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Pregnancy Calculator
Due Date & Week Calculator
How it works: Enter the first day of your last menstrual period (LMP). The calculator adds 280 days (40 weeks) using Naegele's Rule and shows your current week, estimated due date (EDD), trimester, and milestones.
📅 Estimated Due Date
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📊 Current Week
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🔄 Trimester
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👶 Fetal Age
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from conception
📊 Progress
First Trimester
Weeks 1-13
Second Trimester
Weeks 14-27
Third Trimester
Weeks 28-40
🏥 Key Milestones
⚠️ Disclaimer: This calculator is for informational purposes only and does not replace medical advice. Always consult your healthcare provider.
FAQ
How is the due date calculated?
The due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP), using Naegele's Rule.
How long is a pregnancy?
Pregnancy lasts about 40 weeks (280 days) from the LMP. Normal delivery occurs between weeks 37-42.
What is EDD?
EDD = Estimated Due Date. Calculated as 280 days from the first day of your last menstrual period.
Is this calculator accurate?
It's based on Naegele's Rule and gives a good estimate. Early ultrasound is more accurate, especially with irregular cycles.