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Pregnancy due date calculator

Estimate due date from last menstrual period with trimester milestones.

Recent results

Saved locally in your browser only.

Filter by type

No saved results yet. Run the tool to capture output here.

Free — no login

Processed in your browser — files are not uploaded.

Not medical advice

For educational planning only — not medical advice. Confirm dates with your care provider.

First day of last period (LMP)

Trimester 1

Estimated due date

May 9, 2027

Gestational age

12w 0d

LMP date

August 2, 2026

Milestone	Date
Estimated conception	August 16, 2026
Second trimester starts	November 1, 2026
Third trimester starts	February 14, 2027
Estimated due date	May 9, 2027

Frequently Asked Questions

LMP plus 280 days (40 weeks), a common clinical estimate.

No — for education only. Ultrasound dating from your provider is authoritative.

No — dates are processed only in your browser.

Calculators

Pregnancy due date calculator

Estimate due date from last menstrual period with trimester milestones.

Recent results

Saved locally in your browser only.

Filter by type

No saved results yet. Run the tool to capture output here.

Free — no login

Processed in your browser — files are not uploaded.

Not medical advice

For educational planning only — not medical advice. Confirm dates with your care provider.

First day of last period (LMP)

Trimester 1

Estimated due date

May 9, 2027

Gestational age

12w 0d

LMP date

August 2, 2026

Milestone	Date
Estimated conception	August 16, 2026
Second trimester starts	November 1, 2026
Third trimester starts	February 14, 2027
Estimated due date	May 9, 2027

Frequently Asked Questions

LMP plus 280 days (40 weeks), a common clinical estimate.

No — for education only. Ultrasound dating from your provider is authoritative.

No — dates are processed only in your browser.

Pregnancy due date calculator

Frequently Asked Questions

How is the due date calculated?

Is this medical advice?

Is data stored?

Pregnancy due date calculator

Frequently Asked Questions

How is the due date calculated?

Is this medical advice?

Is data stored?