About Date Estimator
Date Estimator is an independent collection of date calculators built on three commitments: accuracy, privacy and speed.
Our story
Date Estimator was created because every existing online "due date calculator" or "age calculator" we used was buried under pop-ups, tracking scripts and unrelated content. We wanted a single place where anyone could pick a clean, fast tool, get an answer in seconds, and leave with their data intact.
What we believe
Accuracy
Every calculator on this site uses publicly accepted formulas (Naegele's rule for pregnancy, ISO 8601 for working days, calendar arithmetic for age and date differences). The math is documented on each tool's page so you can check it yourself.
Privacy
We don't track the dates you enter. Calculations run in your browser. Even our Date Memory Vault stores entries only in your local browser storage. We don't sell, share or analyse personal data.
Speed
Pages are pre-rendered as static HTML and delivered through a global edge network so they load fast on any device, on any connection, anywhere in the world. Every page targets a perfect Core Web Vitals score.
Editorial standards
Health-related content (pregnancy, fertility) is checked against widely cited medical resources and is intended for general information only. We are not a substitute for professional medical advice. If a fact is uncertain we say so explicitly.
Get in touch
Found a bug? Have a calculator request? We'd love to hear from you. Drop us a line at [email protected] or visit the contact page.