Pregnancy Calculator
Calculate your due date, current gestational age, and important pregnancy milestones. Track fetal development.
Calculate Your Pregnancy
Enter your last menstrual period (LMP) date and other information, and we will calculate your due date and important pregnancy milestones.
A normal menstrual cycle is 21-35 days. If unsure, use the default value of 28 days.
About Pregnancy Calculation
The pregnancy calculator uses the last menstrual period (LMP) date and other information to estimate the due date and important pregnancy milestones. A standard pregnancy lasts 40 weeks (280 days), calculated from the first day of the last menstrual period.
Calculation Methods:
- LMP-Based Calculation: Estimated Due Date = LMP + 280 days, adjusted for menstrual cycle length.
- Ultrasound-Based Calculation: If ultrasound data is provided, the system calculates a more accurate due date based on CRL or estimated gestational age.
- Priority: Ultrasound data is generally more accurate than LMP calculations, especially in early ultrasounds (8-12 weeks).
Important Notes:
- The actual delivery date may differ from the estimated due date by about two weeks, which is normal.
- Only about 4% of babies are born on their exact due date.
- This calculator is for informational purposes only and does not replace professional medical advice.
- Please have regular prenatal check-ups and follow your doctor's advice.
Disclaimer: The information provided by this calculator is for informational purposes only and does not constitute medical advice. All pregnancy-related decisions should be made under the guidance of a healthcare professional.