Pregnancy Due Date Calculator
Estimate your due date, gestational age, and trimester instantly
Enter Your Details
Note: LMP assumes a 28-day cycle with ovulation ~14 days after LMP. This is only an estimate — consult a healthcare professional for accuracy.
Results
How to Use This Calculator
1. Select the method you prefer: LMP (Last Menstrual Period) or Conception Date.
2. Enter the corresponding date in the input box.
3. Click “Calculate” to see your estimated due date, gestational age, and trimester details.
4. You can copy the summary or download it as a text file for your records.
Frequently Asked Questions
Q: How accurate is this calculator?
A: This is only an estimate. Each pregnancy is unique. Please consult a doctor for a medical due date scan.
Q: Which method should I choose?
A: If you know your Last Menstrual Period, use the LMP option. If you know the exact conception date, choose Conception Date.
Q: Why are there 280 and 266 days added?
A: A typical pregnancy is around 280 days from the LMP or about 266 days from conception.