Due Date Calculator
Naegele’s rule • Cycle Adjustment • Real‑time
Inputs
Pregnancy Report
Estimated Due Date
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Gestational Age
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Trimester
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Time Remaining
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Key Milestones
Due Date Calculator Guide
What is it & Why use it?
Easily calculate your pregnancy due date and track important milestones. This tool is helpful for expecting parents to plan pregnancy care, schedule checkups, and prepare for the baby’s arrival.
Example Calculation
Calculation based on a Last Menstrual Period (LMP) date of 1 Jan 2025:
Benefits & Use Cases
Track Timeline
Follow your pregnancy week-by-week and know which trimester you are in.
Prenatal Care
Schedule timely doctor visits, scans, and tests based on gestational age.
Preparation
Plan maternity leave, hospital bag packing, and nursery setup in advance.
Related Calculators on Calci.in
Frequently Asked Questions
Q1: How accurate is the due date?
It is an estimate. Only about 5% of babies are born on their exact due date; most arrive within a week of it.
Q2: Can I calculate due date without knowing LMP?
Yes. Ultrasound scans (dating scans) performed by a doctor can provide a very accurate estimate based on fetal size.
Q3: Is pregnancy always 40 weeks?
40 weeks is the average. A full-term pregnancy is considered anywhere between 37 and 42 weeks.
Q4: Why is due date important?
It helps doctors monitor fetal development milestones and schedule essential tests like the anomaly scan.