GMT to Kolkata Time Converter
IST is 5 hours 30 minutes ahead of GMT. 9:00 AM GMT = 2:30 PM IST.
IST is 5 hours 30 minutes ahead of GMT. To convert GMT to Kolkata Time, add 5 hours 30 minutes to the GMT time: 9:00 AM GMT = 2:30 PM IST.
GMT (GMT) is used in Same offset as UTC. The UK and Ireland use GMT in winter; Iceland, Ghana and Senegal all year. Kolkata Time (Kolkata time) is used in Kolkata, India.
The UK is on GMT only in winter; in summer it uses BST (UTC+1).
GMT to Kolkata Time time conversion table
GMT to Kolkata Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| GMT | Kolkata Time | Day |
|---|---|---|
| 12:00 AM GMT | 5:30 AM IST | night |
| 1:00 AM GMT | 6:30 AM IST | — |
| 2:00 AM GMT | 7:30 AM IST | — |
| 3:00 AM GMT | 8:30 AM IST | — |
| 4:00 AM GMT | 9:30 AM IST | — |
| 5:00 AM GMT | 10:30 AM IST | — |
| 6:00 AM GMT | 11:30 AM IST | — |
| 7:00 AM GMT | 12:30 PM IST | — |
| 8:00 AM GMT | 1:30 PM IST | — |
| 9:00 AM GMT | 2:30 PM IST | work hours |
| 10:00 AM GMT | 3:30 PM IST | work hours |
| 11:00 AM GMT | 4:30 PM IST | work hours |
| 12:00 PM GMT | 5:30 PM IST | — |
| 1:00 PM GMT | 6:30 PM IST | — |
| 2:00 PM GMT | 7:30 PM IST | — |
| 3:00 PM GMT | 8:30 PM IST | — |
| 4:00 PM GMT | 9:30 PM IST | — |
| 5:00 PM GMT | 10:30 PM IST | night |
| 6:00 PM GMT | 11:30 PM IST | night |
| 7:00 PM GMT | 12:30 AM IST | next day |
| 8:00 PM GMT | 1:30 AM IST | next day |
| 9:00 PM GMT | 2:30 AM IST | next day |
| 10:00 PM GMT | 3:30 AM IST | next day |
| 11:00 PM GMT | 4:30 AM IST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert GMT to Kolkata Time
Add 5 hours 30 minutes to the GMT time to get Kolkata Time.
Example: 9:00 AM GMT = 2:30 PM IST.
Across midnight: 10:00 PM GMT = 3:30 AM IST (next day). The date changes, so always check the day as well as the hour.
Time difference between GMT and Kolkata Time
The time difference between GMT and Kolkata Time is 5 hours 30 minutes all year – IST is ahead of GMT.
GMT and Kolkata Time during daylight saving time
- GMT does not observe daylight saving time; it stays on UTC+0 all year.
- Kolkata Time does not observe daylight saving time; it stays on UTC+5:30 all year.
Best time for a meeting between GMT and Kolkata Time
GMT and Kolkata Time share 2 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 11:30 AM GMT lands between 2:30 PM and 5:00 PM IST, inside working hours for both.
GMT to Kolkata Time FAQ
What is the time difference between GMT and Kolkata Time?
IST is 5 hours 30 minutes ahead of GMT all year. 9:00 AM GMT = 2:30 PM IST.
What is 9 AM GMT in Kolkata Time?
9:00 AM GMT is 2:30 PM IST.
What is 12 PM (noon) GMT in Kolkata Time?
12:00 PM GMT is 5:30 PM IST.
Is Kolkata Time ahead of or behind GMT?
IST is 5 hours 30 minutes ahead of GMT, so it is later in Kolkata Time than in GMT.
Does GMT change for daylight saving time?
No. GMT stays on the same offset all year, so conversions never shift for daylight saving time.
Does Kolkata Time change for daylight saving time?
No. Kolkata Time stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between GMT and Kolkata Time?
GMT and Kolkata Time share 2 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 11:30 AM GMT lands between 2:30 PM and 5:00 PM IST, inside working hours for both.
Related conversions
Convert Kolkata Time to GMT
Convert GMT to other time zones
Convert other time zones to Kolkata Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.