Estimate your Estimated Due Date (EDD) and track how far along your pregnancy is using either your last menstrual period (LMP) or a known conception date.
Estimate your Estimated Due Date (EDD) and track how far along your pregnancy is using either your last menstrual period (LMP) or a known conception date. This calculator draws on peer-reviewed, industry-standard formulas used by fitness professionals, dietitians and clinicians worldwide, translated into a fast, easy-to-use browser tool.
Tracking metrics like this over time — rather than relying on a single reading — gives you a much clearer picture of trends in your health and fitness journey. Use this tool regularly alongside our other calculators for a fuller picture of your overall wellbeing.
The most common method (Naegele's Rule) adds 280 days to the first day of your last menstrual period, adjusted for your average cycle length.
Only about 5% of babies arrive on their exact due date. Most healthy births occur within a 'full term' window of 39 to 41 weeks.
If you know your conception date (e.g. from fertility tracking or IVF), select that option for a potentially more precise estimate.