Pregnancy Due Date Calculator

1. First Day of Last Menstrual Period: (Required)
   (First day of bleeding.)
   
2. Average Length of Cycles: (Optional)
   (From first day of your period to the first day of your next period.)
   (Ranges from: 22 to 44. Default = 28.)
   (Leave 28 if unsure.)

Calculate!

Results

1. Estimated Fertility Window:From To
2. Estimated Conception Date:
3. Estimated Gestational Age (how far along your pregnancy is):
4. Estimated Due Date (only 5% born on their due date!):