Pregnancy Due Date Calculator using Naegele’s Rule

 

Pregnancy Due Date Calculator

Based on Naegele's Rule - LMP + 280 days

First Day of Last Menstrual Period (LMP) Cycle Length 21 days 22 days 23 days 24 days 25 days 26 days 27 days 28 days - Average 29 days 30 days 31 days 32 days 33 days 34 days 35 days

Estimated Due Date

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Conception Date: -

Current Gestation: -

Days Until Due Date: -

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Note: Naegele's Rule assumes 28-day cycles and ovulation on day 14. Only ~5% deliver exactly on their due date. Most babies arrive between 37-42 weeks. Always confirm with your doctor/ultrasound.