Pregnancy
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June 6, 2026
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Pregnancy
Gentler planning for pregnancy
Due Date Calculator
Due Date Calculator gives an estimated due date and a quick pregnancy timeline you can use for planning and education.
Updated 2026-06-06 3 article sections Calculator, explanation, and FAQ
What you get
A result, a short explanation, and links to related tools.
Best for
Timing and pregnancy planning
Tip
Use the calculator first, then read below if you want more context.
Calculator
Try Due Date Calculator
Enter your details to get an estimate, then read the notes below for context.
Fast estimate Clear result notes No sign-up needed
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Due Date Calculator
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Enter your details
Most people finish this in under a minute.
Result
Quick interpretationWaiting for input
Enter your details and click calculate.
This panel shows the main result first, followed by any extra details that matter.
Primary signal
Your main number or category will appear here after calculation.
What to look at next
Check the range, category, or comparison details instead of relying on one number alone.
Estimate scale
EstimateFocused view
Some calculators also show a visual summary here after calculation.
Step 1
Start with the main number, then check the range or category around it.
Step 2
Use the sections below if you want formulas, ranges, or related tools.
Notes to keep in mind
Guide
How Due Dates Are Estimated
Gentler planning for pregnancy
A typical pregnancy is estimated as 40 weeks from the first day of the last menstrual period. This is why due dates are best viewed as approximations, not promises.
Guide
Due Date Formula
Gentler planning for pregnancy
If you choose last menstrual period, the calculator adds 280 days. If you choose conception date, it adds 266 days.
Guide
What to Expect Next
Gentler planning for pregnancy
Use the estimated due date as a planning guide, then confirm with a prenatal care provider for more precise dating.
Common questions
Answers to common follow-up questions about due date calculator.
How accurate is a due date calculator?
It is a helpful estimate, but actual delivery dates vary widely. Ultrasound dating and clinical guidance are more precise.