Free Due Date Calculator Online
Calculate your pregnancy due date, estimated delivery date, gestational age, conception date, pregnancy week, trimester, and important pregnancy milestones with this free due date calculator.
🤰 Due Date Calculator
Live Delivery Date EstimatePregnancy Inputs
Left SidePregnancy Results
Right SidePregnancy Progress Pie Chart
| Milestone | Estimated Date | Pregnancy Week |
|---|
A due date is an estimate, not an exact delivery date.
Last period, conception, due date, and ultrasound methods can differ.
Confirm pregnancy dates and health questions with a qualified clinician.
What Is a Due Date Calculator?
A due date calculator estimates pregnancy due date, estimated delivery date, gestational age, pregnancy week, trimester, conception date, days remaining, pregnancy progress, and important pregnancy milestones. It can calculate dates from last menstrual period, conception date, IVF transfer date, ultrasound dating, or known due date.
This free online pregnancy due date estimator is useful for planning appointments, understanding pregnancy weeks, reviewing trimester dates, and creating an estimated pregnancy timeline. It provides general date estimates only.
Pregnancy Due Date Calculator
Estimate expected delivery date from LMP, conception, IVF, ultrasound, or known due date.
Gestational Age Calculator
Calculate pregnancy age in completed weeks and days for a selected check date.
Pregnancy Week Calculator
See current pregnancy week, trimester, and days remaining until due date.
Pregnancy Timeline
Generate estimated milestone dates and export the timeline as a CSV file.
How Due Date Calculation Works
A common due date method adds 280 days to the first day of the last menstrual period. Conception-based estimates add about 266 days to the estimated conception date. IVF and ultrasound methods use the provided medical dating information to estimate the pregnancy start date and due date.
Due Date Calculator Formula
The calculator also estimates gestational age by comparing the selected check date with the estimated pregnancy start date.
Gestational Age vs Due Date
Gestational age is the estimated pregnancy age in weeks and days. Due date is the estimated delivery date. Pregnancy week is often shown as the next labeled week after completed weeks have passed.
Due Date Calculator Examples
Enter the first day of the last menstrual period to estimate due date.
Enter estimated conception date to calculate estimated delivery date.
Use transfer date or ultrasound age to estimate pregnancy timeline.
Benefits of Using a Due Date Calculator
Estimate important pregnancy dates for personal planning.
Understand gestational age, pregnancy week, and trimester.
Download an estimated pregnancy timeline as a CSV file.
Pregnancy Date Planning Tips
- Use due date results as estimates rather than exact delivery dates.
- Keep track of which dating method you used.
- Confirm important pregnancy dates with a qualified clinician.
- Seek medical care promptly for urgent symptoms or concerns.
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Frequently Asked Questions
Is this due date calculator free?
Yes. You can estimate due date, gestational age, pregnancy week, trimester, and milestones for free.
How is a due date calculated?
A common method adds 280 days to the first day of the last menstrual period.
What is the LMP method?
The LMP method uses the first day of the last menstrual period to estimate due date.
Can I calculate due date from conception date?
Yes. The calculator can estimate due date by adding about 266 days to conception date.
Can IVF transfer date estimate due date?
Yes. The calculator supports 3-day and 5-day IVF transfer date estimates.
What is gestational age?
Gestational age is the estimated pregnancy age, usually shown in weeks and days.
Are due dates exact?
No. Due dates are estimates and actual delivery dates can vary.
Can I export the pregnancy timeline?
Yes. Use the Download CSV button to export estimated pregnancy milestones.