FREE · CALCULATORS & CONVERTERS
Pregnancy Due Date Estimate.
Estimate an LMP-based due date with an explicit cycle-length adjustment.
How to use Pregnancy Due Date Estimate
Enter the relevant measurements or dates, select units and generate. Read the calculation method and limitations with the result.
How it works
Estimate an LMP-based due date with an explicit cycle-length adjustment. LMP estimate only. Ultrasound or IVF dating may supersede it; actual delivery date can differ. This calculator provides arithmetic or an educational estimate; it does not replace professional assessment.
Example
Generate the supplied illustrative inputs and review the assumptions.
Questions about Pregnancy Due Date Estimate
Is Pregnancy Due Date Estimate free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
LMP estimate only. Ultrasound or IVF dating may supersede it; actual delivery date can differ. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.