Ovulation Calculator

Menstrual periods are different from woman to woman and month to month. Use this calculator to see when you may be ovulating to help find your most fertile days.

  • Last Period Date
  • Monthly Cycle
  • Result

Select the first day of your last period

First day of the week

NOTE: This tool cannot and should not be used to prevent pregnancy. Results are estimates and actual ovulation will vary for each woman.

How long is your average cycle?

  • 22
    DAYS

  • 23
    DAYS

  • 24
    DAYS

  • 25
    DAYS

  • 26
    DAYS

  • 27
    DAYS

  • 28
    DAYS

  • 29
    DAYS

  • 30
    DAYS

  • 31
    DAYS

  • 32
    DAYS

  • 33
    DAYS

  • 34
    DAYS

  • 35
    DAYS

  • 36
    DAYS

  • 37
    DAYS

  • 38
    DAYS

  • 39
    DAYS

  • 40
    DAYS

NOTE: This tool cannot and should not be used to prevent pregnancy. Results are estimates and actual ovulation will vary for each woman.

Your Cycle Is 31 Days

Fertile Window

Fertile Window

FEB

22

Approximate
OVULATION

Approximate OVULATION

FEB

22

Next Period

Next Period

FEB

22

Pregnancy
Test Day

Pregnancy Test Day

FEB

22

Start Over

NOTE: This tool cannot and should not be used to prevent pregnancy. Results are estimates and actual ovulation will vary for each woman.

What are the signs of ovulation?
  • Higher levels of luteinizing hormone (LH), measured on a home ovulation kit
  • Change in the colour of cervical mucus, or vaginal discharge
  • Rise in basal body temperature, typically 1/2 to 1 degree
  • Bloating
  • Light spotting
  • Slight pain or cramping in your side
  • Breast tenderness
What is an ovulation calculator?
The ovulation calculator is the approximate calculation of your most fertile days. Based on last month period (LMP) and the length of your menstruation cycle, the ovulation calculator will predict the days when your chances of getting pregnant are high. The ovulation calculator does not provide and guarantee a pregnancy or birth control, but only gives an estimate of your fertile window based on your inputs. The menstrual cycle of each woman is different, so getting to know your fertility window can increase your chances of conception. But for a better and safe outcome, you should talk to your doctor and discuss your pregnancy plans.
What is fertility window?

Every woman has a fertility window. It includes the days in a woman's menstrual cycle when she can successfully become pregnant. The fertility window of a woman depends on the length of her menstrual cycle. The fertile window begins the day the ovaries release an egg and the five days ahead. Having sex during the fertility window increases the possibilities of a woman getting pregnant.

How do you know you are ovulating?

Common signs that you are ovulating include:

  • Rise in the body temperature by 1-2 degrees
  • Higher level of luteinizing hormone that can evaluated by using an ovulation kit at home
  • Breast tenderness
  • Bloating
  • Vaginal discharge and cervical mucus may appear thinner
  • Light spotting
  • Abdominal cramping
How to calculate the most fertile days?

If you know your LMP and the length of your menstrual cycle, you can easily find out when you are likely to ovulate.

Ovulation happens about 4 days before the next period starts.

If your menstrual cycle is of 28 days, you will ovulate around the 14th day of the first day of your LMP. Day 12, 13, and 14 will be your most fertile days.

If your menstrual cycle is of 21 days, you will ovulate around the 7th day of the first day of your LMP. Day 5,6, and 7 will be your most fertile days.

If your menstrual cycle is of 35 days, you will ovulate around the 21st day of the first day of your LMP. Day 19, 20, and 21 will be your most fertile days.

Your most fertile days are the three days leading up to and including the day of ovulation.

What are the best tips for pregnancy?

1. Know when you ovulate -
Ovulation can vary from month to month in the same woman, but usually happens 14 days before your next period. To keep a track of your ovulation days, you may use an at-home ovulation kit and check if there are any hormonal changes in your urine before your ovulation.

2. Have sex often during your fertile window -
Your chances of getting pregnant are the highest 1-2 days before your ovulation. But since the cycle and fertility window may vary month to month, the best thing to do is have frequent unprotected sex from at least 3 days before your ovulation day.

3. Keep a check on your weight -
If you are planning to get pregnant, prepare your body for the pregnancy. Being underweight or obese may affect your chances of getting pregnant. Do not indulge in strenuous physical activities but practice moderate exercises and try to stay fit.

4. Take prenatal vitamins -
Start taking prenatal vitamins before you plan your pregnancy. The baby's neural cord requires essential nutrients like folic acid, calcium, and iron from the very beginning of the pregnancy.

5. Educate yourself about pregnancy -
Whether or not this is your first baby, attending a childbirth class can help you be more prepared for the delivery. You will not only learn more about childcare, but you will get a chance to connect with other women who are going through the same phase.

6. Keep stress away -
Time and again, researchers have shown that stress makes pregnancy tough. Meditation, a relaxed walk in the harmony of nature, and yoga can help lower stress and promote a healthy pregnancy.

7. Check your medications-
Consult with your ob-gyne before taking any over-the-counter medications or supplements. Even non-steroidal drugs should be taken with recommendation since they can prove fatal for the blood vessels.

8. Eliminate toxins-
Alcohol, tobacco, and other toxins have a link with miscarriage, birth defects, and other severe pregnancy complications. Smoking, even if it is passive, can decrease the supply of oxygen to the baby.

9. Have sex often-
The chances of conceiving increases if you indulge in frequent sex at least 1-2 days around your ovulation date. Sperm can survive in a woman's body for up to 5 days. So, indulging in more sex can increase the chances of your pregnancy.

What to eat? What not to eat?

Eat these:

  • Dairy products
  • Legumes
  • Salmon
  • Eggs
  • Green leafy vegetables
  • Berries
  • Lean meat
  • Sweet potatoes
  • Whole grain
  • Dry fruits
  • Avocadoes

Do not eat these:

  • High mercury fish
  • Undercooked meat
  • Organ meat
  • Caffeine
  • Raw sprouts
  • Unpasteurized milk and cheese
  • Alcohol
  • Junk foods