Due Date Calculator
Estimated due date from LMP with cycle adjustment.
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Estimated due date
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Today you are
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Days remaining
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Trimester
Naegele’s rule: 280 days from the LMP, shifted by your cycle length vs the standard 28. Dating scans can move the estimate a week or two either way — the scan result is the one clinicians trust most.
使い方
- すべてブラウザ内でローカルに動作します。データは送信されず、アカウントも不要です。
概要
Standard Naegele’s rule (280 days from the first day of the last period) adjusted for your cycle length, and shows the current gestational week and trimester.
Only the baby knows the real date — first pregnancies average about 4 days past this estimate, so treat it as a window, not an appointment.
すべてブラウザ内でローカルに動作します。データは送信されず、アカウントも不要です。
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