Pregnancy Due Date Calculator – Estimate Baby Due Date & Pregnancy Week
Use this pregnancy due date calculator to estimate your baby’s due date, current pregnancy week, trimester, days pregnant, and important pregnancy milestones. This baby due date calculator supports LMP, conception date, ovulation date, IVF transfer date, and ultrasound dating.
Pregnancy Due Date Calculator
Choose a calculation method and enter your date details. This estimated due date calculator will show your pregnancy timeline instantly.
What You Will See
After calculation, your result will include:
- Estimated due date
- Current pregnancy week and day
- Current trimester
- Days pregnant and days left
- Estimated conception date
- Pregnancy progress percentage
- Pregnancy milestone timeline
- Pregnancy weeks-to-months chart
Your Pregnancy Due Date Result
Pregnancy Milestone Timeline
9-Month Pregnancy Calendar
This pregnancy calendar shows your estimated 9-month timeline with important pregnancy milestones marked on their approximate dates.
Pregnancy Weeks to Months Chart
What Is a Pregnancy Due Date Calculator?
A pregnancy due date calculator estimates when your baby may arrive. This tool can work as a baby due date calculator, pregnancy week calculator, estimated due date calculator, conception date calculator, pregnancy trimester calculator, and due date calculator by LMP. You can calculate your pregnancy calendar using your last menstrual period, conception date, ovulation date, IVF transfer date, or ultrasound date.
How Is a Pregnancy Due Date Calculated?
Pregnancy is commonly estimated as 40 weeks, or 280 days, from the first day of the last menstrual period. When using conception date or ovulation date, the estimate usually adds about 266 days because conception generally happens about two weeks after the start of the menstrual cycle.
How Far Along Am I?
Many people search for “how far along am I” because they want to understand their current pregnancy week, trimester, days pregnant, and days left until the due date. This calculator uses today’s date and your estimated due date to show an approximate pregnancy timeline.
Due Date by Last Period
The due date by last period method uses the first day of your last menstrual period. This due date calculator by LMP also allows you to enter your average cycle length because a shorter or longer cycle can slightly change the estimate.
IVF Due Date Calculator
An IVF due date calculator uses the embryo transfer date and embryo age. A 3-day embryo transfer and a 5-day embryo transfer use slightly different formulas because the embryo is at a different development stage on transfer day.
Can My Due Date Change?
Yes. Your OB-GYN, midwife, or doctor may update your estimated due date after an early ultrasound or medical evaluation. Due dates are helpful estimates, but prenatal care is the best way to confirm your pregnancy timeline.
Pregnancy Trimester Guide
A pregnancy trimester calculator helps divide pregnancy into three major stages:
- First trimester: weeks 1–13
- Second trimester: weeks 14–27
- Third trimester: week 28 until birth
Pregnancy Appointment Checklist
- First prenatal visit
- Dating ultrasound
- Genetic screening discussion
- Anatomy scan around weeks 18–22
- Glucose screening around weeks 24–28
- Group B strep screening around weeks 36–37
- Birth plan and hospital bag preparation
When to Contact a Healthcare Provider
Contact a doctor, OB-GYN, midwife, or emergency care if you have severe pain, heavy bleeding, fainting, fever, unusual symptoms, or any concerns about your pregnancy. This calculator does not provide a medical diagnosis.
Pregnancy Due Date Calculator FAQs
How accurate is a pregnancy due date calculator?
A pregnancy due date calculator gives an estimate based on the date information you enter. Many pregnancies do not deliver exactly on the estimated due date, so your healthcare provider may confirm or adjust your timeline.
What is the most common way to calculate a due date?
The most common method is using the first day of the last menstrual period, also called LMP. A standard estimate adds 280 days to the first day of the last period.
What does LMP mean in pregnancy?
LMP means last menstrual period. In pregnancy dating, it usually refers to the first day of your last period.
Can I calculate my due date from conception date?
Yes. A conception date calculator usually estimates the due date by adding about 266 days to the conception date.
How do I calculate my due date after IVF?
For IVF, the due date depends on the embryo transfer date and embryo age. This calculator supports both 3-day and 5-day embryo transfer estimates.
What trimester am I in?
The first trimester is weeks 1 through 13, the second trimester is weeks 14 through 27, and the third trimester starts at week 28.
Can my doctor change my due date?
Yes. A doctor, OB-GYN, or midwife may update your estimated due date based on early ultrasound measurements or other medical information.
Is a due date calculator medical advice?
No. This calculator is for educational purposes only and should not replace medical advice, diagnosis, prenatal care, or guidance from a licensed healthcare provider.
How many weeks is pregnancy?
Pregnancy is commonly estimated as 40 weeks from the first day of the last menstrual period.
What is the difference between gestational age and fetal age?
Gestational age is usually counted from the first day of the last menstrual period. Fetal age is usually counted from conception and is about two weeks shorter.
