Free · Browser-Based · Pregnancy Planning

Due Date Calculator

Estimate due date, current gestational age, trimester, and milestone dates using last menstrual period or conception date as your starting point.

Calculation method

Reference date

Cycle length (days)

Today's date

Pregnancy summary

🎯 Common Use Cases

Estimate pregnancy due date

Check current gestational week

See trimester timing quickly

Review key milestone dates

Can I use conception date instead of LMP?

Yes. Switch the method to conception date for an alternate estimate.

Is this medical advice?

No. It is an estimate for planning and awareness, not a substitute for professional care.

What assumptions are used?

The calculator uses the common 280-day pregnancy estimate, adjusted by method and cycle length.