Bangkok to IST
Bangkok is 1 hour and 30 minutes ahead of India Standard Time.
Times may vary due to daylight saving time.Quick answer. IST is 1 hour and 30 minutes behind Bangkok, and that gap never changes. Neither Bangkok nor IST observes daylight saving time, so the same conversion is correct on every date of the year.
Time difference
Bangkok, Thailand
ICT UTC+7:00 No DST
Bangkok and the rest of Thailand.
no DST
India Standard Time (IST)
IST UTC+5:30 No DST
Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad.
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
Bangkok to IST conversion table
Every hour of the day for 2026. Neither side observes daylight saving, so this table is correct on every date of the year.
| Bangkok | IST | 24-hour |
|---|---|---|
| 12 AM | 10:30 PM −1 day | 22:30 |
| 1 AM | 11:30 PM −1 day | 23:30 |
| 2 AM | 12:30 AM | 00:30 |
| 3 AM | 1:30 AM | 01:30 |
| 4 AM | 2:30 AM | 02:30 |
| 5 AM | 3:30 AM | 03:30 |
| 6 AM | 4:30 AM | 04:30 |
| 7 AM | 5:30 AM | 05:30 |
| 8 AM | 6:30 AM | 06:30 |
| 9 AM | 7:30 AM | 07:30 |
| 10 AM | 8:30 AM | 08:30 |
| 11 AM | 9:30 AM | 09:30 |
| 12 PM | 10:30 AM | 10:30 |
| 1 PM | 11:30 AM | 11:30 |
| 2 PM | 12:30 PM | 12:30 |
| 3 PM | 1:30 PM | 13:30 |
| 4 PM | 2:30 PM | 14:30 |
| 5 PM | 3:30 PM | 15:30 |
| 6 PM | 4:30 PM | 16:30 |
| 7 PM | 5:30 PM | 17:30 |
| 8 PM | 6:30 PM | 18:30 |
| 9 PM | 7:30 PM | 19:30 |
| 10 PM | 8:30 PM | 20:30 |
| 11 PM | 9:30 PM | 21:30 |
Highlighted rows are the 7 hours where a 9–6 working day in Bangkok overlaps a 9–5 working day in IST.
Popular conversion times
| Bangkok | IST |
|---|---|
| 9 AM Bangkok | 7:30 AM |
| 10 AM Bangkok | 8:30 AM |
| 11 AM Bangkok | 9:30 AM |
| 12 PM Bangkok | 10:30 AM |
| 3 PM Bangkok | 1:30 PM |
| 5 PM Bangkok | 3:30 PM |
| 6 PM Bangkok | 4:30 PM |
| 8 PM Bangkok | 6:30 PM |
Business hours and meeting times
Comparing a 9:00–18:00 working day in Bangkok against 9:00–17:00 in IST, across the whole week — a slot only counts if it lands on a working day at both ends.
Both sides work Monday to Friday, so the working weeks line up and you share 5 days.
Rows are days in Bangkok. Columns are hours of the Bangkok day.
Best recurring slot
1 PM Bangkok = 11:30 AM IST , every shared working day
Across the week that is 35 overlapping working hours . The widest day is Monday, with 7 hours.
| Day | Overlap (Bangkok) | Local (IST) | Hours |
|---|---|---|---|
| Monday | 11 AM – 6 PM | 9:30 AM – 4:30 PM | 7 |
| Tuesday | 11 AM – 6 PM | 9:30 AM – 4:30 PM | 7 |
| Wednesday | 11 AM – 6 PM | 9:30 AM – 4:30 PM | 7 |
| Thursday | 11 AM – 6 PM | 9:30 AM – 4:30 PM | 7 |
| Friday | 11 AM – 6 PM | 9:30 AM – 4:30 PM | 7 |
| Saturday | Bangkok weekend | — | — |
| Sunday | Bangkok weekend | — | — |
Public holidays
A shared working day is only usable if neither side is on holiday — and India and IST build their calendars on different systems, so the days each loses rarely coincide.
