Highlighted rows fall within 09:00–18:00 in both places: 7 shared working hours.
How many hours is IST behind SGT?
As abbreviations, SGT is always 2.5 hours ahead of IST: IST is UTC+5:30 and SGT is UTC+8. To convert, add 2.5 hours.
Does the IST to SGT time difference change?
No. Sgt is 2.5 hours ahead of ist all year, because neither place changes its clocks.
When IST and SGT are both at work
When SGT is 2.5 hours ahead of IST: 6 shared office hours, 09:00 to 15:00 in IST (11:30 to 17:30 in SGT).
IST to SGT conversion
Singapore Time (SGT) is UTC+8. India Standard Time (IST) is UTC+5:30. The difference is constant: Singapore is 2.5 hours ahead of India.
When it is 09:00 IST, it is 11:30 SGT. When it is 18:00 IST, it is 20:30 SGT. The half-hour offset means you cannot round to a full hour. A 09:00 meeting in India starts at 11:30 in Singapore.
What is 9 AM IST in SGT?
IST
SGT
00:00
02:30
01:00
03:30
02:00
04:30
03:00
05:30
04:00
06:30
05:00
07:30
06:00
08:30
07:00
09:30
08:00
10:30
09:00
11:30
10:00
12:30
11:00
13:30
12:00
14:30
13:00
15:30
14:00
16:30
15:00
17:30
16:00
18:30
17:00
19:30
18:00
20:30
19:00
21:30
20:00
22:30
21:00
23:30
22:00
00:30 (next day)
23:00
01:30 (next day)
Why Singapore-India coordination is easy
Neither zone observes daylight saving time. IST stays UTC+5:30 year-round. SGT stays UTC+8 year-round. The 2.5-hour gap never changes.
On 15 January 2026, Singapore is 2.5 hours ahead. On 15 July 2026, Singapore is still 2.5 hours ahead. No seasonal shift. No clock change to track. The only risk is forgetting the half-hour.
Frequently asked questions about IST and SGT time
Is Singapore ever 3.5 hours ahead of India?
No. Singapore does not observe DST. The difference is always 2.5 hours.
What is the best time for a meeting between India and Singapore?
Standard business hours overlap well. 09:00-12:00 IST is 11:30-14:30 SGT. 14:00-17:00 IST is 16:30-19:30 SGT. Both sides get a reasonable working window.
Does Sri Lanka use the same time as India?
Sri Lanka Standard Time uses the same offset (UTC+5:30) but is legally distinct. For conversion purposes, treat Sri Lanka time the same as IST when converting to SGT.
What is the time in Mumbai compared to Singapore?
Mumbai (Asia/Kolkata) is UTC+5:30. Singapore is UTC+8. When it is 12:00 in Mumbai, it is 14:30 in Singapore.
Do I need to worry about DST for Indian or Singapore time?
No. India has never observed DST at the national level. The conversion is fixed.
How many hours ahead is SGT of IST?
SGT (UTC+8) is 2.5 hours ahead of IST (UTC+5:30).
Does the time difference between IST and SGT change during the year?
No, it stays 2.5 hours ahead all year because neither place changes its clocks.