Health & Fitness
Pregnancy Due Date Calculator
Estimate a pregnancy due date from the first day of the last menstrual period or conception date.
Calculator
PREGNANCY
Estimate your due date
Choose a dating method and enter the relevant date.
YOUR RESULT
HOW IT WORKS
About This Calculator
A pregnancy due date is an estimate. Pregnancy commonly lasts about 40 weeks from the first day of the last menstrual period, while dating from conception uses about 38 weeks. Ultrasound dating may change the estimate.
Formula & Notes
From LMP: add 280 days. From conception: add 266 days.
Results are estimates for general informational use and should not be treated as medical, financial, or professional advice where applicable.