Pregnancy Due Date Calculator – Estimate Your Baby's Due Date

First day of last period

Average cycle length (days)

Estimated conception date

Not sure of the exact date? Use your best estimate, or switch to the "By Last Period" tab instead.

Your due date (from a doctor or ultrasound)

We'll work backward to estimate your likely conception date and last period date.

Please enter a valid date.

Calculating…

Estimated Due Date

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Estimated Conception Date–

Estimated Last Period Date–

Current Week & Day–

Days Until Due Date–

Trimester Breakdown

1st

Trimester

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2nd

Trimester

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3rd

Trimester

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Pregnancy Due Date Calculator – Find Your Due Date, Week & Trimester