GMT to IST
GMT and IST explained
Greenwich Mean Time (GMT) is UTC+0, the reference time at the Greenwich meridian. GMT itself never changes. The UK uses GMT only in winter: from the last Sunday in March to the last Sunday in October it is on BST (UTC+1), so "GMT" and "UK time" are an hour apart in summer.
India Standard Time (IST) is UTC+5:30 all year: the whole of India has no daylight saving time. "IST" can also mean Irish Standard Time or Israel Standard Time; here it means India Standard Time.
The difference across the year
IST is 5 hours 30 minutes ahead of GMT all year.
Common times
| GMT | IST |
|---|---|
| 00:00 12am | 05:30 5:30am |
| 06:00 6am | 11:30 11:30am |
| 08:00 8am | 13:30 1:30pm |
| 09:00 9am | 14:30 2:30pm |
| 12:00 12pm | 17:30 5:30pm |
| 15:00 3pm | 20:30 8:30pm |
| 17:00 5pm | 22:30 10:30pm |
| 18:00 6pm | 23:30 11:30pm |
| 21:00 9pm | 02:30 2:30am, next day |
How to use the converter
Pick a time and date under From; the time in IST appears under To, with your own local time underneath. The date matters around clock changes, so set it for the day you mean. ⇄ swaps the two zones, Now goes back to the current time, and either zone can be changed to any city. The planner below lines up the whole day in both places and in yours.
Handy for
- Calls between the UK and teams in India
- Converting GMT/UTC timestamps to Indian time
- Cricket and other live events listed in GMT
Questions
What is the time difference between GMT and IST?
IST is 5 hours 30 minutes ahead of GMT all year.
Do GMT and IST change for daylight saving?
GMT never changes: it is UTC+0 all year. India Standard Time (IST) does not use daylight saving: it is UTC+5:30 all year.
How do I convert GMT to IST?
Add 5 hours 30 minutes. Or use the converter above: it applies the rules for the exact date you pick.
More time zone pages
Or open the full Time Zones meeting planner and world clock.