Pregnancy Due Date Calculator - Pregnancy Calendar
| Today | First day | Due date | You are currently at | Remainig days |
|---|---|---|---|---|
| 2025-04-26 | Apr. 26, 2025 | Jan. 31, 2026 | 0days (0 weeks + 0 days) | 280 days |
Note: Baby birth dates will vary based upon many factors individual to the parents. The results of this calculator are estimations based on averages for single pregnancy. The results for twin pregnancy or multiple pregnancy are different.
What is my due date?
Your due date, also known as your estimated date of delivery, is the approximate date your labor might begin. Your estimated due date is commonly calculated by adding 280 days (40 weeks) to the date of the first day of your last period, using Naegele’s rule. This may vary if you have irregular periods.
How far along am I?
To calculate how many weeks pregnant you are, our pregnancy calculator looks at the first day of your last menstrual period (LMP) and compares it to today's date. The first day of your LMP counts as the first day of your pregnancy. This calculation is based upon an average cycle of 28 days. If your cycle is different to 28 days, your calculation will vary based upon this.You will find that the sonographer at your first ultrasound scan (often called the dating scan) will give you a more accurate idea of how many weeks pregnant you are by measuring your baby from its head to its bottom to form a determination.
If you want to calculate an estimated due date manually using Naegele’s rule, here's how to do it:
Find out the first day of your last menstrual period
Subtract 3 months from that date
Add 1 year and 7 days
First day of last period:
11/27/2024 12/7/2024 12/17/2024 12/27/2024 1/6/2025 1/16/2025 1/26/2025 2/5/2025 2/15/2025 2/25/2025 3/7/2025 3/17/2025 3/27/2025 4/6/2025 4/16/2025 4/26/2025