Offset
The time difference between Kolkata and Bangkok is 1.5 hours.
Kolkata (IST) is behind Bangkok (ICT).
IST: UTC+5:30
ICT: UTC+7
Neither Kolkata nor Bangkok is currently observing daylight saving time.
When to schedule
Business-hours overlap: 9 AM–4 PM in Kolkata (10 AM–5 PM in Bangkok).
Both teams are in working hours during this window on weekdays.
Suggested time: 12:00 PM Kolkata (1:30 PM Bangkok).
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Kolkata | Bangkok | Day |
|---|---|---|
| 12:00 am | 1:30 am | Same day |
| 1:00 am | 2:30 am | Same day |
| 2:00 am | 3:30 am | Same day |
| 3:00 am | 4:30 am | Same day |
| 4:00 am | 5:30 am | Same day |
| 5:00 am | 6:30 am | Same day |
| 6:00 am | 7:30 am | Same day |
| 7:00 am | 8:30 am | Same day |
| 8:00 am | 9:30 am | Same day |
| 9:00 am | 10:30 am | Same day |
| 10:00 am | 11:30 am | Same day |
| 11:00 am | 12:30 pm | Same day |
| 12:00 pm | 1:30 pm | Same day |
| 1:00 pm | 2:30 pm | Same day |
| 2:00 pm | 3:30 pm | Same day |
| 3:00 pm | 4:30 pm | Same day |
| 4:00 pm | 5:30 pm | Same day |
| 5:00 pm | 6:30 pm | Same day |
| 6:00 pm | 7:30 pm | Same day |
| 7:00 pm | 8:30 pm | Same day |
| 8:00 pm | 9:30 pm | Same day |
| 9:00 pm | 10:30 pm | Same day |
| 10:00 pm | 11:30 pm | Same day |
| 11:00 pm | 12:30 am | +1 day |
Daylight saving time
Neither Kolkata nor Bangkok observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:52 AM
- Sunset
- 6:21 PM
- Day length
- 13h 28m
- Sunrise
- 5:51 AM
- Sunset
- 6:45 PM
- Day length
- 12h 55m
Daylight overlap: 12h 23m — 4:52 AM–5:15 PM in Kolkata (6:22 AM–6:45 PM in Bangkok). Both locations are in daylight during this window.
Cities in these zones
Other cities in India Standard Time
Other cities in Indochina Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in India Standard Time
- BOM
- NMI
- DEL
- BLR
- HYD
- AMD
- MAA
- CCU
- STV
- PNQ
Airports in Indochina Time
- HAN
- BKK
- DMK
- HPH
Related conversions
Common conversions
- What is 9:00 am Kolkata in Bangkok?
- 9:00 am Kolkata is 10:30 am Bangkok.
- What is 12:00 pm Kolkata in Bangkok?
- 12:00 pm Kolkata is 1:30 pm Bangkok.
- What is 12:30 pm Kolkata in Bangkok?
- 12:30 pm Kolkata is 2:00 pm Bangkok.
- What is 2:00 pm Kolkata in Bangkok?
- 2:00 pm Kolkata is 3:30 pm Bangkok.
- What is 5:00 pm Kolkata in Bangkok?
- 5:00 pm Kolkata is 6:30 pm Bangkok.
- What is 11:30 pm Kolkata in Bangkok?
- 11:30 pm Kolkata is 1:00 am Bangkok, the next day.