Pregnancy Due Date & Gestational Age Calculator
Calculate estimated baby due date, current gestational age, and pregnancy trimesters by LMP.
Pregnancy Progression
Medical Disclaimer: Estimates are based on Naegele’s standard clinical rule (280 days). Ultrasound examinations provide the most accurate medical estimation.
Overview
Free online pregnancy due date calculator. Calculate estimated delivery date using Naegele’s clinical rule based on your last menstrual period or conception date.
Pregnancy Due Date & Gestational Age Calculator
The Due Date Calculator applies Naegele’s rule (280 days from Last Menstrual Period) to project your estimated delivery date and track current gestational weeks and trimesters.
How to Calculate Your Expected Due Date
Fast & IntuitiveSelect LMP First Day
Pick the first date of your last menstrual period.
Confirm Cycle Length
Adjust cycle length if differing from the 28-day standard.
View Pregnancy Timeline
Review estimated delivery date, trimester countdown, and week tracker.
Key Highlights & Advantages
Zero server uploads. Everything processes securely within your local browser memory.
Immediate results with no file upload or download queues.
No registration, no paywalls, and no hidden quotas.
Seamlessly optimized for mobile smartphones, tablets, and desktop workstations.
All data processing runs natively via W3C compliant browser hardware acceleration.
- Discuss your calculated due date with your obstetrician during your early dating ultrasound.
Related Guides
Frequently Asked Questions
1 Q&AsHow accurate is the LMP due date rule?
It estimates a 40-week milestone; roughly 90% of healthy births occur within two weeks before or after.
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