India time to Bangkok time

The time difference

Bangkok is 1 hour 30 minutes ahead of India all year. Neither place changes its clocks, so the difference never moves. India is always UTC+5:30, known as IST.

India time to Bangkok time

Good hours to start a call (8 am to 9 pm in both places): from 8:00 am to 7:00 pm India time. Hours that start inside office time (9 am to 6 pm) in both: 9:00 am to 4:00 pm India time.

Worked examples

All year. An office that closes at 6:00 pm in India closes when it is 7:30 pm in Bangkok. A 9:00 am start in Bangkok is 7:30 am in India, and its 6:00 pm finish is 4:30 pm in India. A message sent at 10:30 pm from India lands at 12:00 am the next day in Bangkok.

When the date is different

Bangkok is ahead of India, so for 1 hour 30 minutes of every day the calendar date differs: from 10:30 pm India time until midnight, Bangkok has already moved to the next day.

Why the gap is what it is

Indian Standard Time follows the sun at longitude 82.5° east. The zone that Bangkok belongs to has its largest city, Hanoi, at about 105.8° east. The sun crosses the sky between those two lines in about 1 hour 33 minutes. Clock time rounds that to a tidy figure: 1 hour 30 minutes. The two figures differ because every country picks a round offset that suits its whole territory, and some add summer time on top.

Rows marked in colour fall between 8 am and 9 pm in both places. Dates are from the IANA time zone database 2026f.

More

Read about time in Bangkok or time in India. Other conversions from India: New York, Chicago, Denver, Los Angeles, Toronto, London, Paris, Berlin, Moscow, Dubai, Riyadh, Doha, Kuwait, Karachi, Kathmandu, Dhaka, Colombo, Singapore, Kuala Lumpur, Hong Kong, Shanghai, Tokyo, Seoul, Sydney, Melbourne, Perth, Auckland, Johannesburg, Nairobi.