Estimate your baby's delivery date (EDD) using your LMP, conception date, ultrasound measurements, or IVF embryo transfer details. Includes weekly gestational age, fruit size comparisons, and trimester timelines.
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Health & Folk Guide
About the Pregnancy Due Date Calculator
The Pregnancy Due Date Calculator provides an accurate way to estimate your expected delivery date (EDD) and follow fetal development milestones. It accommodates four distinct calculation methods: Last Menstrual Period (with custom menstrual cycle adjustments), known Conception Date, Ultrasound Scan results (based on gestational age at the time of the scan), and IVF Embryo Transfer (Day 3 or Day 5 blastocyst transfers). Alongside your due date, the tool outlines current gestational age in weeks and days, visualizes trimester progression, compares fetal growth to relatable fruit sizes week by week, tracks key clinical milestones, and reveals the baby's expected zodiac sign.
Step-by-Step Guide
How to Use Pregnancy Due Date Calculator
1Select your preferred calculation approach: Last Menstrual Period, Conception Date, Ultrasound Scan, or IVF Transfer.
2Provide your reference date and input any required parameters (such as typical cycle duration, scan weeks/days, or embryo transfer stage).
3Review your Estimated Date of Delivery (EDD) alongside the projected conception date.
4Follow your current gestational progress in weeks and days, check the trimester visualizer, and see the matching baby fruit comparison.
5Examine the pregnancy milestone timeline and use the copy or share buttons to save your summary.
Capabilities
Key Features & Highlights
Four Flexible Calculation Methods: support for LMP (incorporating Naegele's rule with custom cycle lengths), Conception Date, Ultrasound biometric dating, and IVF transfer protocols.
Gestational Age & Trimester Visualizer: tracks current pregnancy duration in weeks and days against a 40-week timeline gauge.
Week-by-Week Fruit Size Benchmarks: compares fetal development to everyday fruits and vegetables from poppy seed to watermelon.
Milestone Timeline Tracker: maps out essential developmental markers including first heartbeat, anatomy scan, viability threshold, and full term.
Astrological Zodiac Indicator: projects the astrological sun sign corresponding to the expected birth date.
Privacy-First Local Processing: all health calculations remain confidential on your device with no remote data storage.
Practical Scenarios
Examples & Real-World Use Cases
LMP-Based Due Date Calculation
Scenario: Estimating delivery date from an LMP of January 1, 2026 with a standard 28-day cycle.
Sample Input:
LMP Date: Jan 1, 2026 (Cycle: 28 days)
Expected Output:
Estimated Due Date (EDD): Thursday, October 8, 2026 (Conception: Jan 15, 2026)
Applies standard 280-day gestational mathematics adjusted for cycle length.
IVF Day 5 Blastocyst Calculation
Scenario: Calculating due date following a Day 5 embryo transfer on February 1, 2026.
Sample Input:
IVF Transfer Date: Feb 1, 2026 (Day 5 Transfer)
Expected Output:
Estimated Due Date (EDD): Tuesday, October 20, 2026
Calculates the exact 261-day post-transfer gestational interval.
Common Questions
Frequently Asked Questions
Naegele's rule estimates the delivery date by projecting 280 days (40 weeks) forward from the start of the last menstrual period, adjusting for deviations from a standard 28-day cycle.
