Time in Bangkok vs Kolkata
Bangkok keeps ICT (UTC+7) and Kolkata keeps IST (UTC+5:30) today. Kolkata is 1½ hours behind Bangkok; the rows below read both clocks live.
The working day, side by side
Hours shaded in both rows are inside working hours in both cities: 09:00–17:00 in Kolkata (10:00–18:00 your time).
| City | 00:00 in Bangkok | 01:00 in Bangkok | 02:00 in Bangkok | 03:00 in Bangkok | 04:00 in Bangkok | 05:00 in Bangkok | 06:00 in Bangkok | 07:00 in Bangkok | 08:00 in Bangkok | 09:00 in Bangkok | 10:00 in Bangkok | 11:00 in Bangkok | 12:00 in Bangkok | 13:00 in Bangkok | 14:00 in Bangkok | 15:00 in Bangkok | 16:00 in Bangkok | 17:00 in Bangkok | 18:00 in Bangkok | 19:00 in Bangkok | 20:00 in Bangkok | 21:00 in Bangkok | 22:00 in Bangkok | 23:00 in Bangkok |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bangkok—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Kolkata—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
- Working hours
- Shoulder
- Night
- Overlap
Do more with Bangkok and Kolkata
Best hours to call
10:00 in Bangkok
Inside working hours on both sides
09:00 in Kolkata
11:00 in Bangkok
Inside working hours on both sides
10:00 in Kolkata
12:00 in Bangkok
Inside working hours on both sides
11:00 in Kolkata
13:00 in Bangkok
Inside working hours on both sides
12:00 in Kolkata
Where daylight saving pulls them apart
Neither Bangkok nor Kolkata changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Kolkata of Bangkok?
Kolkata is 1½ hours behind Bangkok right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Bangkok and Kolkata?
Any hour in 10:00–18:00 Bangkok time is inside working hours in both cities.
Do Bangkok and Kolkata change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.