Pregnancy Due Date Calculator
Estimate your pregnancy due date from your last period or conception date, with gestational weeks, trimester and pregnancy milestones.
Estimated due date
You're about
Trimester
Days to go
Key milestones
Contact your doctor or maternity unit urgently if you have
Heavy bleeding, severe tummy pain, a bad headache with blurred vision, fluid leaking, or fewer baby movements than usual later in pregnancy.
Your due date is an estimate
Only about 1 in 20 babies arrive on their due date. Most are born between 37 and 42 weeks. Your doctor may update the date after your dating scan.
For general information only. It isn’t medical advice. Please see your doctor or midwife to confirm your pregnancy and plan your care.
About this tool
The estimate uses 280 days from the last period, adjusted for cycle length, or 266 days from conception. Your maternity team can confirm dating. This tool is not designed for IVF dating.