How accurate is a pregnancy due date calculator?
About 5% of babies are born on their exact due date; most arrive within 2 weeks before or after.
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Free Pregnancy Due Date Calculator | 1ClickTools
Calculate pregnancy due date calculator instantly with Naegele's rule (LMP + 280 days). Features client-side privacy, instant formula breakdown, and.
Frequently Asked Questions
What is Naegele's rule?
Naegele's rule calculates due date by subtracting 3 months and adding 7 days to the first day of the last menstrual period.
How accurate is the Pregnancy Due Date Calculator?
All calculations are executed using standard mathematical algorithms directly in client-side JavaScript, ensuring double-precision floating-point accuracy without server-side rounding discrepancies.
Is my input data kept private when using the Pregnancy Due Date Calculator?
Yes. 1ClickTools operates 100% locally in your web browser session. No personal data, financial values, or calculation inputs are ever uploaded, saved, or transmitted to any external servers.
Can I use this tool for commercial or academic projects?
Yes. 1ClickTools provides 100% free access for personal, academic, professional, and commercial use without subscription fees or usage caps.