Due date calculation several methods

Bridget • 37 pregnant for the first time. Australian/british living in Spain. Aiming for a healthy natural pregnancy.
Hello everyone, i thought this might be of interest, especially for those going through when - to-induce battles. http://www.fearfreechildbirth.com/blog/due-date-calculation/
According to the various methods my due date is between 12 th feb and 22nd of feb 2017. That gives me a 10 day window when little one might be born - which i think is great! No one is going to tell me im overdue before the 22nd!