Pregnancy Calculator: Track Your Pregnancy Journey
Estimate your pregnancy schedule, including due date, conception date, and key milestones, using your last period, ultrasound, or IVF transfer date. Trusted by expecting parents worldwide.
Your Pregnancy Schedule
Estimated Due Date
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Weeks Pregnant Today
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Conception Date
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Current Trimester
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Pregnancy Progress
Pregnancy Tips
Consult your doctor for personalized advice.
Schedule regular prenatal checkups.
Stay hydrated and eat a balanced diet.
More Tools to Explore:
Your Guide to Pregnancy Calculations
What’s a Pregnancy Calculator?
A Pregnancy Calculator estimates your pregnancy schedule, including due date, conception date, and milestones, based on inputs like last menstrual period (LMP), due date, ultrasound, conception date, or IVF transfer date. It’s a helpful tool for expecting parents to plan their journey.
How Pregnancy Dates Are Calculated
Key calculations based on input type:
Last Menstrual Period (LMP):
Due date = LMP + 280 days (40 weeks). Conception ~2 weeks after LMP.
Due Date:
LMP = Due date - 280 days. Conception ~266 days before due date.
Conception Date:
Due date = Conception + 266 days. LMP ~2 weeks before conception.
Ultrasound:
Due date based on weeks pregnant at ultrasound date.
IVF Transfer:
Due date based on transfer date (3-day or 5-day embryo).
Our calculator simplifies these for you!
Understanding Your Results
Your pregnancy schedule includes:
| Component | Description |
|---|---|
| Due Date | Estimated delivery date (40 weeks from LMP). |
| Weeks Pregnant | How far along you are today (as of May 26, 2025). |
| Conception Date | Estimated date of conception (~2 weeks after LMP). |
| Trimester | Current stage: 1st (0–13 weeks), 2nd (14–27 weeks), or 3rd (28–40 weeks). |
Why Use a Pregnancy Calculator?
Planning your pregnancy is easier with this tool:
Plan Ahead
Know key dates to prepare for your baby.
Track Progress
Monitor your pregnancy milestones.
Share Joy
Share your due date with loved ones.
Key Considerations for Pregnancy Calculations
Ensure accurate results with these insights:
Estimates are based on standard 40-week pregnancies but may vary. Ultrasound-based calculations are typically more precise. Always consult your doctor for confirmation.
LMP-based calculations assume a 28-day cycle. Irregular cycles may affect accuracy. Use ultrasound or conception date for better results.
IVF calculations use the transfer date (3-day or 5-day embryo). Due dates are estimated at 38–40 weeks from transfer, depending on embryo stage.
Frequently Asked Questions About Pregnancy Calculations
Got questions about our Pregnancy Calculator? Here are answers to help expecting parents plan their journey:
Due date is typically 40 weeks (280 days) from the first day of your last menstrual period (LMP). For other inputs (e.g., ultrasound, IVF), it’s adjusted based on weeks pregnant or embryo transfer timing.
Yes! You can use your due date, conception date, ultrasound date, or IVF transfer date. Ultrasound is especially reliable if LMP is uncertain.
Ultrasound-based calculations are often the most accurate, as they measure fetal development directly. LMP assumes a standard cycle, which may vary.
Absolutely! All calculations are done locally in your browser, and no data is stored or shared. However, consult your doctor for medical advice.
Yes! Use the share buttons to post your due date or weeks pregnant on Twitter, Facebook, or WhatsApp to share the excitement with family and friends.