An ovulation prediction calculator and kit can be purchased at any store, large retail shops or drug stores. They are great for women who want to have something more than a typical calculator, like the online ovulation calculator, since these kits include an ovulation test as well; it is a simple urine test that can show you if you are ovulating or not.

These kits are pretty useful and accurate, but the problem is that they are rather costly, especially if you intend to use them frequently. They cost approximately 30-40$, so it might not be a great idea for a monthly check.

Another ovulation calculator and predictor is the saliva microscope, which is a small tube with a light and a lens. You place a small amount of saliva on the lens and they can show you if you are ovulating or not. The method followed here is the observation of the estrogens that are usually increased just before and during the ovulation. The main drawback of this method is that unless you are familiar with what you see, you won’t be able to use them effectively.

Of course there are less technical and complex methods to predict your ovulation. One of them is using an ovulation calculator and chart. Charting requires some amount of work on your behalf, since you need to write down and record dates and figures every month, for several months at least. The point is to record the processes and ovulation symptoms or dates, so as to understand the functions of your body. Most women are not in that close touch with their body, that is why sometimes fail to understand what is going on inside them.

Once you get the hang of the ovulation calendar, you can combine the results with a calculator which you can find online for free. The results of combined methods are the most reliable, usually, for all women.