IST to GMT
Converting a fixed time. Asia/Kolkata → UTC
11:00 pm in IST is
5:30 pm in GMT.
23:00 → 17:30 on a 24-hour clock ·
IST → UTC
IST now
1:07am
IST · UTC+5:30
Asia/Kolkata
Clocks here do not change — this zone stays on the same offset all year.
GMT now
7:37pm
UTC · UTC+0
UTC
Clocks here do not change — this zone stays on the same offset all year.
Convert a specific time minutes work, not just whole hours
Hour by hour
| IST | GMT | 24h | Good to call? |
|---|---|---|---|
| 12am | 6pm Thu | 00:00 → 18:30 | asleep in IST |
| 1am now | 7pm Thu | 01:00 → 19:30 | asleep in IST |
| 2am | 8pm Thu | 02:00 → 20:30 | asleep in IST |
| 3am | 9pm Thu | 03:00 → 21:30 | asleep in IST |
| 4am | 10pm Thu | 04:00 → 22:30 | asleep in GMT |
| 5am | 11pm Thu | 05:00 → 23:30 | asleep in GMT |
| 6am | 12am | 06:00 → 00:30 | asleep in GMT |
| 7am | 1am | 07:00 → 01:30 | asleep in GMT |
| 8am | 2am | 08:00 → 02:30 | asleep in GMT |
| 9am | 3am | 09:00 → 03:30 | asleep in GMT |
| 10am | 4am | 10:00 → 04:30 | asleep in GMT |
| 11am | 5am | 11:00 → 05:30 | asleep in GMT |
| 12pm | 6am | 12:00 → 06:30 | asleep in GMT |
| 1pm | 7am | 13:00 → 07:30 | awake, not at work |
| 2pm | 8am | 14:00 → 08:30 | awake, not at work |
| 3pm | 9am | 15:00 → 09:30 | both at work |
| 4pm | 10am | 16:00 → 10:30 | both at work |
| 5pm | 11am | 17:00 → 11:30 | awake, not at work |
| 6pm | 12pm | 18:00 → 12:30 | awake, not at work |
| 7pm | 1pm | 19:00 → 13:30 | awake, not at work |
| 8pm | 2pm | 20:00 → 14:30 | awake, not at work |
| 9pm | 3pm | 21:00 → 15:30 | awake, not at work |
| 10pm | 4pm | 22:00 → 16:30 | asleep in IST |
| 11pm | 5pm | 23:00 → 17:30 | asleep in IST |
Call times
Both places are at work between 3pm and 17:00 in Kolkata — 9am to 10am at the other end.
12am
6pm
6pm
1am
7pm
7pm
2am
8pm
8pm
3am
9pm
9pm
4am
10pm
10pm
5am
11pm
11pm
6am
12am
12am
7am
1am
1am
8am
2am
2am
9am
3am
3am
10am
4am
4am
11am
5am
5am
12pm
6am
6am
1pm
7am
7am
2pm
8am
8am
3pm
9am
9am
4pm
10am
10am
5pm
11am
11am
6pm
12pm
12pm
7pm
1pm
1pm
8pm
2pm
2pm
9pm
3pm
3pm
10pm
4pm
4pm
11pm
5pm
5pm
both at work
work hours here
awake
asleep
Questions people ask
What time is it in GMT when it is 11:00 pm in IST?
5:30 pm in GMT the same day.
How many hours ahead is GMT of IST?
GMT is 5 hours 30 minutes behind IST. Neither place changes its clocks, so that gap is the same all year. The table on this page is recalculated for today, so it is already correct for the current season.
What is the best time to call between IST and GMT?
Both places are at work between 3pm and 17:00 in Kolkata — 9am to 10am at the other end.