Ovulation and Conception Calculator

Our brilliant ovulation calculator estimates your ovulation dates over the next six months. And it highlights your most fertile days, helping you plan your pregnancy.

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!

Check your ovulation dates, and most fertile days, over the next six months.

Women's menstrual cycles can vary in length considerably. In fact, very few women have a 28-day cycle. Please select the average length of your cycle in the box below. And remember: our calculator is more accurate at predicting your most fertile days in your current cycle than in your future cycles.

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.

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