1. What is Weeks Pregnant Calculator?

This calculator estimates how many weeks pregnant you are based on your due date and current date. It works by calculating the time remaining until your due date and subtracting from the typical 40-week pregnancy duration.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Due Date — Expected date of delivery (typically 280 days from LMP)
• Current Date — Today's date or any date you want to check

Explanation: The calculation assumes a standard 40-week (280-day) pregnancy duration. The result shows how many weeks you've progressed in your pregnancy.

3. Importance of Pregnancy Dating

Details: Accurate pregnancy dating is crucial for proper prenatal care, timing of tests, and monitoring fetal development. It helps identify potential preterm labor or post-term pregnancies.

4. Using the Calculator

Tips: Enter your due date (from ultrasound or doctor) and the current date (defaults to today). The calculator will show how many weeks pregnant you are at that date.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculator?
A: It's accurate if your due date is correct. Early ultrasound dating is most precise (first trimester).

Q2: Why 40 weeks if pregnancy is 9 months?
A: Pregnancy is counted from last menstrual period (LMP), about 2 weeks before conception, making total 40 weeks.

Q3: What if my due date changes?
A: Update the calculator with your most recent due date from your healthcare provider.

Q4: Can I use this before knowing my due date?
A: No, you need an estimated due date from LMP or ultrasound for this calculator to work.

Q5: What's considered full term?
A: 37-42 weeks. Babies born before 37 weeks are preterm, after 42 weeks post-term.