LMP Method with Cycle Adjustment

Due Date Calculator

Calculate your estimated due date using your last menstrual period. Adjusts for your actual cycle length — because not everyone has a 28-day cycle.

First Day of Last Period (LMP)

Average Cycle Length (days)

Data stays on your device

Medical Disclaimer: This calculator provides estimates only. Only ~5% of babies are born on their exact due date. Always confirm with your healthcare provider.