Conceived Calculator Baby
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Reviewed by Calculator Editorial Team
Calculate your conception timeline and baby's estimated due date using our pregnancy calculator. Understand fertility windows and pregnancy weeks.
How to Use This Calculator
Enter your last menstrual period (LMP) date and the calculator will determine your estimated conception date and due date. The standard pregnancy duration is 40 weeks (280 days).
Note: This calculator provides estimates only. Individual pregnancy lengths may vary.
Understanding the Results
The calculator shows three key dates:
- Last Menstrual Period (LMP): The first day of your last menstrual cycle.
- Estimated Conception Date: Typically 14 days after LMP (average ovulation).
- Estimated Due Date: 280 days (40 weeks) after conception.
Example Calculation
If your LMP was January 1, 2023:
- Estimated conception: January 15, 2023
- Estimated due date: November 1, 2023
Fertility Window
The fertility window is the time when you're most likely to conceive. It typically occurs:
- 5 days before ovulation
- Through ovulation day
- 1 day after ovulation
For most women, ovulation occurs about 14 days after the first day of their last menstrual period.
Pregnancy Weeks
Pregnancy is divided into three trimesters:
- First trimester: Weeks 1-12
- Second trimester: Weeks 13-28
- Third trimester: Weeks 29-40
Key milestones include:
- Week 8: Fetal heart can be heard
- Week 12: Baby's limbs are visible
- Week 20: Baby can hear sounds
- Week 28: Baby can taste
Frequently Asked Questions
How accurate is this calculator?
This calculator provides estimates based on average pregnancy duration. Individual pregnancies may vary by several days.
What if I don't know my LMP date?
You can estimate your LMP by counting backwards 28 days from your expected due date or using ovulation predictor kits.
Can I use this for multiple pregnancies?
Yes, you can calculate dates for each pregnancy separately by entering different LMP dates.
What if my pregnancy is high-risk?
Consult with your healthcare provider for personalized advice regarding high-risk pregnancies.