Welcome to OB Wheel Calculator, a professional digital tool designed for healthcare providers, medical students, and expectant parents.
Our Mission
Our mission is simple: to provide the most accurate, user-friendly, and secure obstetric calculator on the web. We believe that pregnancy mathematics should be transparent, accessible, and grounded in clinical standards.
Why We Built This
Historically, obstetricians used physical cardboard “pregnancy wheels” to calculate due dates. While these were useful, they were prone to human error and physical degradation. Digital calculators exist, but many are cluttered with advertisements, ask for unnecessary personal data, or fail to explain the methodology behind their calculations.
We built this platform to serve as a clean, fast, and medically reliable alternative. Our calculator uses the exact same formulas taught in medical schools—including Naegele’s Rule and adjustments for cycle length variations and IVF transfers.
Our Commitment to Privacy
We designed this tool with a strict privacy-first architecture. All calculations occur client-side in your browser. We never transmit or store your dates or health information.