Utility
Conception Date Calculator
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Estimate the conception date and window from a due date, last period or birth date, adjusted for cycle length. Educational only.
Conception usually occurs around ovulation, ~14 days before the next period (adjusted for cycle length). Estimates carry a window of several days. Educational only — not medical advice.
Privacy & Security
Runs entirely in your browser. No data is sent to any server.
Data: None
Client-side-Side
Active
v1.0
How to Use
Choose what you know (due date, LMP or birth date), pick the date and your cycle length to see the estimated conception window.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.