Pregnancy Calculator
When was your last menstrual period?
Select the first day of your last menstrual period to calculate your due date
Your Pregnancy Timeline
Your Baby This Week
Select your last period date to see your baby’s development.
- • First prenatal visit: Week 8-10
- • Genetic screening: Week 10-13
- • Anatomy scan: Week 18-22
- • Glucose screening: Week 24-28
Ready to Calculate?
Select your last menstrual period date above to see your pregnancy timeline
Pregnancy Calculator
A Pregnancy Calculator is a helpful online tool that estimates important stages of pregnancy, such as the due date, conception date, and trimester timelines. By entering details like your last menstrual period (LMP), due date, ultrasound date, conception date, or IVF transfer date, you can quickly understand your pregnancy schedule with accuracy.
What is a Pregnancy Calculator?
A pregnancy calculator is designed to help expectant mothers predict their estimated due date (EDD) and track the progress of pregnancy. It works by analyzing the provided information and giving a personalized pregnancy timeline, including the start and end of each trimester.
Doctors usually calculate pregnancy based on the first day of the last menstrual period, but calculators make the process much easier for women to check from home.
How Does the Pregnancy Calculator Work?
The calculator works by applying standard medical formulas:
1. Last Menstrual Period (LMP):
Most common method.
Due date is usually calculated as 40 weeks from the first day of your last period.
2. Due Date:
If your doctor has already given you an estimated due date, the calculator will backtrack to estimate your conception date and pregnancy milestones.
3. Ultrasound Date:
Early ultrasound scans help determine the gestational age. Entering this date can refine your pregnancy timeline.
4. Conception Date:
If you know the exact date of conception, the calculator can estimate the due date more precisely.
5. IVF Transfer Date:
For women who underwent IVF (In Vitro Fertilization), the calculator uses the embryo transfer date to provide an accurate pregnancy schedule.
Why Use a Pregnancy Calculator?
Using a pregnancy calculator comes with many benefits:
• Track your due date: Know when your baby is expected to arrive.
• Trimester planning: Understand which stage of pregnancy you are in.
• Medical appointments: Helps in scheduling ultrasounds, tests, and checkups.
• Better preparation: Plan ahead for maternity leave, baby shopping, and delivery.
Pregnancy Term & Due Date
Pregnancy is a beautiful phase in a woman’s life that usually lasts around 9 months. Medically, pregnancy is defined as the period during which one or more babies develop inside a woman’s womb. On average, childbirth happens about 38 weeks after conception or around 40 weeks after the last menstrual period (LMP).
According to the World Health Organization (WHO), a normal pregnancy term ranges between 37 to 42 weeks. Doctors typically provide an estimated due date (EDD) during the first OB-GYN (obstetrics and gynecology) visit, either through an ultrasound scan or by calculating from the woman’s last menstrual period.
What is a Pregnancy Term?
The pregnancy term refers to the duration of pregnancy. It is generally divided into three trimesters:
• First Trimester (0–13 weeks): Early pregnancy, where major organs begin to develop.
• Second Trimester (14–27 weeks): Growth phase, often considered the most comfortable period.
• Third Trimester (28–40 weeks): Final stage, where the baby gains weight and prepares for birth.
A full-term pregnancy is considered 37–42 weeks, but the exact length can vary from one woman to another.
What is a Due Date?
A due date is the expected date of delivery (EDD), which helps determine when the baby might be born. While the due date is an important guideline, it is not always exact. Doctors usually calculate it in two ways:
1. Based on Last Menstrual Period (LMP):
• Most common method.
• Pregnancy is calculated as 40 weeks from the first day of your last period.
2. Based on Ultrasound Scan:
• Early ultrasounds (usually in the first trimester) can provide more accurate dating, especially if the mother has irregular cycles.
Pregnancy Detection
Detecting pregnancy early is important for proper care, lifestyle changes, and timely medical consultation. Pregnancy can be identified either by recognizing symptoms in the body or through pregnancy tests that measure specific hormones.
Early Signs of Pregnancy
Many women notice early pregnancy symptoms before even taking a test. Common signs include:
• Missed menstrual period – One of the earliest and most common signs.
• Increased basal body temperature (BBT) – A consistently high BBT after ovulation can signal pregnancy.
• Fatigue – Feeling unusually tired due to rising hormone levels.
• Nausea or morning sickness – A classic pregnancy symptom, often starting around week 4–6.
• Frequent urination – Caused by hormonal changes and increased blood flow to the kidneys.
While these symptoms can indicate pregnancy, they may also be linked to other health conditions. Therefore, medical confirmation is necessary.
