Gestational Age Calculator and Estimated Due Date

Calcola la data presunta del parto e l’età gestazionale attuale





Inserisci la data dell’ultima mestruazione o del concepimento per calcolare la data del parto.

The Gestational Age Calculator and Estimated Due Date is a simple and reliable tool to estimate the due date and know the current gestational age, based on the last menstrual period (LMP) or a estimated conception date.
It is useful for expectant mothers, doctors, midwives, and healthcare professionals.

How it Works

The user inputs:

  • The calculation method (last menstrual date or conception);
  • The reference date (in dd/mm/yyyy format).

The app automatically calculates:

  • The current gestational age in weeks and days;
  • The remaining weeks until delivery;
  • The expected due date (EDD);
  • The indication of the trimester of pregnancy (1st, 2nd, or 3rd).

Example

For a last menstrual date of 15/03/2025, on 17/10/2025:

  • Gestational age: 31 weeks
  • Remaining weeks: 9
  • Estimated due date: 20/12/2025
  • Gestational period: Third trimester

Why Use It

This calculator is perfect for:

  • Monitoring the progress of pregnancy;
  • Planning check-ups, tests, and visits;
  • Providing a quick estimate of the due date;
  • Deepening the understanding of the gestational period.

Additional Features

  • Calculation based on 280 days (LMP) or 266 days (conception);
  • Automatic indication of the trimester;
  • Informative messages for each phase of pregnancy;
  • Quick copy of the results;

Warnings

The results provided are approximate estimates based on statistical averages.
Each pregnancy is unique: the actual date of delivery may vary by ±2 weeks.
It is recommended to always confirm the due date with your doctor or gynecologist through ultrasound.