# Baby Due Date Calculator

The first method is based around a calculation using the first day of your last period. The second method is based around using the conception date when the baby was conceived. Most healthcare providers generally use the first method for the main reason that pinpointing down a conception date can often be challenging and a little more inaccurate. For this reason, our due date calculator is based around the first day of your last period. The basic formula for this method can be seen in the formula box below.

First Day Of Last Period + 280 Days

Obviously there is rarely a precise date when it comes to calculating your baby’s due date. Depending on your particular scenario and circumstances, this due date could be anywhere from several weeks early to several weeks late. However, using this basic calculator will at least give you a close estimate to the general time frame of when you should be expecting.