Pregnancy Calculator
Estimate your due date, current pregnancy week, and remaining days using the first day of your last menstrual period.
This calculator provides an estimate only and does not replace medical advice or an ultrasound-based due date assessment.
How to Use the Pregnancy Calculator
Enter the first day of the last menstrual period or the requested pregnancy date information to estimate gestational timing and a projected due date.
Practical Example
If the first day of the last menstrual period was January 1, the calculator estimates pregnancy milestones using standard calendar-based pregnancy timing.
Factors That Affect the Result
Cycle length, ovulation timing, assisted reproduction, ultrasound dating and individual medical factors can change the clinical estimate. Use the result as a general reference.
Frequently Asked Questions
Is the estimated due date exact?
No. It is an estimate and actual delivery can occur before or after that date.
Can irregular cycles affect the estimate?
Yes. Irregular ovulation can make last-period dating less precise.
Should ultrasound dating override this calculator?
Clinical dating decisions should be made by a qualified healthcare professional.