This calculator is part of the health section. Keep the current tool open for calculation, then use the related calculators below to compare nearby planning tasks.
Health calculator
Use a fuller due-date calculator when you want the expected delivery date and milestone timeline from whichever pregnancy reference point you know best.
How to use this calculator
Due-date estimation can begin from conception, last menstrual period, ultrasound dating, or IVF transfer details. The reference due-date calculator supports those separate paths, and this version adapts the same structure into one live page that keeps the final due date and milestone timeline together.
Formula / method
This due date calculator uses the existing ToolModule calculation model for the inputs shown above. The page keeps the original formulas and result logic intact, then presents the output in a clearer working layout.
Example calculation
The example below reflects the current values shown in the calculator above, so it updates as you change the form without altering the calculation logic itself.
Disclaimer
Results are for reference only and do not constitute medical, nutrition, or clinical advice. Use professional guidance when a health or treatment decision is involved.
FAQ
A standard estimate is about 266 days from conception and about 280 days from the last menstrual period.
Ultrasound-based gestational age can refine the pregnancy timeline when cycle timing is uncertain or ovulation did not happen exactly when expected.
The reference design leans on calculate-then-view flows. This version keeps the chosen reference, due date, and milestone schedule visible together so the timeline is easier to review.