Pregnancy Due Date Calculator Week By Week Calendar

Pregnancy Due Date Calculation:

\[ EDD = LMP + 280 \text{ days} \] \[ \text{Week Calendar} = \lfloor (\text{Current Date} - LMP) \div 7 \rfloor \]

Estimated Due Date (EDD):

Current Pregnancy Week:

Weeks Remaining:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Pregnancy Due Date Calculator?

The Pregnancy Due Date Calculator estimates your expected delivery date based on your last menstrual period and provides a week-by-week calendar of your pregnancy progress. It helps track fetal development and plan for prenatal care.

2. How Does the Calculator Work?

The calculator uses standard pregnancy calculation formulas:

\[ EDD = LMP + 280 \text{ days} \] \[ \text{Week Calendar} = \lfloor (\text{Current Date} - LMP) \div 7 \rfloor \]

Where:

\( EDD \) — Estimated Due Date
\( LMP \) — Last Menstrual Period (first day of last period)
\( \text{Current Date} \) — Today's date or any specified date
\( \text{Week Calendar} \) — Current pregnancy week

Explanation: Pregnancy is calculated as 40 weeks (280 days) from the first day of your last menstrual period, based on the assumption of a 28-day cycle with ovulation on day 14.

3. Importance of Due Date Calculation

Details: Accurate due date calculation is essential for proper prenatal care scheduling, monitoring fetal growth, preparing for delivery, and identifying potential pregnancy complications.

4. Using the Calculator

Tips: Enter the first day of your last menstrual period and the current date (or any date you want to check). The calculator will provide your estimated due date, current pregnancy week, and weeks remaining.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the due date calculation?
A: The due date is an estimate - only about 5% of babies are born exactly on their due date. Most births occur within 2 weeks before or after the estimated date.

Q2: What if I don't know my LMP?
A: If you're unsure of your LMP, an ultrasound in the first trimester can provide a more accurate due date estimation.

Q3: Does this work for irregular cycles?
A: The calculation assumes a 28-day cycle. If you have irregular cycles, the due date may need adjustment based on ultrasound measurements.

Q4: What are the pregnancy trimesters?
A: First trimester: weeks 1-13, Second trimester: weeks 14-27, Third trimester: weeks 28-40+.

Q5: When should I see a healthcare provider?
A: Schedule your first prenatal appointment as soon as you suspect pregnancy, typically around 8 weeks from your LMP.