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Pregnancy Date Calculators

Due Date Calculator

Estimated due date from your last menstrual period or conception date, using Naegele’s rule.

Enter values

Results update as you type.

Result

Estimated due date

Friday, April 30, 2027

Current gestational age
8 weeks 4 days
Days to go
220
Estimated conception
Friday, August 7, 2026
Trimester
First

Informational date tool only — your healthcare provider’s dating scan is more accurate.

About the Due Date Calculator

Estimated due date from your last menstrual period or conception date, using Naegele’s rule.

Also known as: pregnancy due date, edd calculator, when is my baby due, estimated delivery date, pregnancy countdown.

How to use this calculator

  1. Enter calculate from, date.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

Naegele's rule: due date = LMP + 280 days (adjusted for cycle length)

Worked example

Using the values pre-filled in the calculator above:

  • Calculate from: Last menstrual period
  • Date: 2026-07-24
  • Average cycle length = 28 days

the calculator returns:

  • Estimated due date: Friday, April 30, 2027
  • Current gestational age: 8 weeks 4 days
  • Days to go: 220
  • Estimated conception: Friday, August 7, 2026