LMP Calculator
Calculate your pregnancy timeline and important dates
Enter Your Last Menstrual Period Date
Your Pregnancy Timeline
Conception Date (Estimated):
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Current Gestational Age:
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Expected Due Date:
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Current Trimester:
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Weeks Until Due Date:
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About LMP Dating
The Last Menstrual Period (LMP) method is the most commonly used way to calculate pregnancy dates. This calculator uses the standard 280-day (40-week) pregnancy length from the first day of your last menstrual period.
Important Notes:
• This calculator provides estimates based on a regular 28-day cycle
• Individual pregnancy lengths may vary
• Always consult with your healthcare provider for accurate dating
• Ultrasound measurements may provide more precise dating
Recommended Scans:
• 6-8 weeks: Early pregnancy viability scan
• 11-14 weeks: NT scan (nuchal translucency)
• 18-22 weeks: Detailed anomaly scan
• 28-32 weeks: Growth scan (if indicated)