| Estimated Due Date | hesaplanacak |
|---|---|
| Current Week | hesaplanacak |
| Trimester | hesaplanacak |
| Days Until Due Date | hesaplanacak |
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How Is a Due Date Calculated?
A full-term pregnancy is approximately 40 weeks (280 days) from the first day of the last menstrual period (LMP). This is known as Naegele's rule — the standard method used by most healthcare providers worldwide.
Naegele's Rule
Estimated Due Date (EDD) = Last Menstrual Period + 280 days
Alternatively: EDD = LMP + 9 months + 7 days
Example: LMP = January 1 → EDD = October 8
Pregnancy Trimesters
| Trimester | Weeks | Key Developments |
|---|---|---|
| First trimester | 1–12 | Organ formation, morning sickness common |
| Second trimester | 13–26 | Movement felt, anatomy scan at 20 weeks |
| Third trimester | 27–40 | Rapid growth, preparation for birth |
Important Notes
- Only 4% of babies are born on their exact due date.
- A normal delivery window is 37–42 weeks.
- Ultrasound dating (especially at 8–12 weeks) is more accurate than LMP for irregular cycles.
- Always confirm your due date with your healthcare provider.
If Your Cycle Is Not 28 Days
Naegele's rule assumes a standard 28-day cycle. If your cycle is shorter or longer, ovulation and conception shift accordingly. Some calculators allow cycle length adjustment for a more personalized estimate.
How to Use This Calculator
Using our calculator is simple: enter the required values into the input fields and click the calculate button. Results are displayed instantly on screen. You can adjust the values and recalculate to compare different scenarios and find the best option for your situation.
Frequently Asked Questions
| Question | Answer |
|---|---|
| How accurate are the results? | We use standard formulas and up-to-date 2025 rates. Individual circumstances may vary slightly. |
| Is this calculator free? | Yes, completely free and no registration required. |
| What should I do for exact figures? | For precise information, consult a relevant professional or official authority. |
| Does it work on mobile devices? | Yes, it works seamlessly on all devices and screen sizes. |
Important Notes
This calculator is provided for informational purposes only. For legal, financial, or medical decisions, always seek advice from qualified professionals. Calculation results do not constitute official documents. Legislative changes may affect results; please visit the relevant official website for the most up-to-date information. Our calculators are regularly updated to reflect current regulations and rates.
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