Baby Due Date Calculator

The estimated due date is one of the first things expecting parents want to know, since it shapes everything from doctor visit scheduling to nursery preparation timelines. This calculator uses Naegele's rule — the same standard method doctors commonly use — which counts 280 days from the first day of your last menstrual period to arrive at an estimated delivery date. Along with the due date, it shows which week of pregnancy you are currently in and which trimester that falls under, giving you a quick reference point without waiting for your next appointment. Keep in mind this is an estimate based on an average cycle, and your doctor's ultrasound-based dating should always be treated as the more precise reference.