Pregnancy Calculator

In order to understand how the calculator works, please follow the instructions below:

First, input the last date of your menstrual period and the number of days in your menstrual cycle in the appropriate fields of the calculator and turn it on.

Second, if necessary, use the optional calculations to determine precisely at which stage of pregnancy you are. According to Women's Health magazine, a menstrual cycle typically lasts 28 days on average, but in some cases, it can be as short as 22 days or as long as 44 days.

Our innovative Pregnancy Calculator takes your menstrual cycle into account when calculating your conception or due date. You will need to enter the number of days in your menstrual cycle to obtain accurate results. If you have forgotten to do the calculations on your own due to work or other activities, the Pregnancy Calculator can serve as a perfect assistant for you.

When was the first day of your last menstrual period?


How many weeks will you be pregnant on a given date?


On which date will you be pregnant for the given number of weeks?

Given the birthday or due date, calculate the most likely conception date



1. Committee opinion no 611: method for estimating due date. Obstet Gynecol. 2014 Oct; 124(4):863-866.

2. Moore KL, Persaud TVN, Torchia MG. Before we are born: Essentials of embryology and birth defects. 8th. USA: Elsevier Sanuders; 2013.

You may also be interested in our Pregnancy Weight Gain Calculator

Rating: 3.9/5 (211 votes)