Is this due date exact?

No. It is a practical estimate based on dates you enter, and clinical dating may differ.

Why does cycle length matter?

Cycle length changes the likely ovulation date, which can shift the due date estimate slightly.

If your dates are uncertain, the estimate will be less reliable and professional advice becomes more important.

Estimate a pregnancy due date from your last menstrual period and cycle length.

Informational guidance only. This estimate does not replace scan dating or clinical advice.

First day of last period

Average cycle length

days

Get your score

Get your free Protection Score

Check how protected you are, spot the biggest gaps, and then decide what to do next.

Answer a few quick questions

See where your biggest protection gaps may be

Move into the right next step if you want help

What you get

A quick view of your current protection position

A clearer idea of where the biggest gaps may be

A direct route to tailored help if you want it