Due Date Calculator

Calculate your estimated due date based on your last menstrual period or conception date. Track your current week and trimester.

Inputs

Calculate From

Month

Day

Year

Tab to move between fields

Results

Estimated Due Date

3/22/2026

Estimated Conception Date6/29/2025

Current Week59 weeks

Trimester3

Days Remaining0 days

Progress100%

1st Trimester Ends9/7/2025

2nd Trimester Ends12/21/2025

How to Use This Calculator

Choose whether to calculate from Last Menstrual Period (LMP) or conception date.
Enter the month, day, and year of your LMP or conception date.
For IVF conceptions, enter the transfer date and embryo age (day 3 or day 5).
Review your Estimated Due Date, current pregnancy week, and trimester.
Use the milestone timeline to track key prenatal appointments and development stages.

What each input means

Calculate From: Calculation method to use.
Month: Month (1-12).
Day: Day of the month.
Year: The year to check.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Calculate From = 0, Month = 6, Day = 15, Year = 2025 = 4 input(s) provided
Calculate Estimated Due Date
Estimated Due Date = Date;
3/22/2026 = 3/22/2026
Calculate Estimated Conception Date
Estimated Conception Date = Date;
6/29/2025 = 6/29/2025
Calculate Current Week
Current Week
59 = 59

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Time & Date

Date Difference Calculator

Calculate the exact number of days, months, and years between two dates. Also shows weeks, hours, and minutes.

Time & Date

Age Calculator

Calculate your exact age in years, months, days, and more. Find out how many days until your next birthday.

Health & Fitness

Pregnancy Due Date Calculator

Calculate your estimated due date, current gestational week, trimester, and key pregnancy milestones.

Parenting & Family

Pregnancy & Baby Calculator

Comprehensive pregnancy and baby calculator with due date tracking, growth percentiles, feeding schedules, sleep guidelines, and first-year cost projections.

Clinical Medicine

Pregnancy Wheel Calculator

Calculate gestational age, estimated due date, and trimester from the last menstrual period (LMP) using Naegele's rule.