Ovulation Calculator | Fertility CalculatorAre you trying to conceive? Find out when you’re most fertile and when is the best time to get pregnant with our Ovulation Calculator.

Ovulation Calculator

What was the first day of your last period ?

When is the most fertile period for conceiving?
The best time to try and conceive is during the ‘fertile window’ of the menstrual cycle. The Fertile Window are the days in a woman’s menstrual cycle when pregnancy is possible. These six days of the ‘fertile window’ in a woman’s menstrual cycle reflect the lifespan of sperm (5 days) and the lifespan of the ovum (24 hours).

  • If a woman has sex six or more days before she ovulates, the chance that she will get pregnant is virtually zero. If she has sex five days before she ovulates, the probability of pregnancy is about 10%.
  • The probability of pregnancy increases steadily until the two days before and including the day of ovulation.
  • At the end of the ‘fertile window’, the probability of pregnancy declines rapidly and by 12-24 hours after a woman ovulates, she is no longer able to get pregnant during that cycle.
  • For those women who are not aware of their ‘fertile window’ or when they ovulate, sexual intercourse is recommended every 2 to 3 days to help optimize their chance of getting pregnant.Fertile Window for Conceiving

Improve your chances of conceiving!
Now that you know when you’re most fertile days, make use of the ovulation calculator results and figure out what you need to do to boost your chances of conceiving! The likelihood of actually becoming pregnant is dramatically increased if you have intercourse in the three days leading up to and including ovulation. If a woman has sex on any of these three days, she has a 27-33% chance of becoming pregnant.

How does the Ovulation calculator work?
Put in the first day of your last period. Also tell us the average length of your menstrual cycle. Using these two inputs, we can calculate the window of time when you’re most fertile. While the average menstrual cycle lasts 28 days, anything from 20 to 45 days is normal.

Take a look at the Ovulation Chart below to understand your Ovulation cycle better.

Ovulation Chart

Does the Ovulation calculator produce accurate results?
For most women, it does. It is important to note that this calculator provides approximate dates and assumes a regular menstrual cycle. If your menstrual cycles are irregular, you may have difficulty in pinpointing your day of ovulation based on this tool alone.

Pregnancy Calculators

BMI Calculator for Pregnancy

The BMI Calculator (Body Mass Index Calculator) is a useful tool of establishing whether your weight is within a healthy range.

Due Date Calculator for Pregnancy

Are you counting weeks, months and trimesters? Use our Due Date Calculator to find out your due date or your baby’s expected birthday!

Pregnancy Weight Gain Calculator

The Pregnancy Weight Gain Calculator will recommend the ideal weight range for your pregnancy based on your pre-pregnancy height and weight.

Weeks Into Months Pregnancy Calculator

Find out how many months into your pregnancy you are with the Weeks into Months Pregnancy Calculator which converts your weeks of pregnancy into Months.

Ovulation Calculator was last modified: January 29th, 2017 by Anjali Sharma