Free Pregnancy Calculator
Calculate your due date, track trimesters, and see your full week-by-week pregnancy calendar instantly.
Calculate Your Due Date
Method 1: Last Menstrual Period (LMP)
Method 2: Conception Date
Method 3: Due Date
Method 4: IVF Transfer Date
Method 5: Ultrasound Date
weeks
days
Our free Pregnancy Calculator calculates your due date, current gestational age, trimester, and a complete week-by-week pregnancy calendar — all in one place. It supports five methods: Last Menstrual Period, Conception Date, Due Date, IVF Transfer, and Ultrasound. Pick the method that matches what you already know and get your results instantly.
How to Use This Calculator
1
Choose your calculation method from the five tabs — LMP, Conception Date, Due Date, IVF Transfer, or Ultrasound.
2
Enter the required date for your chosen method. For LMP, also select your average cycle length.
3
For IVF, select your embryo type — Day 3, Day 5, or Day 6 — along with your transfer date.
4
Click Calculate to instantly see your due date, current pregnancy status, trimester, and days remaining.
5
Scroll down to your personalized week-by-week calendar — your current week is highlighted automatically.
Which Calculation Method Is Right for You?
| Method | Use When | Accuracy |
|---|---|---|
| Last Menstrual Period | You know your last period date and have regular cycles | Good |
| Conception Date | You know the exact date you conceived | Good |
| Due Date | Your doctor has already given you an EDD | Good |
| IVF Transfer | You conceived through IVF and know your transfer date | Very Good |
| Ultrasound | You have early scan results with gestational age in weeks and days | Most Accurate |
Frequently Asked Questions
A full-term pregnancy is 40 weeks, measured from the first day of your last menstrual period. Babies born between 37 and 42 weeks are considered full term. The calculator marks week 37 onward as full term in the weekly calendar and highlights your current week automatically.
Yes. If your first-trimester ultrasound shows a gestational age that differs by more than 7 days from your LMP-based due date, your doctor will typically adjust the due date to match the ultrasound. Use the Ultrasound tab in this calculator to recalculate with your updated dating information.
For IVF pregnancies, the due date is calculated from the embryo transfer date rather than the last menstrual period. A Day 3 embryo transfer adds 263 days, a Day 5 blastocyst transfer adds 261 days, and a Day 6 transfer adds 260 days. Select your embryo type in the IVF tab and the calculator handles this automatically.
The orange highlighted row in the week-by-week calendar shows exactly which week of pregnancy you are in today. It automatically scrolls to your current week so you can instantly see your date range, trimester, and any key milestone associated with that week — such as a heartbeat becoming detectable or entering full term.
Want the Full Pregnancy Week by Week Guide?
Read our complete guide covering all three trimesters, key milestones from week 4 to week 40, IVF dating, and tips for every stage.