IST to UTC converter
India Standard Time to Coordinated Universal Time. UTC is 5 h 30 min behind of IST all year.
From
IST · Kolkata GMT+5:30 · UTC+5:30
- UTC · UTCUTC · UTC+0 · 5 h 30 min behind03:30Mon, Sep 28
The gap between IST and UTC
| 2026 | IST clocks | UTC clocks | Difference |
|---|---|---|---|
| January | GMT+5:30 UTC+5:30 | UTC UTC+0 | 5 h 30 min behind |
| July | GMT+5:30 UTC+5:30 | UTC UTC+0 | 5 h 30 min behind |
Neither clock changes relative to the other, so this gap holds all year.
Convert the other way: UTC to IST · Plan a meeting across more places
IST to UTC time table
Every hour of the IST day and the matching UTC time, for a mid-January and a mid-July date (they are identical, since the gap never changes).
| IST | UTC · January |
|---|---|
| 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 |
| 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 |
About these two clocks
IST — India Standard Time. Used in all of India — Mumbai, Delhi, Bengaluru. India does not use daylight saving time, so IST is UTC+5:30 all year.
UTC — Coordinated Universal Time. Used in the world reference clock used by servers, aviation and logs. UTC never changes for daylight saving time.
All figures on this page come from the IANA time zone database (the same data your phone and laptop use), evaluated for the date in question. Abbreviations are ambiguous — “IST” also means Irish or Israel Standard Time, and “CST” is China Standard Time in Asia — so this page uses Asia/Kolkata and UTC explicitly.
Questions people ask
How many hours ahead or behind is UTC compared with IST?
UTC is 5 h 30 min behind of IST all year, because the offset between the two clocks does not change.
What is 9 am IST in UTC?
On a January date, 9:00 am IST is 3:30 AM UTC. Use the converter above for any other date.
Which cities use IST?
India Standard Time (IST) is used in all of India — Mumbai, Delhi, Bengaluru. India does not use daylight saving time, so IST is UTC+5:30 all year.
Which cities use UTC?
Coordinated Universal Time (UTC) is used in the world reference clock used by servers, aviation and logs. UTC never changes for daylight saving time.
When is a good time for a IST–UTC call?
Look for the hours where both columns in the table fall between about 8 am and 6 pm. If none exist, the meeting planner on our home page shows the least-bad options and lets you share a link that converts for every attendee.
Related conversions
IST to ESTIST to CSTEST to UTCIST to PSTIST to GMTIST to CETPST to UTCCST to UTCIST to AESTIST to JST