First, a pregnancy due date calculator helps expectant mothers predict their baby's arrival. This tool provides an estimated delivery date based on your last menstrual period. Consequently, it assists in planning prenatal care and preparations.
Moreover, knowing your due date helps track important developmental milestones. Additionally, it allows healthcare providers to monitor both mother and baby's health. Ultimately, this calculator offers valuable insights for your pregnancy journey.
Specifically, a pregnancy due date marks your baby's expected arrival date. Typically, pregnancy lasts about 40 weeks from conception. However, only about 5% of babies arrive exactly on their due date.
Furthermore, your due date is crucial for prenatal scheduling. For instance, it determines timing for important tests and ultrasounds. Therefore, accurate estimation supports optimal pregnancy care.
Our advanced pregnancy due date calculator uses medical standards to provide the most accurate estimation. Simply enter your last menstrual period date below:
Estimated Due Date:
Current Gestational Age:
You are in your:
To determine your due date, healthcare providers use a standard calculation method. Initially, they identify the first day of your last menstrual period. Then, they add 280 days (40 weeks) to this date.
Alternatively, you can use Naegele's Rule: Add 1 year, subtract 3 months, and add 7 days. This calculation assumes a regular 28-day menstrual cycle. However, cycle length variations may affect accuracy.
Ultrasound measurements during early pregnancy provide the most precise due date estimation. Especially, first-trimester ultrasounds can predict delivery dates within 3-5 days. Therefore, always consult your healthcare provider for confirmation.
(Known as Naegele's Rule - the standard calculation method used by healthcare professionals)
Our pregnancy due date calculator uses established medical principles. First, it takes your last menstrual period (LMP) date. Then, it adds 280 days (40 weeks) to calculate your estimated due date.
Additionally, the calculator determines your current gestational age. It compares today's date with your LMP. Consequently, it shows how many weeks and days pregnant you are.
The calculator also identifies your current trimester. Pregnancy trimesters divide the 40-week journey into three phases. Each phase has unique developmental milestones.
| Trimester | Weeks | Key Developments |
|---|---|---|
| First | 1-12 weeks | Baby's organs form, heartbeat begins |
| Second | 13-26 weeks | Baby moves, gender visible, organs mature |
| Third | 27-40 weeks | Rapid growth, position for birth, lungs mature |
Due date calculators provide estimates based on standard calculations. Typically, they're accurate within a week when using your LMP. However, early ultrasound dating is more precise. Always consult your doctor for confirmation.
Yes, due dates may adjust based on ultrasound findings. Early ultrasounds (before 13 weeks) provide the most accurate dating. Your healthcare provider may update your due date accordingly.
If you're unsure about your LMP, an early ultrasound can determine gestational age. Alternatively, track ovulation dates if possible. Consult your doctor for the most accurate estimation.
No, only about 5% of babies arrive on their exact due date. Most births occur between 37-42 weeks. Full-term pregnancy spans from 39-40 weeks and 6 days.
First trimester: Weeks 1-12. Second trimester: Weeks 13-26. Third trimester: Weeks 27-40+. The calculator automatically detects your current stage based on gestational age.