Due Date Calculator
Estimate your pregnancy due date using Naegele's rule. Enter your last menstrual period or conception date.Updated 2026-03-16
Frequently Asked Questions
Is this tool free to use?
Yes, completely free. All processing happens in your browser — no data is sent to any server.
Do I need to create an account?
No account or signup required. Just open the tool and start using it immediately.
Is my data safe?
Yes. Everything runs locally in your browser. Your data never leaves your device.
How to Use
- Fill in the required values above
- Click Calculate to see the breakdown
- Try different values to compare
- Adjust optional parameters for precision
FAQ
Can I compare different scenarios?
Adjust the inputs and recalculate to compare different scenarios side by side.
Are results suitable for professional use?
Provides accurate results based on standard formulas. For critical decisions, consult a professional.
How is the result calculated?
Uses standard mathematical formulas widely accepted in the field. The formula is shown with each result.
Does it show the work?
Yes, step-by-step breakdowns are provided so you can follow the calculation logic.
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