Pregnancy & Women’s Health calculators
Due dates, ovulation and healthy gestation.
Pregnancy Due Date Calculator
Estimated due date from your last period.
Conception Date Calculator
Work backwards from a due date to when you conceived.
Ovulation & Fertile Window Calculator
Predict ovulation day and your most fertile days.
Gestational Age Calculator
Weeks and days pregnant on any date.
Pregnancy Weight Gain Calculator
Recommended weight gain by week using IOM guidance.
Pregnancy Calorie Calculator
Extra daily calories needed by trimester.
Menstrual Cycle Length Calculator
Average cycle length, regularity and next period.
IVF Due Date Calculator
Due date from your embryo transfer date.
Breastfeeding Calorie Calculator
Calories and fluids needed while nursing.
Osteoporosis Self-Assessment (OST)
Simple bone density screening score for women.
Pregnancy Trimester Calculator
Find your current trimester and weeks pregnant from your last period date.
Estimated Fetal Weight (Hadlock) Calculator
Estimate baby’s weight from ultrasound measurements (Hadlock 3 formula).
Baby Kick Count Calculator
Work out your kicks per hour and whether it meets the 10-kicks-in-2-hours guideline.
Next Period Predictor
Predict your next period start date from your last period and cycle length.
Cycle Day Calculator
Find which day of your cycle today is, counting the first day of bleeding as day 1.
Days Until Due Date Calculator
Count the days left until your estimated due date from your last period.
Daily Folate Needs Calculator
Recommended daily folate (folic acid) for pregnancy, breastfeeding or not pregnant.
Cervical Screening Interval Calculator
Typical cervical screening interval by age (US guidance).
Mammogram Screening Schedule Calculator
Typical breast screening frequency by age.
Average Cycle Length Calculator
Average your last few cycle lengths to predict the next one.
Pregnancy Test Timing Calculator
Find the earliest day a pregnancy test is likely to be reliable.
Gestational Diabetes Screening Date Calculator
Find when the usual 24–28 week glucose test falls.
Prenatal Visit Schedule Calculator
Typical prenatal visit frequency for your current week.
Breast Milk Storage Time Calculator
How long expressed breast milk stays safe in different conditions.
Pregnancy and Breastfeeding Water Target
Total daily water intake recommended in pregnancy and while breastfeeding.
Related guides
How Pregnancy Due Dates Are Calculated
Naegele’s rule, ultrasound dating and why only 4 percent of babies arrive on the day.
Pregnancy & FamilyOvulation and the Fertile Window
Timing intercourse in the six days before and on ovulation boosts chances.
Pregnancy & FamilyHealthy Weight Gain During Pregnancy
How much to gain depends on your pre-pregnancy BMI.