About Us.

Our Story

Pregnancy Calculator was created with a simple goal: to provide a reliable, free, and private pregnancy estimation tool that anyone can use without signing up, sharing personal data, or paying hidden fees. In a world where health data is increasingly commodified, we believe that basic pregnancy information should remain accessible and confidential.

What We Offer

Our tool provides comprehensive pregnancy tracking capabilities that rival paid alternatives:

• Due Date Estimation — Using Naegele's Rule with automatic cycle-length adjustment for more personalized results.
• Multiple Calculation Methods — LMP, conception date, ultrasound reference, IVF transfer (Day 3 and Day 5), and reverse calculation from due date.
• Week-by-Week Timeline — A detailed breakdown of your pregnancy journey from week 1 through week 40, including trimester milestones and fetal development stages.
• 1:1 Baby Size Visualizer — A screen-calibrated visual representation of your baby's actual physical size at every week of pregnancy.
• Trimester Tracker — Visual progress bar showing where you are in your pregnancy journey across all three trimesters.

Our Commitment to Privacy

Unlike many online health tools, all calculations on our website run entirely in your browser. Your personal health information — including your last menstrual period, conception date, IVF transfer date, or any calculated results — is never transmitted to our servers or any third party. We cannot see, store, or access your data.

This architecture was a deliberate design choice. We believe that pregnancy estimation is a personal matter, and your health data should remain under your control.

Built for Accuracy

Our calculator uses clinically validated formulas used by obstetricians worldwide. The primary method, Naegele's Rule, adds 280 days to the first day of the last menstrual period. We go further by automatically adjusting for menstrual cycles that differ from the standard 28-day cycle, providing a more accurate and personalized estimated due date.

For IVF pregnancies, we support both Day 3 embryo transfers (transfer date + 263 days) and Day 5 blastocyst transfers (transfer date + 261 days), accounting for the exact developmental stage of the transferred embryo.

Always Free

Our pregnancy calculator is and will always be completely free. There are no registration walls, no subscription fees, no premium tiers, and no advertisements. We believe that access to basic pregnancy information should not be gated behind paywalls.

Medical Disclaimer

While we strive for accuracy, our tool provides estimates only. The information presented is for educational and informational purposes and should never replace professional medical advice. Always consult with a qualified healthcare provider for diagnosis, treatment, and personalized pregnancy guidance.

Get in Touch

Have questions, feedback, or suggestions? We'd love to hear from you. Visit our Contact Us page to reach out.