IST to UTC
Coordinated Universal Time is 5 hours 30 minutes behind India Standard Time, all year round.
IST to UTC conversion table
Every hour of the day, India Standard Time to Coordinated Universal Time. The gap never changes, so this table holds on every date.
| IST | UTC |
|---|---|
| 12:00 AM | 6:30 PM −1 day |
| 1:00 AM | 7:30 PM −1 day |
| 2:00 AM | 8:30 PM −1 day |
| 3:00 AM | 9:30 PM −1 day |
| 4:00 AM | 10:30 PM −1 day |
| 5:00 AM | 11:30 PM −1 day |
| 6:00 AM | 12:30 AM |
| 7:00 AM | 1:30 AM |
| 8:00 AM | 2:30 AM |
| 9:00 AM | 3:30 AM |
| 10:00 AM | 4:30 AM |
| 11:00 AM | 5:30 AM |
| IST | UTC |
|---|---|
| 12:00 PM | 6:30 AM |
| 1:00 PM | 7:30 AM |
| 2:00 PM | 8:30 AM |
| 3:00 PM | 9:30 AM |
| 4:00 PM | 10:30 AM |
| 5:00 PM | 11:30 AM |
| 6:00 PM | 12:30 PM |
| 7:00 PM | 1:30 PM |
| 8:00 PM | 2:30 PM |
| 9:00 PM | 3:30 PM |
| 10:00 PM | 4:30 PM |
| 11:00 PM | 5:30 PM |
Shared working hours
Taking a working day as 09:00–17:00 in each zone, India Standard Time and Coordinated Universal Time overlap for 2 hours 30 minutes.
2:30 PM–5:00 PM in IST is 9:00 AM–11:30 AM in UTC.
When the difference changes
It doesn't. Coordinated Universal Time is 5 hours 30 minutes behind India Standard Time on every date of the year. India Standard Time runs at UTC+05:30; Coordinated Universal Time runs at UTC+00:00.
About India Standard Time
India keeps one clock, UTC+5:30, across a country spanning about 29 degrees of longitude — the sun rises nearly two hours earlier in Arunachal Pradesh than in Gujarat on the same clock. The half-hour offset means most conversions from India land on the half hour rather than the hour. Sri Lanka keeps the same time.
Cities on this clock: Mumbai, Delhi, Bangalore, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad.
Watch out: IST is also Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). This page is the Indian one.
About Coordinated Universal Time
UTC never shifts. It is the reference every other zone is defined against, which is why logs, flight schedules and protocol timestamps use it. GMT is the same clock for every civil purpose, so a query for one is answered by the other.
Cities on this clock: Reykjavik, Accra, Abidjan, Dakar.
Watch out: GMT is also used loosely to mean "UK time", and those are not the same thing for seven months of the year — the United Kingdom moves to BST (UTC+1) while UTC stays put.
How the difference is worked out
Neither India Standard Time nor Coordinated Universal Time moves its clock relative to the other, so coordinated universal time is 5 hours 30 minutes behind india standard time is a rule rather than a fact about one particular year. The hour-by-hour table above holds on every date.
With both zones on their own standard time — daylight saving not in force anywhere — Coordinated Universal Time is 5 hours 30 minutes behind India Standard Time. That figure never changes; everything else on this page follows from it plus whichever clocks have moved.
Every figure here comes from the IANA time zone database via your browser's own Intl engine, using the zone ids Asia/Kolkata and UTC. Nothing is looked up on a server and nothing about your visit is recorded.
Is UTC ahead of or behind IST?
Coordinated Universal Time is 5 hours 30 minutes behind India Standard Time, all year round. India Standard Time runs at UTC+05:30; Coordinated Universal Time runs at UTC+00:00. Because neither zone changes its clock, the gap never moves.
What time is 9 AM IST in UTC?
9:00 AM IST is 3:30 AM UTC.
When can India Standard Time and Coordinated Universal Time meet?
Taking a working day as 09:00–17:00 in each zone, the two overlap for 2 hours 30 minutes: 2:30 PM–5:00 PM in India Standard Time, which is 9:00 AM–11:30 AM in Coordinated Universal Time.
What does IST stand for?
IST is India Standard Time, also written India time, Delhi time, Mumbai time. IST is also Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). This page is the Indian one.