🤰How far along is this pregnancy?

Give the first day of your last period: we work out the due date, the weeks, the current trimester and what is left to go.

Your starting date

First day of your last period

The classic calculation starts there and adds 280 days. If you know the conception date, add 14 days to it. Your cycle length

28 j

The standard maths assumes 28 days. A longer cycle pushes the due date back by the same amount.

From experience

A due date is not an appointment.

With Benjamin we sailed past the due date with nothing happening, and understood what everyone had told us: fewer than 5 % of babies arrive on the announced day. That date exists to organise care, not to count down.

Our pregnancy in Réunion →

An indicative calculation based on Naegele’s rule. Only the dating scan is authoritative, and your medical team decides.

Other tools

🪙Pocket money guide 📱Screen-time budget 🎨Learning posters 🌀Cyclone kit