Results are approximate and based on a typical 28-day cycle. Always consult a healthcare provider for precise dating and medical advice.
This due date calculator can estimate a baby's due date from either the last menstrual period (LMP) or the conception date. It uses the typical 280-day or 266-day gestation assumptions.
Due dates are always estimates. Many pregnancies naturally go a little longer or shorter, and only a healthcare provider can provide accurate clinical dating based on ultrasound and other information.
Enter your information in the fields above, run the calculation, and review the result to understand what it means for your situation.
Look at the output in the context of your overall goals rather than in isolation. Consider how sensitive the result is to changes in your inputs (for example, adjusting the amount, rate, or time) to understand which factors matter most.
This tool is a simplified model and does not capture every nuance of real life. Treat it as a planning aid, not a guarantee. For important financial or health decisions, combine these results with professional advice and more detailed analysis.