Pregnancy Calculator
Use this free pregnancy calculator to get instant results. Simply enter your data and get processed output immediately. Works entirely in your browser with no signup required.
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Pregnancy Calculator
Estimate Due Date based on LMP
Try Examples
How It Works
- Enter the First Day of your Last Menstrual Period (LMP).
- Adjust the average cycle length if different from 28 days.
- Click "Calculate Due Date".
- See your estimated delivery date and current progress.
Use Cases
- Planning for a new baby
- Scheduling prenatal appointments
- Tracking trimesters
- Sharing news with family
Frequently Asked Questions
How accurate is this?
It is a standard estimation (Naegele’s Rule). Only an ultrasound scan can confirm the exact dating.
What is a full term?
A full-term pregnancy usually lasts about 40 weeks (280 days) from the LMP.
Does cycle length matter?
Yes, longer cycles may mean a later due date because ovulation happened later.
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