What day did you last start your period?
  Format = MM/DD/YYYY
     Last Menstrual Period:        


How long is it between your periods?
  If you do not know, just enter the average number, 28.
     Average Length of Cycles:     


How long is the phase between ovulation and your period?
  If you do not know, just enter the average number, 14.
     Average Luteal Phase Length:  


Your Estimated Calculations

Your baby was probably conceived on or around:  

Your due date is most likely on or around:              

Your baby’s gestational age is approximately:    



*This pregnancy calculator is not a medical tool. The calculations are based on a 
formula using your own criteria. Please see a doctor for your official calculations.