Free · Health · Pregnancy & Cycle
Pregnancy Calculator
Estimate due date, conception window, trimester dates, and current gestational age from the last menstrual period.
- Checked formula
- Private in your browser
- No signup
Result
Your calculation
- Estimated due date
- Sunday, November 8, 2026
- Estimated conception
- Sunday, February 15, 2026
- Second trimester begins
- Sunday, May 10, 2026
- Third trimester begins
- Sunday, August 16, 2026
- Estimated gestational age today
- 27 weeks, 3 days
Cycle dating is an estimate. A clinician may establish or revise the due date using early ultrasound and clinical history.
How to use this calculator
- Enter current measurements as accurately as practical.
- Calculate to see the estimate, range, and method details.
- Use the result as context, and discuss health decisions with a qualified clinician.
Use the result with context
Health results are educational estimates, not a diagnosis or treatment recommendation. A qualified clinician can interpret measurements in the context of your health.