Pregnancy is an exciting period, and every expectant mother wants to know the exact dates. Online pregnancy calculators allow you to quickly calculate the due date (EDD), determine the term, and even predict the conception date.
How does the pregnancy calculator work?
Pregnancy calculator based on the last menstrual period is the most popular method. It uses Naegele's formula: 280 days (40 weeks) are added to the first day of the last menstruation. For example, if the period started on January 1, the estimated due date (EDD) would be October 8.
For accuracy, the following factors are taken into account:
- Menstrual cycle (if it is not 28 days, adjustments are needed).
- Ultrasound data (especially in the early stages).
- Conception date (if known).
Use the 2025 pregnancy calculator with updated algorithms for the most accurate calculation.
How to calculate EDD and pregnancy term?
- EDD calculator based on the last menstrual period - enter the first day of the last menstruation.
- Conception date calculator - relevant if you tracked ovulation.
- Pregnancy weeks calculator - shows the current term and key stages of the baby's development.
If the last menstrual period was on May 10, 2024, then:
- Due date based on the last menstrual period - February 16, 2025.
- Term on September 1, 2024 - 16 weeks.
Frequently Asked Questions
❓ How does the pregnancy calculator based on the last menstrual period work?
It adds 40 weeks to the first day of the last menstruation.
❓ Can you calculate EDD without a calculator?
Yes: "First day of menstruation + 7 days - 3 months". For example, April 5 → January 12.
❓ What is the difference with the 2025 pregnancy calculator?
It takes into account current medical standards and holidays for maternity leave calculations.
Conclusion
Online pregnancy calculator is an indispensable tool for expectant mothers. With its help, you will not only calculate the due date, but also be able to track the baby's development week by week.