Pregnancy Due Date Calculator Online Free
Estimate your pregnancy due date, current week, trimester and important milestone dates. Calculate by last period, conception date, IVF transfer date or ultrasound estimate.
Pregnancy Details
Estimated Results
Pregnancy Progress
How to Use the Pregnancy Due Date Calculator
Estimate pregnancy dates in three simple steps.
1. Choose method
Select last period, conception date, IVF transfer date or ultrasound dating.
2. Enter your date
Add the date information you have and adjust cycle length if needed.
3. View results
See estimated due date, pregnancy week, trimester and milestone dates.
Estimate your pregnancy timeline with clarity.
This Pregnancy Due Date Calculator helps estimate key pregnancy dates based on common dating methods, including last menstrual period, conception date, IVF transfer date and ultrasound dating.
It can help you plan appointments, track current pregnancy week, understand trimester timing and review important milestone dates.
What is a pregnancy due date calculator?
A pregnancy due date calculator estimates the expected delivery date using date information such as the first day of the last menstrual period, conception date, IVF transfer date or ultrasound gestational age.
The result is only an estimate. A healthcare provider can confirm pregnancy dating using clinical information and ultrasound.
When should you use it?
- Estimating an expected due date
- Checking current pregnancy week and days
- Understanding trimester timing
- Planning prenatal appointments
- Reviewing common pregnancy milestone dates
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Pregnancy Due Date Calculator FAQ
Common questions about pregnancy due date estimates.
How is pregnancy due date calculated?
A common estimate is 280 days from the first day of the last menstrual period, based on a 40-week pregnancy.
Can I calculate due date from conception date?
Yes. If you know the estimated conception date, the calculator adds about 266 days to estimate the due date.
Can IVF due date be calculated?
Yes. This tool supports 3-day and 5-day embryo transfer dates.
Is the due date exact?
No. It is an estimate. Only a small percentage of babies are born exactly on the due date, and your healthcare provider can give the best guidance.
What is LMP?
LMP means last menstrual period. It refers to the first day of the last period and is commonly used to estimate pregnancy dating.
What is a trimester?
A trimester is one of three pregnancy stages: first trimester, second trimester and third trimester.
Can ultrasound change the due date?
Yes. Healthcare providers may adjust the estimated due date based on ultrasound measurements and clinical information.
Does it work on mobile?
Yes. This pregnancy due date calculator works on desktop, tablet and mobile browsers.