Pregnancy Week-by-Week Calculator
Current Pregnancy Week
–
Due Date
–
Trimester
–
Days Pregnant
–
About Our Pregnancy Week-by-Week Calculator
Our advanced pregnancy calculator helps you track your pregnancy journey week by week. By simply entering the first day of your last period and your average cycle length, you’ll get accurate estimates about your current pregnancy week, due date, trimester, and more.
How the Pregnancy Calculator Works
The calculator uses standard medical calculations to determine your pregnancy timeline:
- Due Date Estimation: Calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (Naegele’s rule)
- Current Week: Determined by counting weeks from your last period to today’s date
- Trimester Calculation: First trimester (weeks 1-12), second trimester (weeks 13-27), third trimester (week 28-birth)
Key Features of Our Pregnancy Week Calculator
Accurate Due Date Prediction
Get the most reliable due date estimation based on medical standards
Week-by-Week Tracking
Know exactly which pregnancy week you’re in for proper monitoring
Trimester Information
Understand which trimester you’re in and what to expect
Frequently Asked Questions
How accurate is the pregnancy week calculator?
Our calculator provides estimates based on standard medical calculations. For precise dating, consult your healthcare provider who may use ultrasound measurements.
What if I don’t know my last menstrual period date?
If you’re unsure about your LMP, an early ultrasound can provide more accurate dating. The calculator works best when you know the first day of your last period.
Does cycle length affect due date calculation?
Yes, women with longer or irregular cycles may need adjustments. Our calculator accounts for your specific cycle length for more accurate results.
Why Track Pregnancy Week by Week?
Monitoring your pregnancy week by week helps you:
- Understand fetal development milestones
- Prepare for prenatal tests and appointments
- Monitor your health and baby’s growth
- Plan maternity leave and baby preparations