Pregnancy & Due Date
Track a pregnancy with transparent, clinically-conventional date math — estimated due date by last period, conception, IVF transfer, or ultrasound; gestational age in weeks and days; trimester boundaries; and a conception-focused fertile window. Each figure comes from a named obstetric convention (Naegele's rule, ACOG dating) with the assumptions stated plainly. These are estimates, not medical advice — confirm dates with your healthcare provider.
- Pregnancy & Due DateLiveDue Date CalculatorEstimate your due date from your last period, conception date, IVF transfer, or an ultrasound. One calculator, four dating methods — and a note on why due dates are estimates.
- Pregnancy & Due DateLiveGestational Age CalculatorFind your gestational age in weeks and days from your last period. Shows the exact weeks-and-days figure and trimester used in prenatal care.
- Pregnancy & Due DateLivePregnancy Week-by-Week CalculatorSee which week of pregnancy you are in and which trimester, week by week. Enter your last period date to find your current pregnancy week.
- Pregnancy & Due DateLiveConception Date CalculatorEstimate when you conceived from your last period and cycle length. Works backward using the fixed two-week luteal phase to date conception.
- Pregnancy & Due DateLiveOvulation & Fertile Window CalculatorEstimate your ovulation day and fertile window to plan for conception. Enter your last period and cycle length to find your most fertile days.
- Pregnancy & Due DateLivePregnancy Weight Gain CalculatorFind the recommended total pregnancy weight gain for your pre-pregnancy BMI, based on the IOM 2009 guidelines for a singleton pregnancy.
- Pregnancy & Due DateLivePeriod PredictorPredict your next period from your last period and cycle length. Shows your next period date plus the following few cycles.
- Pregnancy & Due DateLiveDue Date CountdownCount down the days until your due date. Enter your estimated due date to see how many days are left until your baby is due.