15 Pregnancy Due Date Calculators

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When one due date calculator isn’t enough…

pregnancy due date calendar, pregnancy due date calculators, due date, estimated EDD

If you are pregnant and searching for a due date calculator you probably only need to check one or two and get confirmation from your doctor. 


The same was true for me too but I found myself down a rabbit hole of pregnancy due date calculators and decided to do what I like to do – make a list.



I didn’t just visit each of these calculators, nope that would have been normal. I took the time to enter the same information into each calculator and each one listed below provides the same due date.


How is that for consistency?  


Why did I go through this exercise?


In the post ‘Pregnancy Planning 101‘, I write about pregnancy planning, ovulation, and how our due dates are calculated (without a calculator) and my research led me to seek out pregnancy calculators.


You can find the list below.


The calculators are all pretty basic but the first 2 are my faves because they provide the most information. All others are in no specific order. 




  1. Mom Junction Due Date Calculator I like the additional weekly pregnancy information.
  2. Essential Baby Due Date Calculator I like the conception dates and trimester dates are included.
  3. MayoClinic Due Date Calculator
  4. March of Dimes Due Date Calculator
  5. WebMD Due Date Calculator
  6. BabyCenter Due Date Calculator
  7. BabyCentre Due Date Calculator
  8. Mama Natural Due Date Calculator
  9. Your Due Date
  10. Mother and Baby Due Date Calculator
  11. First Response Due Date Calculator
  12. The Bump Due Date Calculator
  13. Pampers Pregnancy Due Date Calculator
  14. What to Expect Due Date Calculator
  15. Pregnancy Birth and Baby Due date Calculator



Although each of the calculators easily spits out a number, be sure to check with your prenatal care team for confirmation. 


Measurements provided using gestational age (GA) can be more informative than measurements using last menstrual period (LMP).


Also, did you know you can estimate your due date without these calculators?


1. Use Nagele’s Rule (It’s the same rule the calculators use): 


Calculation: [ (The first day of  LMP – 3 calendar months) + (1 year &  7 days) ]

*This calculation is based on a 28 menstrual cycle.


If math isn’t your thing, you still don’t need a calculator.


2. Our favorite smart people at John Hopkins put together a chart that can give you the results of the calculators. Find it here.


For more pregnancy content and information, follow along on Pinterest.



Tiffany Green

Hi, I'm Tiffany! I'm a former newborn screening chemist, a trained doula, and a mom with a masters degree in family life and youth development. I write about pregnancy, motherhood, and wellness with the goal of helping pregnant women and new moms crush overwhelm so that managing family life is an adventure - instead of a hassle.