Pregnancy Due Date Calculator
Calculate your estimated due date using Naegele's rule based on the first day of your last menstrual period (LMP). See your current gestational age, trimester, and key pregnancy milestones.
Inputs
Average menstrual cycle length
Results
Due Date
October 8, 2026
Current Week
19w 4d
Trimester
Second Trimester
Days Remaining
142
Pregnancy Milestones
| Week | Milestone | Date |
|---|---|---|
| 6 | Heartbeat detectable | February 12, 2026 |
| 12 | End of first trimester | March 26, 2026 |
| 20 | Anatomy scan / halfway | May 21, 2026 |
| 24 | Viability milestone | June 18, 2026 |
| 27 | Third trimester begins | July 9, 2026 |
| 37 | Early term | September 17, 2026 |
| 40 | Due date | October 8, 2026 |
Last updated: Reviewed by the CalcMountain editorial team
Frequently Asked Questions
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