What is IST in GMT?
Greenwich Mean Time is 5 hours 30 minutes behind
India Standard Time is on UTC+5:30 and Greenwich Mean Time is on UTC+0:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in New Delhi
- 7:44 am
- Time in Greenwich
- 2:14 am
- Difference
- −5:30 h
- Next clock change
- Neither zone
Convert a time
GMT — Greenwich Mean Time
1:30 am
Wed
Daylight saving
India Standard Time
India Standard Time stays on IST all year, so its offset from UTC never moves.
Greenwich Mean Time
Greenwich Mean Time stays on GMT all year, so its offset from UTC never moves.
IST to GMT conversion table
Every hour of Wednesday, September 23, 2026, converted from India Standard Time to Greenwich Mean Time. 6 of the 24 hours fall on a different calendar day in Greenwich, which is marked.
- 12:00 am IST
- 6:30 pm GMT−1 day
- 1:00 am IST
- 7:30 pm GMT−1 day
- 2:00 am IST
- 8:30 pm GMT−1 day
- 3:00 am IST
- 9:30 pm GMT−1 day
- 4:00 am IST
- 10:30 pm GMT−1 day
- 5:00 am IST
- 11:30 pm GMT−1 day
- 6:00 am IST
- 12:30 am GMT
- 7:00 am IST
- 1:30 am GMT
- 8:00 am IST
- 2:30 am GMT
- 9:00 am IST
- 3:30 am GMT
- 10:00 am IST
- 4:30 am GMT
- 11:00 am IST
- 5:30 am GMT
- 12:00 pm IST
- 6:30 am GMT
- 1:00 pm IST
- 7:30 am GMT
- 2:00 pm IST
- 8:30 am GMT
- 3:00 pm IST
- 9:30 am GMT
- 4:00 pm IST
- 10:30 am GMT
- 5:00 pm IST
- 11:30 am GMT
- 6:00 pm IST
- 12:30 pm GMT
- 7:00 pm IST
- 1:30 pm GMT
- 8:00 pm IST
- 2:30 pm GMT
- 9:00 pm IST
- 3:30 pm GMT
- 10:00 pm IST
- 4:30 pm GMT
- 11:00 pm IST
- 5:30 pm GMT
Scheduling between the two
Working hours overlap from 3:00 pm to 6:00 pm IST, which is 9:30 am to 12:30 pm GMT. Anything inside that window falls in the normal working day at both ends.
A note on IST: it can also mean Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). This page means India Standard Time, which is what almost all searches for IST want.
India Standard Time (IST) is used in all of India and Sri Lanka, on a single UTC+5:30 offset with no daylight saving
Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.