GMT to IST time converter
From Mar 29 to Oct 24, IST is 4h 30m ahead of BST. From Oct 25 to Mar 28, IST is 5h 30m ahead of GMT. From Mar 29 to Oct 24, 9:00 AM BST is 1:30 PM IST. From Oct 25 to Mar 28, 9:00 AM GMT is 2:30 PM IST.
How many hours is IST from GMT?
Today, IST is 4h 30m ahead of BST.
From Mar 29 to Oct 24, IST is 4h 30m ahead of BST. From Oct 25 to Mar 28, IST is 5h 30m ahead of GMT.
BST and GMT are both UK Time (London).
What's the best time for a meeting between GMT and IST?
9:00 AM to 1:30 PM BST (1:30 PM to 6:00 PM IST) falls inside 9 AM to 6 PM work hours on both sides.
What time is it in IST for each hour in GMT?
Every hour of today in GMT, with daylight saving applied. Green means work hours (9 AM to 6 PM) on both sides.
| BST | IST | Day |
|---|---|---|
| 12:00 AM | 4:30 AM | |
| 1:00 AM | 5:30 AM | |
| 2:00 AM | 6:30 AM | |
| 3:00 AM | 7:30 AM | |
| 4:00 AM | 8:30 AM | |
| 5:00 AM | 9:30 AM | |
| 6:00 AM | 10:30 AM | |
| 7:00 AM | 11:30 AM | |
| 8:00 AM | 12:30 PM | |
| 9:00 AM | 1:30 PM | |
| 10:00 AM | 2:30 PM | |
| 11:00 AM | 3:30 PM | |
| 12:00 PM | 4:30 PM | |
| 1:00 PM | 5:30 PM | |
| 2:00 PM | 6:30 PM | |
| 3:00 PM | 7:30 PM | |
| 4:00 PM | 8:30 PM | |
| 5:00 PM | 9:30 PM | |
| 6:00 PM | 10:30 PM | |
| 7:00 PM | 11:30 PM | |
| 8:00 PM | 12:30 AM | next day |
| 9:00 PM | 1:30 AM | next day |
| 10:00 PM | 2:30 AM | next day |
| 11:00 PM | 3:30 AM | next day |
Questions
From Mar 29 to Oct 24, IST is 4h 30m ahead of BST. From Oct 25 to Mar 28, IST is 5h 30m ahead of GMT. BST and GMT are both UK Time (London).
Yes. UK Time changes its clocks on Mar 29 and Oct 25, 2026. India doesn't change clocks. The GMT to IST gap follows these dates, and so does the converter on this page.
From Mar 29 to Oct 24, 9:00 AM BST is 1:30 PM IST. From Oct 25 to Mar 28, 9:00 AM GMT is 2:30 PM IST.
From Mar 29 to Oct 24: 9:00 AM to 1:30 PM BST (1:30 PM to 6:00 PM IST) falls inside 9 AM to 6 PM work hours on both sides. From Oct 25 to Mar 28: 9:00 AM to 12:30 PM GMT (2:30 PM to 6:00 PM IST) falls inside 9 AM to 6 PM work hours on both sides.
Drag on the GMT clock above to mark when you're free, then tap Copy link or Copy image. The IST clock shows them in their time, and the link opens in their own time zone with no sign-up.
Related conversions
More with GMT or IST: IST to EST, IST to PST, IST to CST, IST to UTC, IST to EDT, IST to PDT, PDT to IST, IST to CDT, CDT to IST, IST to BST, CET to IST, IST to CET, AEST to IST, SGT to IST, GMT to EST, GST to IST, IST to MST, IST to AEST, IST to SGT, IST to GST, IST to JST, IST to NZT, EST to GMT, PST to GMT, GMT to PST, WAT to GMT, EAT to GMT
How this page is made: every time here is computed from the IANA time zone database for the date shown, the same data your phone clock uses. Checked October 15, 2026. Spot a wrong time? Tell us.