Global Araç
Pregnancy Calculator
Estimated due date
February 15, 2027
Current progress
0w 0d
Trimester
1st trimester
Conception (est.)
May 25, 2026
How it works
- Due date = LMP + 280 days (Naegele's rule).
- Conception is estimated at LMP + 14 days (assumes a 28-day cycle).
- Trimesters: 1st = weeks 1–12, 2nd = 13–26, 3rd = 27–40.
Estimates only — your provider's dating ultrasound is more accurate.
Estimate your due date, current week of pregnancy, and trimester from either the first day of your last menstrual period (LMP) or a known conception date. Uses the standard Naegele's rule of LMP + 280 days, the same formula most practitioners and apps use for a first-look estimate.
This is a planning tool, not a medical device — real due dates shift based on ultrasound dating, ovulation timing, and individual cycle variation. For fertility-window planning before conception, use the ovulation calculator; for ongoing appointments and milestones, keep it beside your prenatal-care schedule.
Nasıl Kullanılır
- Pick LMP or conception-date mode.
- Enter the relevant date.
- Read your estimated due date and current pregnancy week.
- See which trimester you're in and the estimated conception date.
Ne Zaman Kullanılır
- Preparing questions for a doctor or registered dietitian appointment.
- Reality-checking a wearable or app’s built-in estimate.
- Establishing baseline metrics for a fitness or nutrition program.
- General-population health planning (not diagnostic).
Ne Zaman Kullanılmaz
- Pediatric, geriatric, or pregnant users where adult formulas are inaccurate.
- Diagnostic decisions — consult a doctor.
- When the metric in question depends on lab work the calculator can’t see.
- Performance medicine for elite athletes — use sports-medicine specialists.
Yaygın Kullanım Senaryoları
- Quick calculation during a typical workday
- Pre-decision sanity-check on inputs and outputs
- Educational use — demonstrating the underlying concept
- Onboarding a colleague who needs the same calculation/conversion