Pregnancy Calculator

  • Mean Sac Diameter Calculator
    Calculate Mean Sac Diameter (MSD) from gestational sac length, width and height, and estimate early gestational age in days and weeks.
  • Luteal Phase Length Calculator
    Calculate your luteal phase length in days from your ovulation date and next period start date, and see whether it falls in the normal range.
  • IVF Due Date Calculator
    Calculate your IVF pregnancy due date from the embryo transfer date and embryo age (Day-3, Day-5, or Day-6). Estimates a 40-week gestation due date.
  • Implantation Date Calculator
    Estimate your most likely implantation date from your ovulation date. Implantation typically occurs 6–12 days after ovulation, peaking around day 9.
  • Fundal Height Calculator
    Estimate expected fundal height in cm from gestational age. Get the normal range (weeks ± 2 cm) to compare with a clinical measurement.
  • Fertility by Age Calculator
    Estimate your monthly and yearly chance of conceiving naturally based on age, using typical fertility rates for women under 30 up to over 40.
  • Crown-Rump Length (CRL) Gestational Age Calculator
    Estimate gestational age from crown-rump length (CRL) in mm using the Robinson-Fleming formula. Get age in weeks and days from a first-trimester scan.
  • Clomid Ovulation Calculator
    Estimate ovulation date and fertile window after Clomid (clomiphene). Enter your last pill date to project ovulation ~5–10 days later, plus or minus 3 days.
  • How Far Along Am I? Weeks Pregnant from Due Date
    Find out how many weeks and days pregnant you are from your due date. Enter your due date and today's date to get your gestational age instantly.
  • Weeks Pregnant to Due Date Calculator
    Convert your current weeks pregnant into an estimated due date. Enter weeks and days to see how much time is left of a 40-week pregnancy.
  • Adjusted (Corrected) Age Calculator
    Calculate a premature baby's corrected (adjusted) age from chronological age and gestational age at birth. Free, instant, in weeks and months.
  • Cow Gestation Calculator
    Calculate a cow's calving due date from the breeding date. Uses the standard 283-day bovine gestation period (adjustable for breed differences).
  • Cat Pregnancy Calculator
    Estimate your cat's kitten due date from the mating date. Feline gestation averages 65 days — get the expected delivery date and birthing window.
  • Goat Gestation Calculator
    Calculate your goat's due (kidding) date from the breeding date. Adds a 150-day average gestation and shows days pregnant and days remaining.
  • Guinea Pig Pregnancy Calculator
    Estimate your guinea pig's due date from the mating date. Uses the average 68-day gestation period plus a likely birth window for sows.
  • Pregnancy Conception Date Calculator
    Estimate your conception date from your last menstrual period (LMP) or your due date. Quick, free conception and due-date estimator.
  • Pregnancy Weight Gain Calculator
    Find your recommended pregnancy weight gain by week based on pre-pregnancy BMI, using IOM 2009 guidelines. Get total range and weekly target.
  • Menstrual Period Calculator
    Predict your next period start, ovulation day and fertile window from your last period date and average cycle length. Fast and free.
  • Conception Date Calculator
    Estimate your conception date from your last menstrual period or due date. Uses the standard LMP + 14 days and 280-day gestation rule.
  • Llama Gestation Calculator
    Estimate a llama's cria due date from the breeding date. Uses an average 350-day gestation with an adjustable length and a likely birth window.
  • Rabbit Gestation Calculator
    Estimate your rabbit's kindling (due) date from the breeding date. Rabbit gestation averages 31 days—get a due date and nest box reminder.
  • Sheep Gestation Calculator
    Calculate a ewe's lambing due date from the breeding date. Uses the average 147-day sheep gestation period plus an expected lambing window.
  • Swine Gestation Calculator
    Calculate a sow's farrowing due date from the breeding date using the standard 114-day swine gestation period (3 months, 3 weeks, 3 days).

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