Pregnancy Due Date Calculator
Worked example result
| Estimated due date | October 8, 2026 |
| Gestational age on the 'today' date | 12 weeks, 0 days |
| Trimester | First trimester |
An LMP of January 1, 2026 gives a due date of October 8, 2026. On March 26, 2026 the pregnancy is 12 weeks, 0 days along — first trimester.
Due date = LMP + 280 days (Naegele's rule) · Gestational age = today − LMP · Powered by CalcHub — Pregnancy Due Date Calculator