Pregnancy Week Calculator
A Pregnancy Week Calculator is a simple yet powerful tool that helps expecting mothers track their pregnancy week by week. Since pregnancy usually lasts around 40 weeks (about 9 months), knowing exactly which week you are in helps you understand your baby’s development and your body’s changes.
By using a pregnancy calculator week by week, you can get a clear picture of your due date, trimester stages, and baby growth milestones.
Pregnancy Calculator – Week by Week
Using a pregnancy calculator week by week, you can track changes in both mother and baby:
• Weeks 1–4: Fertilization and implantation take place. Early pregnancy symptoms may begin.
• Weeks 5–8: Baby’s heart starts beating, and organs begin forming.
• Weeks 9–12: End of the first trimester; baby’s features become more distinct.
• Weeks 13–20: Second trimester starts; gender may be identified via ultrasound.
• Weeks 21–28: Baby’s senses develop; mother feels stronger kicks.
• Weeks 29–36: Baby gains weight quickly; preparations for birth begin.
• Weeks 37–40: Full-term pregnancy; labor may start anytime.
This week-by-week guide helps expecting parents know what to expect at each stage.
Month Pregnancy Week Calculator
Pregnancy is usually measured in weeks, but many people prefer to understand it in months. A month pregnancy week calculator converts weeks into months for easier tracking:
• Month 1: Weeks 1–4
• Month 2: Weeks 5–8
• Month 3: Weeks 9–13
• Month 4: Weeks 14–17
• Month 5: Weeks 18–22
• Month 6: Weeks 23–27
• Month 7: Weeks 28–31
• Month 8: Weeks 32–35
• Month 9: Weeks 36–40
This helps parents plan milestones like doctor visits, ultrasounds, and maternity preparations.
IVF Pregnancy Calculator
An IVF Pregnancy Calculator is a specialized tool designed for women who have conceived through In Vitro Fertilization (IVF). Unlike natural conception, where the exact date can be uncertain, IVF provides a clearer starting point because the embryo transfer date is known. This makes pregnancy calculations more precise and reliable.
Conception Date Meaning
The conception date is one of the most important terms in pregnancy. It refers to the exact day when a woman’s egg is fertilized by a man’s sperm, marking the very beginning of pregnancy. Understanding the meaning of conception date helps in tracking pregnancy weeks, calculating the due date, and knowing the baby’s developmental stages.
FAQs
How will I calculate my pregnancy?
You can calculate your pregnancy by determining the time elapsed since the first day of your last menstrual period (LMP). Most doctors and pregnancy calculators use this method because ovulation and conception usually occur about two weeks after the LMP. Based on this, your pregnancy is typically measured in weeks and days, not months.
For more accuracy, you can use an online Pregnancy Calculator or consult a doctor who may confirm your due date through ultrasound. These tools and methods help estimate:
• Your current week of pregnancy
• The expected due date (EDD)
• Important milestones like the end of each trimester
This calculation helps both you and your healthcare provider track your baby’s growth and plan prenatal care effectively.
How is day 1 of pregnancy calculated?
Day 1 of pregnancy is usually calculated from the first day of your last menstrual period (LMP), not the actual day of conception. This method is commonly used by doctors and pregnancy calculators because the exact date of ovulation and fertilization can be difficult to determine.
Since ovulation generally occurs about 14 days after the start of the menstrual cycle, counting from the LMP provides a standard way to measure pregnancy. This means that by the time you conceive, you are already considered two weeks pregnant according to medical calculations.
This approach helps doctors track pregnancy progress, estimate the due date, and monitor important milestones during each trimester.
How do I calculate when I got pregnant?
To calculate when you got pregnant, the most common method is to count about two weeks after the first day of your last menstrual period (LMP). This is because ovulation — the time when conception is most likely — usually happens around the 14th day of a regular 28-day cycle.
You can estimate the conception date in two ways:
1. Using your LMP – Add about 14 days to the start date of your last period.
2. Using an online Pregnancy Calculator – Enter your LMP or due date to get an estimated conception date.
3. Through an ultrasound – In early pregnancy, doctors may use ultrasound measurements to provide a more accurate conception window.
Keep in mind that conception dates are always an estimate, as ovulation can vary depending on cycle length and individual health factors.
What is 1 week pregnancy?
When doctors refer to 1 week of pregnancy, it does not mean the baby has already been conceived. Instead, pregnancy is counted from the first day of your last menstrual period (LMP). This means that during week 1, your body is actually preparing for ovulation and fertilization, but conception hasn’t happened yet.
By starting the count from the LMP, healthcare providers can easily track pregnancy progress and estimate the due date. Actual conception usually occurs in week 2, around the time of ovulation.
So, 1 week pregnant medically refers to the start of your menstrual cycle, which is used as the official starting point of pregnancy.