There are two common ways to calculate due date. This calculator can do either one.
Most accurate for those with regular 28 day cycles.
Due date is calculated from the first day of your last menstrual period (LMP).
This is usually about 2 weeks before you actually conceived.
Assumes you ovulated 14 days after your LMP.
You must know when you ovulated. More accurate for those with irregular menstrual cycles.
Due date is calculated from the date you ovulated.
Use fertile mucus, LH surge and basal body temperature as indicators.
Using the buttons below, select the method you would like to use for calculating your due date:
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health.