Pregnancy Due Date Calculator — LMP, gestational age & trimester timeline

Easiest Converter’s pregnancy due date calculator helps you estimate your expected delivery date and track progress week by week. Enter the first day of your last menstrual period (LMP) and we add ~280 days (40 weeks) to project the due date, while also showing your current gestation in weeks and days—clean, copy-ready, and easy to share with family or caregivers.

This pregnancy due date calculator follows the standard LMP method many clinics use. Because real cycles and ovulation vary, results are estimates—not medical advice. If your cycle length differs from 28 days or you conceived via IVF, your provider may refine the date using cycle adjustments or ultrasound measurements.

Use the tool to understand trimester milestones, plan leave, or align appointments. It runs entirely in your browser, keeps inputs simple, and presents a clear timeline so you can focus on what matters. Precision in wording and formatting makes the output easy to paste into notes, emails, or birth plan documents.

• LMP method ≈ 280 days; ultrasound dating may adjust the estimate.
• Gestational age counts from LMP, not conception; trimester cutoffs are approximate.
• Recheck after provider visits—clinical dating can supersede LMP-based estimates.