Bangkok is 1 hour and 30 minutes ahead of Kolkata. Kolkata uses Indian Standard Time (IST, UTC+5:30) while Bangkok uses Indochina Time (ICT, UTC+7). When it's 12:00 PM in Kolkata, it's 1:30 PM in Bangkok.
Neither location observes daylight saving time, so the 1 hour 30 minute difference remains constant year-round.
Best calling time: 7:30 AM - 3:30 PM Kolkata time. This corresponds to 9:00 AM - 5:00 PM in Bangkok, covering Thai business hours.
Kolkata and Bangkok are connected by direct flights taking about 2.5 hours. Both cities are important cultural and economic centers in Asia with growing tourism and business ties.