What the site offers
Each calculator applies a published pregnancy-dating convention to one date you enter and labels the result as an estimate. The Blog explains the conventions behind the numbers and their limits.
What the site is not
This site provides general information. It is not a medical service and does not replace care from a midwife, doctor or other qualified healthcare professional. It can’t take your own medical history into account, and it can’t tell you your exact due date or exact conception date. See the medical disclaimer.
How the content is written
Medical statements on this site are based on published clinical guidance and peer-reviewed research, and each one is linked to a numbered source on the page. The site does not claim a medical reviewer, and no content has been reviewed by a named clinician. The editorial policy explains how sources are chosen and how corrections are handled.
Privacy by design
The calculators run in your browser. Dates you enter are not sent to this website and are not stored. The site currently uses no analytics, no advertising and no third-party scripts or fonts. Read the privacy page for details, including what the web host may log.
Contact
Questions, feedback or a correction to suggest? Please use the contact page.