Fear Free Childbirth
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Free tool · Birth fear & prep

Have confidence in your due date

Your due date is probably wrong — the standard method can be up to two weeks out, which changes everything when you're facing pressure to induce. Use the free calculator below to work yours out four evidence-based ways.

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in partnership with Fear Free Childbirth
Free tool · Due date calculator

Fearing the countdown to your due date?

Here's something most people don't realise: your due date is probably wrong. The standard method doctors use — Naegele's Rule — was inspired by the Bible, not evidence, and it can be up to two weeks out.

That matters enormously when you're being pushed towards induction. This calculator works out your due date four different ways — the standard one, plus three grounded in research — so you can stop fixating on a single date and feel calmer as your baby's arrival approaches.

Unlock the calculator

Pop in your details and it opens straight away.

This tool is from Fearless Birthing, so you'll be added to the Fearless Birthing mailing list and receive occasional emails to support a calmer, more confident birth. Your dates are worked out privately on your own device — we never see or store them. No spam, unsubscribe any time.

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Your due date cheat sheet

Your estimated due dates

Most likely window

Your baby may not be as "late" as you're led to believe. A due date is an estimate, not a deadline.

For information only — not a substitute for medical advice. If your pregnancy involves complications or needs close medical supervision, follow your midwife or doctor. Methods: Naegele's Rule (standard); Park, 1968; Nichols, 1985; Mittendorf et al., 1990. · A free tool from Fearless Birthing · fearless-birthing.com