Pregnancy Due Date Calculator — Two ways to estimate a due date. The default is Naegele's rule: due date = first day of last period + 280 days (40 weeks). This works if your cycles are roughly 28 days. If you know the conception date (IVF transfer, known ovulation, IUI), use that mode — it adds 266 days instead.
Your dates never leave the browser.
Dates are estimates for general information only, not medical advice. Only a clinician's ultrasound-based dating is reliable. Contact your healthcare provider for anything concerning your pregnancy.
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ما هو Pregnancy Due Date Calculator؟
Two ways to estimate a due date. The default is Naegele's rule: due date = first day of last period + 280 days (40 weeks). This works if your cycles are roughly 28 days. If you know the conception date (IVF transfer, known ovulation, IUI), use that mode — it adds 266 days instead.
The calculator shows the current week and day, which trimester you're in, days until the due date, and the key milestone dates (heartbeat detectable at 7 weeks, anatomy scan at 20 weeks, viability at 24 weeks, full term at 37 weeks).
كيفية الاستخدام
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Pick the input mode
LMP (last menstrual period) or known conception date.
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Pick the date
For LMP: the first day of your most recent period. For conception: the date of ovulation, IUI, or embryo transfer.
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Read the result
See the due date, current week/day, trimester, and milestone dates.
أمثلة
LMP on January 1
Standard 28-day cycle.
النتيجة: Due date: October 8
Conception on February 14
Known timing.
النتيجة: Due date: November 7 (266 days later)
الأسئلة الشائعة
أدلة ذات صلة
أدوات ذات صلة
حاسبة العمر
احسب العمر بدقة بالسنوات والأشهر والأيام من أي تاريخ ميلاد. مجاني، في متصفحك، بدون رفع.
Date Calculator
Count the days between two dates, or add and subtract days from any date.
Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from any date. Handles month-end and leap-year rollovers.
حاسبة مؤشر كتلة الجسم
احسب مؤشر كتلة جسمك من الطول والوزن. مجاني، في متصفحك، بدون رفع.
Last reviewed: 2026-09-25