Built for expecting parents,
not for paywalls
A free, honest, and private pregnancy due date calculator — no sign-up, no data collection, no corporate agenda.
An independent pregnancy health platform
Drivenly.xyz started with a simple observation. Expecting parents spend a lot of time searching for reliable pregnancy information online, only to find tools that are cluttered, confusing, or locked behind sign-up walls. We wanted to build something different — clean, honest, and genuinely useful for anyone navigating pregnancy, from the moment of that first positive test to the anticipation of their due date.
No hospital affiliation. No pharmaceutical backing. No corporate agenda. Just a small team that believes access to basic pregnancy information should be free, simple, and transparent.
Free tools. Trusted science. No strings attached.
At its core, Drivenly.xyz offers a free, accurate pregnancy due date calculator. We help expecting parents estimate their due date, track key milestones, and understand where they are in their pregnancy journey — all directly from the browser, with no sign-up required and no personal data stored.
Our calculator is built on methods recognized by the World Health Organization and the American College of Obstetricians and Gynecologists, including Naegele's Rule and last menstrual period (LMP) dating. We take trusted methodologies and make them accessible to anyone with an internet connection.
Information is the foundation of good care
We believe that a pregnancy is one of the most meaningful experiences in a person's life, and that access to clear, reliable information should be part of that experience from the start. When parents understand their timeline, their trimesters, and their milestones, they are better equipped to prepare, ask the right questions at prenatal appointments, and feel more confident in their journey.
A calculator is not a clinician. An estimated due date is not a guarantee. We are committed to being honest about that distinction rather than overstating what our tools can offer. Every result on Drivenly comes with context, and that context always includes a reminder to speak with your healthcare provider.
We also recognize that pregnancy can be an emotionally complex experience — including for those navigating loss, fertility challenges, high-risk pregnancies, or unexpected news. We take that seriously and have built our platform with sensitivity and care in mind.
Four things we never compromise on
Accuracy
Our formulas are based on ACOG and WHO guidelines, reviewed regularly as obstetric guidance evolves.
Privacy
Every date you enter stays on your device. We never transmit, store, or sell your health information.
Free Access
No paywalls, no subscriptions, no accounts required. Fully free, forever, for everyone.
Honesty
We tell you what our tools can and can't do — and we always point you to a real healthcare provider.
We keep up with the science, so you don't have to
Health science evolves. Obstetric guidelines get updated. We do not treat our calculator as a set-and-forget tool. We review our content on a regular basis and update it whenever the underlying science or clinical guidance calls for a change. Our last comprehensive review was completed in June 2026.
If you ever notice something that looks outdated, seems inaccurate, or contradicts recent published research, we genuinely want to know. You can reach us at legal@drivenly.xyz and we treat every correction flag as a priority.
Your data never leaves your device
We built Drivenly.xyz with privacy as a default, not an afterthought. Every value you enter into our calculator stays on your device. We do not transmit your information to our servers, we do not build profiles of our users, and we do not sell data to anyone.
- No health data transmitted to our servers
- No user profiles or tracking across sessions
- Google Analytics only with your explicit consent
- Google AdSense ads served automatically — not hand-picked by us
Full details in our Privacy Policy →
Honest about what we are — and what we're not
Due date calculations are estimates, not certainties. The standard 40-week calculation assumes a 28-day cycle with ovulation on day 14. If your cycle is longer, shorter, or irregular, your actual due date may differ. Ultrasound dating — particularly in the first trimester — is often more accurate than LMP-based estimates and may revise the date your provider uses.
We include these caveats not to create uncertainty, but because we think you deserve a clear and honest picture of what you are working with. An informed parent is always better served than one given false precision.
Get in touch
Questions, feedback, inaccuracies, or just want to say hello — we genuinely enjoy hearing from the people who use Drivenly. We aim to reply within 30 days.