Health Tools

预产期计算器

使用 Naegele 法则计算预产期 — 从末次月经或受孕日起的当前孕周、三月期和剩余天数

Estimated Due Date
Sunday, November 29, 2026
Current WeekWeek 10, Day 0
TrimesterFirst Trimester (Weeks 1-12)
Days Until Due Date30 weeks, 0 days

About the Calculation

  • LMP Method: Naegele's rule — adds 280 days (40 weeks) to the first day of your last menstrual period
  • Conception Method: Adds 266 days (38 weeks) to the estimated conception date
  • • Only 5% of babies are born on their exact due date — most arrive within 2 weeks before or after
  • • This is an estimate. Consult your healthcare provider for accurate dating via ultrasound

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