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Ovulation Calculator

Since many women's ovulation cycles are very consistent from month to month and because the specific phases of the fertility cycle are well-known, a mathematical calculation can be set up to determine the date of the next predicted ovulation. This calculation can be extended out for several months and will be accurate for women who have a very consistent ovulation cycle. Then, just for fun, if we can predict the date of ovulation, we can also predict the date when fertilization would likely occur, within a range of a few days. And this allows us to predict when a baby would be due when carried to full term!

If your ovulation cycle is very consistent, you'll definitely want to try our free online calculator provided below. As with the BBT ovulation calendar, this method tells you only when ovulation should occur if all is normal within your cycle. An ovulation calculator will not tell you if you've actually ovulated or if your ovulation occurred at the expected time during your ovulation cycle.