GMT to IST converter
IST is 5 hours 30 minutes ahead of GMT all year. Both zones keep the same relationship through the daylight saving changes, so the gap in 2026 never moves.
GMT to IST conversion table
Every hour of the day in GMT and what it is in IST. The columns use a January date and a July date, so you can see how daylight saving changes the answer.
| Time in GMT | Time in IST |
|---|---|
| 12 AM | 5:30 AM |
| 1 AM | 6:30 AM |
| 2 AM | 7:30 AM |
| 3 AM | 8:30 AM |
| 4 AM | 9:30 AM |
| 5 AM | 10:30 AM |
| 6 AM | 11:30 AM |
| 7 AM | 12:30 PM |
| 8 AM | 1:30 PM |
| 9 AM | 2:30 PM |
| 10 AM | 3:30 PM |
| 11 AM | 4:30 PM |
| 12 PM | 5:30 PM |
| 1 PM | 6:30 PM |
| 2 PM | 7:30 PM |
| 3 PM | 8:30 PM |
| 4 PM | 9:30 PM |
| 5 PM | 10:30 PM |
| 6 PM | 11:30 PM |
| 7 PM | 12:30 AM next day |
| 8 PM | 1:30 AM next day |
| 9 PM | 2:30 AM next day |
| 10 PM | 3:30 AM next day |
| 11 PM | 4:30 AM next day |
How to convert GMT to IST
To convert GMT to IST by hand, add 5 hours 30 minutes for most of the year, then fix the date if you cross midnight.
- 8 PM GMT on 15 January is 1:30 AM IST the next day.
- 8 PM GMT on 15 October is 1:30 AM IST the next day.
UTC is the easy anchor: convert to UTC first, then to the other zone, and you never have to think about which side changed its clocks.
About the two time zones
Greenwich Mean Time (GMT). Used in: Reykjavik and much of West Africa use GMT all year. No daylight saving: the offset is the same all year.
GMT and UTC show the same time. The UK is on GMT only in winter; in summer it moves to BST, which is one hour ahead. This page uses the fixed GMT (UTC+0) zone.
India Standard Time (IST). Used in: Delhi, Mumbai, Bengaluru, Kolkata, Chennai. No daylight saving: the offset is the same all year.
India is UTC+5:30, so conversions often end in :30. IST can also mean Irish Standard Time or Israel Standard Time; here it means India.
Skip the converter: let Herewise do it on every page
Herewise is a free Chrome extension. When a page says "8 PM EST", "75°F" or "$49", it adds a small label with the time, temperature or price in your own time zone, units and currency. Free, no account, nothing you read leaves your browser.
Questions
What is 8 PM GMT in IST?
8 PM GMT on 15 January is 1:30 AM IST the next day.
Is IST ahead of or behind GMT?
IST is 5 hours 30 minutes ahead of GMT all year. Both zones keep the same relationship through the daylight saving changes, so the gap in 2026 never moves.
Does daylight saving change the difference between GMT and IST?
No. Greenwich Mean Time: No daylight saving: the offset is the same all year. India Standard Time: No daylight saving: the offset is the same all year.
How can I see GMT times in my own time zone automatically?
Install Herewise, a free Chrome extension. When a web page says a time like 8 PM GMT, it adds a small label with that time in your own time zone, using the correct date for daylight saving.