IST to GMT time converter
From Mar 29 to Oct 24, BST is 4h 30m behind IST. From Oct 25 to Mar 28, GMT is 5h 30m behind IST. From Mar 29 to Oct 24, 9:00 AM IST is 4:30 AM BST. From Oct 25 to Mar 28, 9:00 AM IST is 3:30 AM GMT.
How many hours is GMT from IST?
Today, BST is 4h 30m behind IST.
From Mar 29 to Oct 24, BST is 4h 30m behind IST. From Oct 25 to Mar 28, GMT is 5h 30m behind IST.
BST and GMT are both UK Time (London).
What's the best time for a meeting between IST and GMT?
1:30 PM to 6:00 PM IST (9:00 AM to 1:30 PM BST) falls inside 9 AM to 6 PM work hours on both sides.
What time is it in GMT for each hour in IST?
Every hour of today in IST, with daylight saving applied. Green means work hours (9 AM to 6 PM) on both sides.
| IST | BST | Day |
|---|---|---|
| 12:00 AM | 7:30 PM | previous day |
| 1:00 AM | 8:30 PM | previous day |
| 2:00 AM | 9:30 PM | previous day |
| 3:00 AM | 10:30 PM | previous day |
| 4:00 AM | 11:30 PM | previous day |
| 5:00 AM | 12:30 AM | |
| 6:00 AM | 1:30 AM | |
| 7:00 AM | 2:30 AM | |
| 8:00 AM | 3:30 AM | |
| 9:00 AM | 4:30 AM | |
| 10:00 AM | 5:30 AM | |
| 11:00 AM | 6:30 AM | |
| 12:00 PM | 7:30 AM | |
| 1:00 PM | 8:30 AM | |
| 2:00 PM | 9:30 AM | |
| 3:00 PM | 10:30 AM | |
| 4:00 PM | 11:30 AM | |
| 5:00 PM | 12:30 PM | |
| 6:00 PM | 1:30 PM | |
| 7:00 PM | 2:30 PM | |
| 8:00 PM | 3:30 PM | |
| 9:00 PM | 4:30 PM | |
| 10:00 PM | 5:30 PM | |
| 11:00 PM | 6:30 PM |
Questions
From Mar 29 to Oct 24, BST is 4h 30m behind IST. From Oct 25 to Mar 28, GMT is 5h 30m behind IST. 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 IST to GMT gap follows these dates, and so does the converter on this page.
From Mar 29 to Oct 24, 9:00 AM IST is 4:30 AM BST. From Oct 25 to Mar 28, 9:00 AM IST is 3:30 AM GMT.
From Mar 29 to Oct 24: 1:30 PM to 6:00 PM IST (9:00 AM to 1:30 PM BST) falls inside 9 AM to 6 PM work hours on both sides. From Oct 25 to Mar 28: 2:30 PM to 6:00 PM IST (9:00 AM to 12:30 PM GMT) falls inside 9 AM to 6 PM work hours on both sides.
Drag on the IST clock above to mark when you're free, then tap Copy link or Copy image. The GMT clock shows them in their time, and the link opens in their own time zone with no sign-up.
Related conversions
More with IST or GMT: EST to IST, PST to IST, CST to IST, UTC to IST, EDT to IST, IST to PDT, PDT to IST, IST to CDT, CDT to IST, BST to IST, 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.