Free, private and based on medical guidelines

Know your baby’s due date, gently.

Simple, accurate pregnancy and baby calculators, with a clear timeline for every step that follows.

Based on ACOG, WHO and NHS guidance. Sources on every page.

Due Date Calculator

Have an IVF or ultrasound date? Use more options

Your pregnancy, week by week

Baby size, symptoms and a simple checklist for every week from 1 to 40.

Latest articles

Your baby this week

Sign up for a short weekly email about your baby’s growth, what is changing in your body and what to do next. Free, and you can unsubscribe at any time.

Numbers you can rely on

Every calculator uses published medical formulas, and every page lists its sources so you can check them yourself.

Sources you can check

Every calculator and article links to the guidance it is based on, and is re-checked when that guidance changes.

Based on medical guidance

Formulas follow ACOG, WHO and NHS guidance, and each page lists its sources.

Private by design

Your dates stay in your browser. Nothing you enter is sent to us or stored.