Over the next 8 weeks you share 40 working days. 4are lost to a public holiday on one side or the other, leaving 36.
| Date | Who is off | Holiday |
|---|---|---|
| Friday, October 2, 2026 | India | Gandhi Jayanti |
| Tuesday, October 13, 2026 | Bangkok | Passing of King Bhumibol |
| Tuesday, October 20, 2026 | India | Dussehra (Vijayadashami) |
| Friday, October 23, 2026 | Bangkok | Chulalongkorn Day |
Next holidays in Bangkok
- Tuesday, October 13, 2026Passing of King Bhumibolsame date every year
- Friday, October 23, 2026Chulalongkorn Daysame date every year
- Saturday, December 5, 2026King Bhumibol's Birthdaysame date every year
- Thursday, December 10, 2026Constitution Daysame date every year
- Thursday, December 31, 2026New Year's Evesame date every year
Thai public holidays. Buddhist holy days follow the lunar calendar and are not included.
Next holidays in India
- Friday, October 2, 2026Gandhi Jayantisame date every year
- Tuesday, October 20, 2026Dussehra (Vijayadashami)partialpublished date
- Sunday, November 8, 2026Diwalipublished date
- Monday, November 9, 2026Diwalipublished date
- Friday, December 25, 2026Christmas Daypartialsame date every year
India has three national holidays on which the whole country closes. Everything else is either a central-government gazetted holiday that individual employers choose to observe, or a state holiday. Festival dates follow lunisolar calendars and move every year, so they are listed explicitly rather than derived.
Holiday dates for Bangkok and elsewhere come from a dataset last refreshed on 2026-09-12 (date.nager.at plus curated national calendars). Lunar dates — Eid, Chinese New Year, the Jewish holidays — are predicted and can move by a day once officially announced. Regional, state and employer-specific holidays are not included. Confirm anything you are booking a flight around.
About this conversion
no DST
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
Frequently asked questions
What is the time difference between Bangkok and IST?
IST is 1 hour and 30 minutes behind Bangkok, on every date of the year. Neither side observes daylight saving time.
What time is 9 AM Bangkok in IST?
9:00 AM Bangkok is 7:30 AM in IST, all year round.
What is the best time for a meeting between Bangkok and IST?
Working days overlap for about 7 hours on a typical Monday: 11 AM to 6 PM Bangkok, which is 9:30 AM to 4:30 PM in IST. For a recurring invite, 1 PM Bangkok / 11:30 AM IST is the slot that works on the most days.
Does Bangkok observe daylight saving time?
No. Bangkok stays on ICT (UTC+7:00) for the whole year, with no daylight saving changeover.
How many hours a week do Bangkok and IST actually overlap?
35 hours across the week, spread over 5 working days. 1 PM Bangkok (11:30 AM IST) is the slot that works on the most days, so it is the one to put in a recurring invite.
Do public holidays in Bangkok and IST line up?
Barely. Over the next eight weeks the two sides share 40 working days, and 4 of those are a public holiday on one side or the other, leaving 36. The next holiday in IST is Gandhi Jayanti on 2026-10-02. Indian, Gulf and Western holiday calendars are built on different systems, so the days each side loses rarely coincide.
Is Bangkok ahead of IST?
Yes. Bangkok runs ahead of IST by 1 hour and 30 minutes, so a working morning in Bangkok lands the previous evening or night in IST.
Converting the other way
Looking up times starting from IST? Use the IST to Bangkok converter, which leads with IST as the starting point and is written for that reader.
Related converters
- IST to EST · Eastern Time
- IST to CST · Central Time
- IST to PST · Pacific Time
- IST to UTC · Coordinated Universal Time
- IST to GMT · Greenwich Mean Time
- IST to CET · Central European Time
- IST to GST · Gulf Standard Time
- IST to MST · Mountain Time