Pregnancy Calculator
Our Online Pregnancy Calculator is an easy-to-use tool that helps expectant parents track their pregnancy journey. Just entering the first day of your last menstrual period, you can calculate your due date, current week of pregnancy, trimester, and other important milestones.
Your Pregnancy Timeline
About Pregnancy Calculation
Pregnancy is typically calculated from the first day of your last menstrual period (LMP), which is about 2 weeks before conception actually occurs. A full-term pregnancy is about 40 weeks (280 days) from the LMP.
First Trimester
Weeks 1 to 13
Second Trimester
Weeks 14 to 27
Third Trimester
Weeks 28 to 40
How to Use the Pregnancy Calculator
- Enter your first day of last menstrual period(LMP) date.
- Enter your Average Cycle Length (days) by default 28.
- Click “Calculate” button.
- View your estimated due date, current week, trimester, and other important dates.
Why Use Our Pregnancy Due Date Calculator?
Accuracy: This calculator uses the same calculation method healthcare providers use.
Comprehensive: Our calculator provides more than just a due date – includes trimester info, conception date, and milestone dates.
Educational: Learn about pregnancy timelines and fetal development stages.
Free: This calculator completely free tool with no registration required.
Example Calculation
If I enter
First Day of Last Menstrual Period (LMP): 05/15/2025
Average Cycle Length (days): 28
Your Pregnancy Timeline
Frequently Asked Questions (FAQs)
1. How accurate is the pregnancy calculator?
This calculator provides an estimate based on standard pregnancy calculations. Actual due dates may vary based on individual factors. Only your healthcare provider can give you a definitive due date.
2. Can I rely on this calculator instead of seeing a doctor?
No, always consult a doctor.
3. What if my cycle isn't 28 days long?
Our calculator allows you to adjust for different cycle lengths. If your cycle is longer or shorter than 28 days, you can input your average cycle length for a more accurate due date estimation.
4. Can this calculator tell me my baby's gender?
No, the pregnancy calculator cannot predict your baby’s gender. This requires medical testing like ultrasound or genetic testing.
5. How often should I use the calculator?
You can use it as often as you like to track your progress. Many people check weekly to see their updated pregnancy week.
6. Is my information stored when I use the calculator?
No, we don’t store any of your personal information. All calculations happen on your device, and your data never leaves your browser.
7. What's the difference between gestational age and fetal age?
Gestational age (what we calculate) is measured from the first day of your last period. Fetal age is measured from actual conception and is typically about two weeks less.
8. Can I use this calculator if I've had IVF treatment?
For IVF pregnancies, the calculation method differs. You should use your embryo transfer date rather than LMP for the most accurate results.
Disclaimer: Our Pregnancy Calculator is designed to be a helpful tool for expectant parents, but it’s not a substitute for professional medical advice. Always consult with your healthcare provider for personalized information about your pregnancy.