1. What is the Weeks Pregnant Calculator?

The Weeks Pregnant Calculator estimates pregnancy duration in weeks based on the conception date. It calculates the time elapsed since conception to determine current gestational age.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( WP \) — Weeks pregnant (weeks)
• \( CD \) — Current date (date)
• \( CPD \) — Conception date (date)
• \( \lfloor \rfloor \) — Floor function (rounds down to nearest integer)

Explanation: The formula calculates the number of full weeks that have passed since conception by dividing the total days by 7 and rounding down to the nearest whole number.

3. Importance of Pregnancy Dating

Details: Accurate pregnancy dating is crucial for monitoring fetal development, scheduling prenatal tests, determining due dates, and ensuring appropriate medical care throughout pregnancy.

4. Using the Calculator

Tips: Enter the conception date and current date. The calculator will determine how many complete weeks have passed since conception. Both dates must be valid with current date after conception date.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between gestational age and fetal age?
A: Gestational age is typically calculated from the first day of the last menstrual period (LMP), while this calculator uses conception date for more precise fetal age calculation.

Q2: How accurate is conception date calculation?
A: Conception date is most accurate when known from fertility tracking, ovulation tests, or assisted reproductive technology. Otherwise, it's estimated based on LMP.

Q3: Why use floor function instead of rounding?
A: The floor function ensures you're counting only complete weeks. For example, 6 weeks and 6 days is still considered 6 weeks pregnant.

Q4: When should I see a healthcare provider?
A: Contact a healthcare provider as soon as you suspect pregnancy for confirmation and to begin prenatal care, regardless of calculated weeks.

Q5: Can this calculator predict due date?
A: While it calculates current weeks pregnant, due date is typically estimated as 40 weeks from the first day of the last menstrual period or 38 weeks from conception.