Expect with confidence. Our due date calculator estimates your delivery date and provides your current gestational age in weeks and days, following standard clinical rules.
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Pregnancy Due Date Calculator - Delivery Estimator - FusioFiles
Estimate your baby's due date using Naegele's Rule and gestational age tracking. Fast, free, and 100% private. All processing happens locally.
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How to use Pregnancy Due Date Calculator
1
Input Last Period
Enter the start date of your last menstrual cycle.
2
Set Cycle Length
Customize the cycle length for better accuracy.
3
View Timeline
See your estimated due date and pregnancy milestones.
Key Features
Naegele's Rule
Calculates due date by adding 280 days to the LMP.
Trimester Timeline
Shows exactly which trimester you are currently in.
Gestational Age
Tells you how many weeks and days pregnant you are.
Countdown
Days remaining until your estimated delivery.
Frequently Asked Questions
Only about 4% of babies are born on their exact due date. It is an estimation window, usually +/- 2 weeks.
LMP stands for Last Menstrual Period. It is the starting point for most pregnancy calculations.
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