Due Date Calculator Pakistan
Calculate your baby's expected due date based on last menstrual period (LMP) and cycle length.
How to use this calculator
- Enter first day of last menstrual period
- Adjust cycle length if not 28 days
- Click to see due date and conception date
Frequently asked questions
How accurate is the due date calculator?
The calculator uses Naegele's rule (LMP + 280 days), accurate within 1-2 weeks for most pregnancies. Only ~5% of babies are born exactly on due date — most arrive within 2 weeks before/after.
What is EDD?
EDD (Estimated Due Date) is when your baby is expected to arrive — 40 weeks from your last menstrual period. Also called 'expected date of delivery' or 'guess date' since exact timing varies.
When was conception?
Conception typically occurs ~14 days after LMP (during ovulation) for women with 28-day cycles. For longer/shorter cycles, conception date adjusts accordingly. The calculator factors this in.
Why does cycle length matter?
Standard formula assumes 28-day cycle. Longer cycles (32 days) mean later ovulation, so due date shifts later. Shorter cycles (24 days) mean earlier ovulation. Adjust cycle length for accuracy.
Should I rely on this or ultrasound?
Ultrasound dating in first trimester (8-13 weeks) is most accurate. If your LMP-based and ultrasound dates differ by more than 1 week, ultrasound is preferred. This calculator gives an estimate; consult your doctor.
What if my baby comes early or late?
Term: 37-42 weeks is normal. Preterm: before 37 weeks (need NICU care). Late term: 41-42 weeks. Post-term: after 42 weeks (induction usually offered). Most births occur 38-41 weeks.