Due Date Calculator
Free Pregnancy Due Date Calculator - Track Your Pregnancy
Enter your last menstrual period or conception date to calculate your due date, current pregnancy week, trimester, and key milestones.
💡 What is Due Date Calculation?
Due date is calculated using Naegele's rule: add 280 days (40 weeks) from the first day of the last menstrual period (LMP). From conception date, add 266 days (38 weeks). Most births occur within 2 weeks of the estimated due date.
📝 How to Use
- Choose between Last Menstrual Period or Conception Date mode
- Enter the date
- Due date and current pregnancy week are calculated automatically
- Review progress and key milestones
🔧 Pregnancy Tips
- Confirm exact due date with ultrasound
- Delivery within 2 weeks of due date is normal
- Folic acid is especially important in the first trimester
- Attend regular prenatal checkups
- Light exercise during pregnancy is beneficial
📚 Local Method & Assumption Guide
Formula Logic
Core formulas use public finance, loan, ratio, and unit conversion standards.
Source Scope
References follow publicly available standards and country-level common practices.
Assumptions
Taxes, fees, rates, and limits vary by region and institution.
Result Interpretation
Use this result as a baseline scenario. For decisions, compare with your lender quote and local tax treatment.
Locale Preset
Currency: USD
Units: imperial
Tax logic: US payroll estimate
Regulatory Note
This tool uses regional presets for estimation. Contract terms and legal limits may differ by lender, bank, or local law.
Recommended Next Actions
- Compare at least 2-3 local providers before final submission.
- Re-check fees, tax treatment, and prepayment clauses in writing.
- Run a stress scenario with +1-2% interest and lower income.
Before a real financial decision, confirm with local institution rules.