
Mood swings
Premenstrual syndrome (PMS) causes emotional and physical changes like irritability, food cravings, and, in severe cases, depression and anxiety.
Bloating
Lowered progesterone levels cause water retention, resulting in bloating before menstruation.
Acne
Hormonal fluctuations may trigger acne, often seen as red bumps on the lower face, resolving after menstruation.
Cramps
Dysmenorrhea, or cramps, occurs before and during menstruation as the uterus sheds its lining.
Vaginal Discharge
Increased progesterone levels causes cloudy or white vaginal discharge before menstruation.
Signs of period coming late
Pregnancy
Home pregnancy tests can confirm if you’re pregnant.
Stress
Chronic stress disrupts hormone balance; relaxation techniques help.
Weight Changes
Sudden weight fluctuations can delay periods; consult a doctor or nutritionist if needed.
Medical Conditions & Medication
Hormonal fluctuations may trigger acne, often seen as red bumps on the lower face, resolving after menstruation.
Menopause
Menopause typically occurs between 45-55; early menopause (POI) can begin as early as 40.
Perimenopause
Delayed periods before menopause, called perimenopause, usually starts in women in their 40s.
You’re not alone, we’ve
got you covered
The menstrual cycle starts on the first day your period until the next first day of your period. On average, the cycle lasts anywhere between 21 to 35 days. You can calculate your period by first determining the average length of your cycle. Keep a count of the number of days between your period for the last few cycles. Then add up the total number of days and divide it by the number of cycles. This gives you the average number of days in your period.
Tender breasts, feeling bloated, period acne, menstrual cramps, mood swings, and dry discharge are some signs that your period is coming.
A period is said to be late when it doesn’t start on the expected date of your next cycle. Clear milky white and excessive discharge, lower abdomen pain, fatigue, nausea, tender breasts, etc. are some signs of a late period.
Detecting patterns in your cycles is the first step to determining whether you have irregular periods. You can also track your ovulation time to determine the next period date. Cervical mucus secretion and basal body temperature both tend to slightly increase before and during ovulation. You can notice these changes or use ovulation predictor kits to know when you’re ovulating and determine an approximate date of you your next period.
Your next period date is based on your average cycle length and the regularity of your periods. Since the cycle length varies between 21 to 35 days, period dates may change every month.
"If there are no underlying conditions, your period must start within 21 to 35 days, depending on your cycle. A delay of up to 7 days is considered normal and more than 6 weeks is considered to be a missed period.
If your cycle is almost always on time but you’ve been noticing unusual delays, it is best to seek advice and eliminate any underlying health issues."
Foods rich in antioxidants, iron, calcium and vitamins are known to regulate periods. Some of these include papaya, aloe vera, pineapple, carom and fennel seeds, whole grains, berries, flaxseeds, leafy vegetables, fatty fish, avocado, dark chocolate, etc.
Some foods that can naturally delay your periods include apple cider vinegar, lemon juice, gelatin, gram lentil soup, cinnamon, watermelon, chia seeds, cucumber, raspberry leaves, etc.
"Pregnancy is the most plausible reason for a delayed or missed period. However, other reasons apart from pregnancy include being on birth control medication, health conditions like PCOS, stress, changes in your body weight, diabetes or thyroid issues, and perimenopause.
If you think your period is regularly delayed, consult your doctor to determine the cause and address issues, if any. "
If you’re new to a period calculator, it will take a few cycles for the calculator to understand your pattern. The period calculator uses information such as your last period date, the length of your period, and the number of days between each cycle to determine your next period date.
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