A clearer picture of the weeks ahead.
Estimate a due date and explore key pregnancy milestones. Simple calculations to support conversations and planning.
Your estimated due date
6 December 2026
Sunday · 40 weeks, 0 days
Gestational age
15 weeks, 4 days
You’re in the
2nd trimester
Based on a 28-day cycle and the first day of your last period. An estimate, not a prediction: your care provider may adjust this date after an ultrasound.
For information and planning only. This tool does not diagnose pregnancy or replace an individual assessment. If your cycles are irregular, you have had fertility treatment or you’re unsure of your dates, speak with your midwife or care provider.
A few dates along the way.
Based on the dates above. Typical timing; screening schedules vary by region and care provider.
A useful estimate.
Not an exact science.
Every pregnancy follows its own rhythm. Use these dates as a starting point for a conversation, rather than a fixed schedule.
Browse pregnancy resourcesHow is my due date calculated?
We add 280 days (40 weeks) to the first day of your last period, then adjust for the difference between your cycle length and 28 days. Gestational age is counted from your last period, not conception.
What if my cycles are irregular?
If your cycles vary a lot, a last-period date may not be a reliable starting point. An early ultrasound is usually the best way to date a pregnancy; you can enter the scan date and gestational age using the Ultrasound option.
Can an ultrasound change my due date?
Yes. Care providers often adjust a due date when an early scan differs meaningfully from the date based on the last period. Follow the date your midwife or care provider gives you.
Is my information stored?
No. The calculation runs in your browser. The dates you enter are not sent to or saved by Midwife Tools.