Pregnancy is counted from the first day of your last period (2 weeks before conception). An early ultrasound gives the most accurate dating.
| Milestone | Date |
|---|---|
| End of first trimester (12 weeks) | Sat, 24 Oct 2026 |
| NT scan window (11–14 weeks) | Sat, 17 Oct 2026 |
| Anomaly scan (18–20 weeks) | Sat, 5 Dec 2026 |
| Second trimester ends (27 weeks) | Sat, 6 Feb 2027 |
| Glucose test (24–28 weeks) | Sat, 16 Jan 2027 |
| Full term begins (37 weeks) | Sat, 17 Apr 2027 |
| Due date (40 weeks) | Sat, 8 May 2027 |
| 42 weeks (overdue) | Sat, 22 May 2027 |
This calculator is also in our free app. Sign in with the same account to keep your history in sync.
Pregnancy is measured in weeks and days from the first day of your last period, not from a calendar month. This calculator tells you exactly where you are today: which week, which trimester, and how much of the pregnancy is complete.
Enter the first day of your last period to see your current week and day, your trimester, and your estimated due date.
| First Day of Last Menstrual Period | 1 May 2026 |
| You are | 24 weeks 6 days pregnant |
| Trimester | Second trimester (weeks 14–27) |
| Month of pregnancy | Month 6 |
| Estimated due date | Fri, 5 Feb 2027 |
| Days to go | 106 days (15 weeks 1 day) |
| Pregnancy completed | 62% |
| Baby is about the size of | a cauliflower |
24 weeks 6 days pregnant; Second trimester (weeks 14–27).
Try this example →| First Day of Last Menstrual Period | 1 Aug 2026 |
| You are | 11 weeks 5 days pregnant |
| Trimester | First trimester (weeks 1–13) |
| Month of pregnancy | Month 3 |
| Estimated due date | Sat, 8 May 2027 |
| Days to go | 198 days (28 weeks 2 days) |
| Pregnancy completed | 29% |
| Baby is about the size of | a lime |
11 weeks 5 days pregnant; due Sat, 8 May 2027.
Try this example →Pregnancy milestones — screenings, trimester changes, viability — are all defined by week, so counting in weeks is what your doctor will use too.
Week 13. The third trimester starts at week 27.
Full term is defined as 39 to 40 weeks 6 days. Babies born from 37 weeks are considered early term, and pregnancy can safely continue to 42 weeks.
Count the days from the first day of your last period to today and divide by 7. The calculator does this and shows the extra days too.
About 4½ months — the start of the fifth month.