Pregnancy Calculator
Pregnancy is an exciting journey, and knowing how many weeks pregnant you are or when your baby is due is one of the most common questions for expecting parents. Our Pregnancy Calculator helps you calculate pregnancy weeks, estimate your pregnancy due date, and understand your expected delivery date accurately using your Last Menstrual Period (LMP).
This tool is also known as a pregnancy weeks calculator, pregnancy due date calculator, or delivery date calculator, and it is widely used by doctors and healthcare professionals.
Calculate Pregnancy Weeks Easily
Many people search for “calculate pregnancy weeks” to understand how far along their pregnancy is. Pregnancy weeks are calculated from the first day of your last menstrual period (LMP), not from the day of conception.
Using this pregnancy calculator, you can:
- Find how many weeks and days pregnant you are
- Track pregnancy progress week by week
- Understand which trimester you are in
This makes it easier to plan doctor visits, scans, and important pregnancy milestones.
Pregnancy Due Date Calculator – Find Your Expected Delivery Date
One of the most common searches during pregnancy is “pregnancy due date calculator” or “delivery date calculate”. Knowing your due date helps you prepare mentally, physically, and emotionally for childbirth.
Our calculator estimates your expected delivery date (EDD) by adding 40 weeks (280 days) to the first day of your LMP. This method is medically accepted and commonly used worldwide.
Why Due Date Calculation Matters
- Helps plan maternity leave
- Prepares for hospital visits
- Tracks baby’s growth stages
- Helps doctors schedule scans and tests
Even though babies may arrive a little earlier or later, your due date gives a reliable estimate.
How Is Pregnancy Calculated Using LMP?
Pregnancy is calculated using the Last Menstrual Period (LMP) because the exact date of conception is often difficult to determine. This is why doctors use LMP-based pregnancy calculation.
Pregnancy Calculation Formula (Simple Explanation)
- Pregnancy length = 40 weeks
- Start date = First day of last period
- Result = Expected delivery date
Using a pregnancy calculator by LMP, you get:
- Total pregnancy weeks
- Remaining weeks until delivery
- Accurate due date estimate
Delivery Date Calculate – How Accurate Is It?
Many people ask, “How accurate is a delivery date calculator?”
The answer is: it is highly accurate for estimation, but childbirth may vary slightly.
Only about 5% of babies are born exactly on the due date, but most deliveries happen within 2 weeks before or after the estimated date.
This is why doctors focus more on pregnancy weeks rather than the exact day.
Pregnancy Weeks Breakdown (Trimester Guide)
Understanding pregnancy weeks helps you know what stage you are in.
First Trimester (Weeks 1–12)
- Early development begins
- Morning sickness and fatigue are common
- Important scans are scheduled
Second Trimester (Weeks 13–26)
- Baby growth becomes more noticeable
- Energy levels improve
- Gender scan may be done
Third Trimester (Weeks 27–40)
- Baby gains weight rapidly
- Regular checkups increase
- Delivery preparation begins
A pregnancy weeks calculator helps track all these stages accurately.
How to Use the Pregnancy Calculator?
Using the calculator is very simple:
- Select the first day of your last menstrual period
- Click on Calculate
- Instantly see:
- Pregnancy weeks and days
- Expected delivery date
- Total days of pregnancy
This tool works on both mobile and desktop, making it easy to use anytime.
Who Should Use a Pregnancy Due Date Calculator?
This tool is helpful for:
- Expecting mothers
- Couples planning pregnancy
- Healthcare awareness
- Pregnancy tracking at home
If you are wondering “how many weeks pregnant am I?”, this calculator gives instant clarity.
Pregnancy Calculator vs Ultrasound Dating
While ultrasound scans can help estimate pregnancy age, early pregnancy calculation using LMP is usually the first and most common method.
Doctors may adjust the due date later based on scan results, but the LMP-based pregnancy calculator is the starting point for most pregnancies.
Benefits of Using an Online Pregnancy Calculator
✔ Easy to use
✔ Instant results
✔ Calculates pregnancy weeks accurately
✔ Estimates delivery date
✔ No registration required
✔ Free pregnancy calculator
This makes it one of the most convenient tools for pregnancy tracking.
Frequently Asked Questions
How many weeks pregnant am I?
You can calculate how many weeks pregnant you are by entering your LMP date into the pregnancy calculator.
Can I calculate pregnancy due date without ultrasound?
Yes, you can calculate pregnancy due date using LMP with a pregnancy calculator.
Is pregnancy calculated from conception?
No, pregnancy is calculated from the first day of the last menstrual period.
Is this delivery date calculator accurate?
It provides a medically accepted estimate, but actual delivery may vary.