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.
Was Pregnancy Due Date Calculator useful?
Apa itu 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).
Cara menggunakannya
-
Pick the input mode
LMP (last menstrual period) or known conception date.
-
Pick the date
For LMP: the first day of your most recent period. For conception: the date of ovulation, IUI, or embryo transfer.
-
Read the result
See the due date, current week/day, trimester, and milestone dates.
Contoh
LMP on January 1
Standard 28-day cycle.
Hasil: Due date: October 8
Conception on February 14
Known timing.
Hasil: Due date: November 7 (266 days later)
Pertanyaan yang sering diajukan
Panduan terkait
Peralatan terkait
Kalkulator Usia
Hitung usia tepat dalam tahun, bulan, dan hari dari tanggal lahir mana pun. Gratis, di browser Anda, tanpa unggahan.
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.
Kalkulator BMI
Hitung Indeks Massa Tubuh Anda dari tinggi dan berat. Gratis, di browser Anda, tanpa unggahan.
Last reviewed: 2026-09-25