What is the most accurate method for calculating due date?

Ultrasound-based dating is generally the most accurate method, especially when performed in the first trimester. LMP is the most commonly used method, while conception dating requires knowing the exact conception date.

How accurate are due date calculations?

Due date calculations provide estimates only. Most babies are born within 2 weeks before or after the estimated due date. Always consult your healthcare provider for medical advice and accurate dating.

What is the LMP method?

LMP (Last Menstrual Period) is the most common method, calculating due date by adding 280 days (40 weeks) to the first day of your last menstrual period.

Should I rely solely on this calculator for medical decisions?

No, this calculator provides estimates only. Always consult your healthcare provider for medical advice, accurate dating, and pregnancy care. This tool is for informational purposes only.

Free Pregnancy Due Date Calculator - LMP, Conception & Ultrasound

📅 Calculate Due Date

LMP

Conception

Ultrasound

Last Menstrual Period (LMP) Date:

Average Cycle Length (days):

Conception/Ovulation Date:

Ultrasound Date:

Gestational Age at Ultrasound:

💡 How to Use

Choose your calculation method:

LMP: Most common method using your last menstrual period date
Conception: If you know when conception occurred
Ultrasound: Based on ultrasound measurements for most accuracy

Medical Disclaimer: This calculator provides estimates only. Always consult your healthcare provider for medical advice and accurate dating.

🤱 Pregnancy Due Date Calculator

📅 Calculate Due Date

💡 How to Use

📅 Due Date

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