Disclaimer

The calculators and content on this site provide general estimates based on standard clinical conventions (such as Naegele's rule) and are not medical advice, diagnosis or treatment. Every pregnancy and cycle is different — dates shown are estimates, not guarantees. Always confirm dates and any health decisions with your doctor, midwife or other qualified healthcare provider.

Accuracy of results

We test every calculator against reference values and review our formulas regularly. However, results depend entirely on the numbers and assumptions you enter, and simplified models cannot capture every real-world factor. Use the results as a starting point, not a final answer.

External links & advertising

The Site may contain advertising and links to third-party websites. We do not endorse and are not responsible for third-party content, products or services.

Questions

If anything is unclear, contact us — we're happy to explain how any calculator works.