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Pregnancy Week Calculator

See the week of pregnancy, the estimated due date and the baby's average length and weight each week.

Gestational age

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Trimester

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EDD

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Remaining

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01

Timeline Baseline

Input mode
LMP
Average cycle (days)
Next appointment

02

Main Summary

Estimates use Naegele's rule and IOM weight-gain guidelines based on pre-pregnancy BMI. NOT a substitute for prenatal care, ultrasound dating or clinical assessment. Always follow your obstetrician's guidance — every pregnancy is unique.

Enter the LMP.

03

Clinical Windows

Enter the timeline baseline to view windows.

04

Weekly Panel

Enter the timeline baseline to view the weekly guide.

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