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Health & Fitness

Pregnancy Due Date Calculator.

Estimate your pregnancy due date based on the date of your last menstrual period.

FREE INSTANT RESULTS NO SIGNUP UPDATED 2026

Parameters

days
days

Summary Output

Current Gestation Age
6 weeks weeks
Days Until Due Date
235 days days

How to Use

Enter the estimated number of days since your last period started, alongside your typical cycle length. Estimates developmental timeline.

Example Calculation

LMP 45 days ago with a 28-day cycle yields 6.4 weeks along, with 235 days remaining until birth.

Formula

Due Date = LMP + 280 days + (Cycle Length - 28 days)

Frequently Asked Questions

Common questions and answers about the Pregnancy Due Date Calculator.

The Pregnancy Due Date Calculator is a free online tool designed to estimate your pregnancy due date based on the date of your last menstrual period. It allows you to perform these calculations quickly and accurately without manual computations.
Enter the estimated number of days since your last period started, alongside your typical cycle length. Estimates developmental timeline. Once you enter these values, the calculator will automatically compute and display the results instantly.
The Pregnancy Due Date Calculator uses the following formula to calculate your results: Due Date = LMP + 280 days + (Cycle Length - 28 days) This formula is standard and widely accepted for these types of calculations.
Sure! Here is a practical example: LMP 45 days ago with a 28-day cycle yields 6.4 weeks along, with 235 days remaining until birth. This example demonstrates how the inputs are processed through the formula to yield the final results.
To use the Pregnancy Due Date Calculator, you need to enter: Days Since Last Menstrual Period, Average Cycle Length. These inputs help the tool calculate precise results tailored to your situation.
The Pregnancy Due Date Calculator outputs the following details: Current Gestation Age, Days Until Due Date. This comprehensive breakdown helps you understand the different aspects of the calculated figures.
Yes, the Pregnancy Due Date Calculator is 100% free with no registration or signup required. It is fully responsive and optimized for mobile phones, tablets, and desktop computers.
Reliable Calculator provides a fast, clean, ad-free, and premium user experience. The Pregnancy Due Date Calculator uses verified math formulas and provides instant results with visual breakdowns and examples, making it more intuitive than other tools.