When do you ovulate? Chances are, you don’t know – and that’s a barrier to getting pregnant naturally. So try our ovulation calculator and conception calendar. It pinpoints your ovulation date each month, giving you the best dates to try for a baby. Simply enter the date of your last period and the length of your menstrual cycle. Knowing your fertility window each month is the key to conception – and our fantastic ovulation calculator will help. Good luck!
Disclaimer: Dates given are approximate. They assume a regular menstrual cycle and that you have provided correct information. If your menstrual cycle is irregular, it is harder for this tool to suggest ovulation dates. You must not rely on this calculator as a substitute for medical diagnosis or advice from a healthcare professional.
I’ve been using ovulation test kits each month, but this ovulation calculator is better. I can put in my bleed start date and cycle length, and it maps out my fertile days for that month and future months. This helps me plan the best days to have intercourse, rather than waiting for a last-minute check via the kit. Me and my partner lead very busy lives, so advance planning is needed! The ovulation calculator helps with this. For next month, I can see at-a-glance that we are going to be on holiday during my fertile window. Perfect – guess what holiday activities we will be doing!
I have irregular periods and thought the ovulation calculator wouldn’t work. I was wrong. I entered an average cycle length based on the last three months, entered the start date of my last period, and got a six-month prediction of my future fertility. I went by the summary closely, and guess what? I fell pregnant on the second month, having checked the relevant dates and got me and my partner in the mood when it was needed! Although this meant things were less spontaneous, it did mean we conceived and got pregnant. Thank you for creating the ovulation calculator. It gave us something to focus on (my key dates) and our baby is due in less than six months!
It’s such a simple tool, and I use it a lot. Knowing when my ovulation will happen each month saves me a fortune on testing kits, and I don’t need a fancy app. It’s also good to see when my bleeds, not just ovulation, will take place in the future. I just return to the calculator, and it reminds me of all dates. Seeing future months is good, but I also head to the calculator at the start of my bleed each month to get a snapshot for that month in question. Easy to use, accurate and nicely laid out. It’s the only ovulation calculator I need online, so I recommend it.
An ovulation calculator estimates when you’re most fertile in your menstrual cycle. It usually asks for the first day of your last menstrual period and your average cycle length. It predicts when ovulation is most likely to happen that month, and possibly in the months ahead. An ovulation calculator is most accurate if your periods are regular.
You’re usually most fertile in the days leading up to ovulation and on the day of ovulation itself. This is often called the fertile window. In many women, ovulation happens about 14 days before the next menstrual cycle, but timing varies from person to person and cycle to cycle.
Yes. A pregnancy can happen following unprotected sexual intercourse in the few days before ovulation, not just on ovulation day itself. This is because sperm can survive in the female reproductive tract for several days. An egg, however, lives for a much shorter time after its release. Knowing a woman’s fertile window, as well as the likely ovulation date, can help with conception planning.
An ovulation calculator is a helpful tool. However, not all ovulation calculators are accurate. The good ones work best for women with regular menstrual cycles, because ovulation is easier to predict when cycle length is consistent. If your cycles vary, your fertile window may shift from month to month. Don’t completely trust an online result or prediction. Only your doctor can provide advice tailored to you.
If your periods are irregular, an ovulation calculator can still provide a rough estimate, but it may be less accurate. Ovulation may not happen on the same day each month, or at all, and some cycles may be longer or shorter than expected. Tracking symptoms, or using ovulation tests, may give you extra insight.
Use your average cycle length based on the last several months. For example, if your cycle is usually between 26 and 29 days, work out the average and use that as your best estimate. The more consistent your cycle, the more reliable your predicted fertile days and ovulation dates will be. Uniquely, our calculator gives you ovulation estimates for the next six months.
The best time to have sex when trying to conceive is during your fertile window, especially in the days before ovulation and on the day itself. Many couples trying to conceive aim to have sex every day or two during this timeframe. If that feels too pressurised, having sex twice a week leads to a pregnancy within a year for the majority of couples.
No calculator can tell you the exact moment you ovulate. It can only estimate the most likely ovulation day based on the information you enter. Stress, illness, travel, hormonal changes, natural-cycle variation, and your own fertility status, can all affect ovulation timing and your fertility window.
An estimate of your fertile days across several cycles helps you plan ahead and feel more in control when trying to conceive. It can be especially useful if you want to time intercourse, work around travel or treatment plans, or simply understand your cycle better over the coming months. Ovulation tests can fine-tune estimates, so consider using an online calculator alongside a physical kit.
No. We created our ovulation calculator for all women trying to conceive. Some may go on to have fertility treatment, but the tool works for every woman trying naturally. Our other calculators, like the AMH levels calculator, implantation calculator and BMI calculator, can also help women who are considering fertility treatment in the future.
Generally, it’s sensible to seek advice if you suspect fertility problems after you’ve tried to conceive for 12 months without success. Earlier advice may be helpful if periods are irregular, painful, or you already have a known fertility issue. Every patent is different, so consider starting the conception conversation with your doctor sooner rather than later. A healthcare professional is always the best option to assess your conception chances and the path ahead.
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