Pregnancy Due Date Calculator: EDD, Trimesters and Leave
28 days is the default. Longer cycles push the due date later by the same number of days.
Your 40 weeks
1st trimester
Weeks 1 to 13
1 Jun to 6 Sept
2nd trimester
Weeks 14 to 27
7 Sept to 13 Dec
3rd trimester
Weeks 28 to 40
14 Dec to 8 Mar
- Early term (37 weeks)15 Feb 2027
- Full term (39 weeks)1 Mar 2027
- Due date (40 weeks)8 Mar 2027
- Late term (41 weeks)15 Mar 2027
- Post-term (42 weeks)22 Mar 2027
Your leave in Singapore
Based on the due date. Leave is counted from the actual birth, so the dates shift if the baby comes early or late.
You can start up to 4 weeks before the birth.
Government-Paid Maternity Leave: 16 weeks
Mon, 8 March 2027 to Sun, 27 June 2027
If taken in one block. With your employer's agreement, take the first 8 weeks in one block and the last 8 weeks flexibly within 12 months of the birth.
Government-Paid Paternity Leave: 4 weeks
Take by Sun, 27 June 2027
Continuous weeks within 16 weeks of the birth, or spread within 12 months by agreement with the employer. For fathers married to the mother (before the birth or within 12 months after).
Shared Parental Leave: 10 weeks
Use by Tue, 7 March 2028
Split 5 weeks each by default, and the parents can agree a different split. Taken within 12 months of the birth, after maternity and paternity leave are used.
A due date is an estimate, and babies are often born in the weeks either side of it. Your doctor may adjust it after the dating ultrasound scan.
Estimated due date
8 March 2027
- Today
- …
- Conception (approx.)
- 15 Jun 2026
- 2nd trimester from
- 7 Sept 2026
- 3rd trimester from
- 14 Dec 2026
- Paid leave for both parents
- 30 weeks
How this works
Pregnancy is counted as 40 weeks (280 days) from the first day of your last menstrual period, which is Naegele's rule. For cycles longer or shorter than 28 days, the due date moves by the difference: a 32-day cycle adds 4 days. From a known conception date the due date is 266 days later; from an IVF transfer it is 261 days after a day-5 embryo transfer or 263 days after a day-3 transfer.
Trimesters run from week 1 to the end of week 13, week 14 to the end of week 27, and week 28 to birth. Term is 37 weeks (early term), 39 weeks (full term), 41 weeks (late term) and 42 weeks (post-term).
For a Singapore citizen child, mothers get 16 weeks of Government-Paid Maternity Leave, starting up to 4 weeks before the birth, and fathers 4 weeks of Government-Paid Paternity Leave for babies born from 1 April 2025, taken within 16 weeks of the birth. Shared Parental Leave is 10 weeks for babies born from 1 April 2026 (6 weeks from 1 April 2025), split equally by default and used within 12 months. Leave dates here assume the baby arrives on the due date.
FAQs
How do I calculate my due date?
Add 280 days (40 weeks) to the first day of your last period. If your last period started on 1 June 2026, your estimated due date is 8 March 2027, assuming a 28-day cycle.
How is the due date worked out for IVF?
Add 261 days to the transfer date for a day-5 (blastocyst) embryo, or 263 days for a day-3 embryo. A day-5 transfer on 15 June 2026 gives a due date of 3 March 2027.
How long is maternity leave in Singapore in 2026?
16 weeks of Government-Paid Maternity Leave for a Singapore citizen child, if you have worked for your employer for at least 3 months before the birth. Otherwise, mothers covered by the Employment Act get 12 weeks.
How much paternity and shared parental leave do fathers get?
4 weeks of Government-Paid Paternity Leave for Singapore citizen babies born from 1 April 2025, plus Shared Parental Leave of 10 weeks for babies born from 1 April 2026, split 5 weeks each by default. That is up to 30 weeks of paid leave between both parents.
When does the second trimester start?
At 14 weeks, counted from the first day of your last period. The third trimester starts at 28 weeks. For a due date of 8 March 2027, that is 7 September 2026 and 14 December 2026.