TopToolAIPregnancy Due Date Calculator
Estimate your baby's due date based on the first day of your last menstrual period — a quick way to get a rough timeline alongside your doctor's official estimate. If the first day of the last period was 1 January 2026, the estimated due date comes out to roughly 8 October 2026, using the standard 280-day pregnancy estimate counted from that date.
How to use Pregnancy Due Date Calculator
Step-by-step guide to the boxes below. Open it only if you need help.
How to use Pregnancy Due Date Calculator
Step-by-step guide to the boxes below. Open it only if you need help.
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1
First day of last period Date
Pick the first day of your last period (the day bleeding started, not the day it ended). If you are unsure, use your best guess and confirm the date with your doctor.
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2
Press “Calculate Due Date”
Click the button under the boxes. If something is missing or not valid, a short message tells you which box to fix.
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3
Read your result
Your estimated due date appears, based on a standard 40-week pregnancy. Change any box and try again to compare different numbers.
Pregnancy Due Date Calculator FAQs
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