Pregnancy Due Date Calculator
Estimated due date from your last menstrual period with week-by-week trimester milestones.
- First trimester ends (week 12)Tue, 15 Sept 2026
- Anomaly scan window (week 18–20)Tue, 27 Oct 2026
- Quickening usually felt (week 16–20)Tue, 13 Oct 2026
- Viability milestone (week 24)Tue, 08 Dec 2026
- Third trimester begins (week 28)Tue, 05 Jan 2027
- Full term begins (week 37)Tue, 09 Mar 2027
- Due date (week 40)Tue, 30 Mar 2027
Naegele's rule (LMP + 280 days). Only a healthcare professional can confirm dates — this is an estimate.
About Pregnancy Due Date Calculator
Estimated due date from your last menstrual period with week-by-week trimester milestones.
Pregnancy Due Date Calculator applies the standard formula for this calculation and returns a clean, readable result — no spreadsheet setup or manual working required.
How to Use Pregnancy Due Date Calculator
- Enter your numbers in the input fields shown above.
- Choose any options (units, rounding, precision) if the tool offers them.
- The result updates automatically — no button needed.
- Copy the answer or reset the fields to start a new calculation.
Key Features
- Instant results with a clear, readable output format.
- Handles decimals, percentages and large numbers cleanly.
- Fast and private — every calculation runs on your device.
Frequently Asked Questions
What formula does Pregnancy Due Date Calculator use?
Pregnancy Due Date Calculator uses the standard, widely accepted formula for this calculation. Results are rounded only for display, so they are reliable for homework, planning and quick checks.
Is Pregnancy Due Date Calculator free to use?
Yes. Pregnancy Due Date Calculator is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Pregnancy Due Date Calculator runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Pregnancy Due Date Calculator work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.