Fertility Calculators

Calculate your estimated conception date, fertile window, and due date based on your last menstrual period. Get a detailed pregnancy timeline with week-by-week milestones and ovulation tracking.

Enter the first day of your last period and cycle length to see fertile days, predicted ovulation, and an estimated due date.

Enter your last period start date, cycle length, and period duration to predict future periods, ovulation dates, and fertile windows for the next 6 cycles.

Enter the start dates of your last two periods to calculate your cycle length in days and estimate your next period, fertile window, and ovulation day.

Enter the first day of your last period, average cycle length, and luteal phase. Get fertile days, a predicted ovulation date, and a due date if you conceive.

Build a monthly calendar from your last period date, cycle length and luteal phase. View estimated fertile days, ovulation and cycle phases.

Enter the first day of your last period, average cycle length, and luteal phase. Get an ovulation date, fertile days, cycle phases, and a six-cycle forecast.