---
title: "Pregnancy Due Date Calculator — EDD from LMP, Conception Date, or IVF"
description: "Calculate your estimated due date using Naegele's rule (LMP), conception date, or IVF transfer date. Includes trimester milestones. Free, no ads."
url: "https://worldcalculators.org/calculators/pregnancy-due-date/"
canonical: "https://worldcalculators.org/calculators/pregnancy-due-date/"
---

# Pregnancy Due Date Calculator

Calculate your estimated due date using Naegele's rule (LMP), conception date, or IVF transfer date. Includes trimester milestones. Free, no ads.

## Quick answer

EDD = LMP + 280 days (40 weeks). This is Naegele's rule, used by the NHS, ACOG (US), RANZCOG (Australia/NZ), and most obstetric guidelines globally. Only 5% of babies are born on the exact EDD — 80% are born within 2 weeks. Term is 37–42 weeks; full-term is 39–40 weeks. IVF due dates use the transfer date minus 17 days (3-day transfer) or 19 days (5-day blastocyst).

## Sources & Methodology

The estimated due date uses Naegele's rule (last menstrual period + 280 days); ultrasound dating may adjust this, per ACOG guidance.

Source: https://worldcalculators.org/calculators/pregnancy-due-date/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.