Pregnancy Due Date Calculator
Estimate your due date based on last menstrual period (LMP) or conception date. See current pregnancy week and trimester. All calculations run in your browser—no data sent. This is not medical advice; confirm with your healthcare provider.
This tool is for estimation only. Always confirm with your healthcare provider. Not medical advice.
Important disclaimer
This calculator is for estimation and educational purposes only. It is not medical advice. Your actual due date may be adjusted by your doctor or midwife based on ultrasound and clinical assessment. Always follow the guidance of your healthcare provider.
Why use this calculator?
- 100% browser-based — no data stored or sent
- LMP, conception, and IVF transfer options
- Instant results
- Free, no signup, no ads
What is a pregnancy due date calculator?
A pregnancy due date calculator estimates your expected delivery date (EDD) from the first day of your last menstrual period (LMP), your conception date, or an IVF embryo transfer date. Use it as a pregnancy week calculator online to see how far along you are. The LMP method can use a default 28-day cycle or your average cycle length for a more accurate estimate. This is a private due date calculator and simple pregnancy calculator free to use—a browser pregnancy calculator that runs entirely on your device. No data is sent or stored.
Wondering how far pregnant am I? Enter your dates and the tool shows your current week, trimester, and approximate days until your due date. This tool is for planning and education only. Your healthcare provider will confirm or adjust your due date using ultrasound and clinical assessment.
Frequently asked questions
How is the due date calculated from LMP?
We add 280 days (40 weeks) to the first day of your last menstrual period for a 28-day cycle. You can enter your average cycle length; we then estimate ovulation as LMP + (cycle length − 14) and add 266 days from that date. Your doctor may adjust based on early ultrasound.
What if I know my conception date?
Select "Conception date" and enter that date. We add 266 days (38 weeks) to get the estimated due date.
What about IVF?
Select "IVF embryo transfer" and enter your transfer date. For a 3-day embryo we add 263 days; for a 5-day embryo we add 261 days.
What are the trimesters?
First trimester is weeks 1–12, second weeks 13–26, third weeks 27–40. The calculator highlights your current trimester.
Is this a substitute for medical advice?
No. This tool is for estimation only. Always confirm your due date and care with your doctor or midwife.
Related Tools
Explore these related free tools to enhance your productivity and workflow.