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Pregnancy Due Date Calculator

Calculate estimated baby delivery due date, conception timeframe, and gestational age using Naegele’s Rule.

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Interactive Pregnancy Due Date Calculator Workspace

Live Solver
Solver Sandbox: This is a premium sandbox template for **Pregnancy Due Date Calculator**. The calculations are pre-configured to estimate variables. Below is the responsive form.

Mathematical Formula & Variables

Equation ModelDue Date = First Day of Last Period + 280 Days (40 Weeks)

Standard clinical Naegele rule adding 280 days to last menstrual period.

Variable Definitions

SymbolDescription
LMP DateFirst day of last menstrual period

How to Use the Pregnancy Due Date Calculator

  • Select the first day of your last menstrual period (LMP) or conception date.
  • Select average cycle length.
  • Calculate estimated delivery due date, trimester milestones, and current week of pregnancy.

Practical Example Calculation

Scenario Context: Last menstrual period started January 15th.

Step 1: Add 1 year (Jan 15 next year), subtract 3 months (Oct 15), add 7 days = October 22nd.
Step 2: Total gestation period: 280 days / 40 weeks.
Estimated Baby Due Date: October 22nd.

Frequently Asked Questions

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