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How Many Weeks Pregnant Calculator

This calculator helps you determine how many weeks pregnant you are based on the date of your last menstrual period (LMP). It also estimates your due date and shows how many weeks and days remain until delivery. Pregnancy typically lasts between 37 and 42 weeks, and knowing your current gestational age helps track important milestones.

Pregnancy Week, Due Date & Countdown Calculator

Input Fields

Pregnancy Week and Due Date Formula

Formula
$$\text{Gestational Age (weeks)} = \frac{\text{Current Date} – \text{LMP}}{7}$$ $$\text{Due Date} = \text{LMP} + 280\ \text{days}$$

Pregnancy duration is typically counted from the first day of your last menstrual period. This method assumes ovulation and conception occurred about two weeks later.

The “How Many Weeks Pregnant” calculator is ideal for expectant mothers to determine current pregnancy progress. By simply entering the first day of your last period, the calculator reveals your gestational age in weeks and days, the estimated due date, and the remaining time until birth. It’s especially useful for scheduling checkups, tracking trimester progress, and preparing for the baby’s arrival. This method is widely used in obstetrics and gives reliable results early in pregnancy.

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