Empowering mothers with precise, clinical-grade pregnancy timelines and growth tracking. Sync your dates instantly to our Gynosakhi App for AI-driven obstetric care.
Find out your estimated due date, current gestational age, and baby size.
Our pregnancy algorithms, trimester calculations, and health insights are constructed based on peer-reviewed clinical guidelines and approved by certified medical practitioners.
Calculations adhere to standard clinical guidelines set by the American College of Obstetricians and Gynecologists.
All symptom data, logs, and profile records inside our applications are encrypted and kept strictly confidential.
Medical resources are written and periodically updated by an expert board of OB-GYNs and child care advisors.
See how expecting parents use our calculators and Gynosakhi AI daily to support their pregnancy milestones.
"The gestational calculator gave me the exact due date that my OB-GYN later confirmed. Using the Gynosakhi app is like having a physician in the family — I get answers in seconds whenever I'm anxious."
"I track my weeks with the timeline widget on this site and read the week-by-week guides constantly. The app's AI chatbot is amazing at listing which medications are safe during the first trimester."
"Best IVF calculator out there. The 3-day and 5-day transfer inputs are accurate down to the day. Syncing the dates into Gynosakhi was extremely smooth!"
Finding out you are expecting is an exciting milestone. One of the first questions on every parent's mind is: When will the baby arrive? Our Baby Due Date Calculator uses clinically validated standards, aligned with the guidelines of the American College of Obstetricians and Gynecologists (ACOG), to help you determine your estimated delivery date (EDD).
By entering the first day of your last menstrual period (LMP) and your average cycle length, or your conception date, or IVF transfer details, this calculator determines your due date and provides a detailed breakdown of your current trimester progress and baby size analogy.
An accurate Estimated Due Date (EDD) is the cornerstone of your prenatal care. It is not just about counting down the days; it serves several critical clinical and practical purposes:
Our calculator supports three common clinical calculation methods depending on the data you have available:
Formula: EDD = LMP + 280 days + (Cycle Length - 28 days)Formula: EDD = Conception Date + 266 daysFormula (5-Day Transfer): EDD = Transfer Date + 261 daysFormula (3-Day Transfer): EDD = Transfer Date + 263 daysTo compute your due date:
Example Calculation: If the first day of your last period (LMP) was October 1, 2025, and you have a regular 28-day cycle, our calculator adds 280 days to October 1, outputting an Estimated Due Date of July 8, 2026. If your cycle length was 30 days, the calculator adds an extra 2 days, making the due date July 10, 2026.
Once calculated, you will receive:
Unlike basic calculators, our tool is tailored to your unique cycle dynamics, accounts for IVF transfers, and syncs seamlessly with the Gynosakhi App ecosystem. Expecting mothers in India can monitor maternal updates, log daily symptoms, check medication safety scores, and receive guidance from our AI doctor assistant.
While this calculator provides an excellent starting estimate, you should schedule a prenatal appointment as soon as you get a positive pregnancy test. Your doctor will perform a physical exam and a first-trimester dating ultrasound (usually between weeks 8 and 12) to verify the fetal heartbeat and confirm your due date with high accuracy. Seek immediate medical attention if you experience severe cramping, heavy vaginal bleeding, or persistent vomiting.
Clinical Disclaimer: The calculations, timelines, and guides provided on this page are for educational and planning purposes only. They are based on clinical standards from ACOG, but do not replace professional medical advice, diagnosis, or clinical ultrasound assessments from your OB-GYN.
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Medical answers to standard queries regarding pregnancy calculations, due dates, and trimester guidelines.
Your estimated due date (EDD) is only an approximation. Only about 4% of babies are born on their exact due date. Most babies arrive between 37 and 42 weeks of pregnancy, which is considered the normal, healthy range for full-term delivery.
The most common method is Naegele's rule, which calculates from the first day of your Last Menstrual Period (LMP). Other clinical methods include back-calculating from the date of conception, using IVF transfer dates (adjusting for 3-day or 5-day embryos), and measuring crown-rump length during an early first-trimester ultrasound.
Standard due date calculators assume a typical 28-day menstrual cycle with ovulation occurring on day 14. If your cycle is shorter or longer, the timing of ovulation changes. For example, a 32-day cycle means you ovulated around day 18, which pushes your estimated due date out by 4 days.
First-trimester ultrasounds (performed before 14 weeks) are considered the most accurate method for dating a pregnancy. If the ultrasound due date differs from your LMP due date by more than 7 days, your doctor will adjust your official due date to match the ultrasound measurements.
In IVF, the exact date of embryo transfer is known. To calculate the due date, clinicians add 261 days to the transfer date for a 5-day blastocyst, or 263 days for a 3-day cleavage-stage embryo. This replaces the estimated ovulation date used in natural conception.
Yes, your doctor might adjust your due date during the first trimester if early ultrasound measurements of the fetus's crown-rump length (CRL) show a significant discrepancy with your LMP calculations. Due dates are rarely adjusted in the second or third trimesters, as fetal growth rates naturally vary more later in pregnancy.
A baby born at 37 weeks is clinically classified as 'early term.' While the baby is fully formed and generally healthy, it is best for development if the pregnancy continues to full term (39 to 40 weeks) if there are no medical complications.
Gestational age measures the age of the pregnancy starting from the first day of your last period, meaning you are considered 2 weeks pregnant before conception even occurs. Fetal age (conception age) is the actual biological age of the developing baby, starting from fertilization, which is almost always 2 weeks shorter than gestational age.
If your cycles are irregular or you do not remember your last period, calculating your due date using LMP is unreliable. In these cases, your healthcare provider will perform an early dating ultrasound (usually between weeks 8 and 12) to measure the size of the embryo and establish your official due date.
Most first-time mothers begin to feel baby movements (known as quickening) between weeks 18 and 22. If you have been pregnant before, you may notice these gentle flutterings as early as 16 weeks, as you are more familiar with the sensation.