Time difference
Bangkok to Kolkata Time Difference
Kolkata is 1 hour and 30 minutes behind Bangkok — when it's 12:00 PM in Bangkok, it's 10:30 AM in Kolkata. (Bangkok (Asia/Bangkok, ICT); Kolkata (Asia/Kolkata, IST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Kolkata is 1 hour and 30 minutes behind Bangkok. The best window for a call is 10:30 AM–5 PM in Bangkok, which is 9 AM–3:30 PM in Kolkata — an overlap of 6 hours and 30 minutes inside 9 AM–5 PM on both sides. Bangkok and Kolkata change their clocks together (or don't change at all), so the time difference between them stays the same all year.
- When it's 9:00 AM in Bangkok, it's 7:30 AM in Kolkata.
- When it's 9:00 AM in Kolkata, it's 10:30 AM in Bangkok.
Kolkata is currently 1 hour and 30 minutes behind Bangkok.
Interactive converter
12:00PM
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Best times to meet
The 9 AM – 5 PM business windows in Bangkok and Kolkata overlap for 6 hours and 30 minutes. 10:30 AM–5 PM in Bangkok is 9 AM–3:30 PM in Kolkata. Aim somewhere in the middle of that window so neither side starts cold or finishes drained.
Quick conversion table
| Bangkok | Kolkata |
|---|---|
| 12 AM | 10:30 PM (prev day) |
| 1 AM | 11:30 PM (prev day) |
| 2 AM | 12:30 AM |
| 3 AM | 1:30 AM |
| 4 AM | 2:30 AM |
| 5 AM | 3:30 AM |
| 6 AM | 4:30 AM |
| 7 AM | 5:30 AM |
| 8 AM | 6:30 AM |
| 9 AM | 7:30 AM |
| 10 AM | 8:30 AM |
| 11 AM | 9:30 AM |
| 12 PM | 10:30 AM |
| 1 PM | 11:30 AM |
| 2 PM | 12:30 PM |
| 3 PM | 1:30 PM |
| 4 PM | 2:30 PM |
| 5 PM | 3:30 PM |
| 6 PM | 4:30 PM |
| 7 PM | 5:30 PM |
| 8 PM | 6:30 PM |
| 9 PM | 7:30 PM |
| 10 PM | 8:30 PM |
| 11 PM | 9:30 PM |
Daylight saving
The time difference between these two cities stays the same over the next twelve months — neither zone is changing for daylight saving in that window.
- Bangkok does not observe daylight saving time.
- Kolkata does not observe daylight saving time.
Frequently asked questions
- Is Kolkata ahead of or behind Bangkok?
- Kolkata is 1 hour and 30 minutes behind Bangkok.
- How many hours behind Bangkok is Kolkata?
- Kolkata is 1 hour and 30 minutes behind Bangkok.
- What time is 9 AM in Bangkok in Kolkata?
- 9:00 AM in Bangkok is 7:30 AM in Kolkata.
- What time is noon in Bangkok in Kolkata?
- 12:00 PM in Bangkok is 10:30 AM in Kolkata.
- What time is 5 PM in Bangkok in Kolkata?
- 5:00 PM in Bangkok is 3:30 PM in Kolkata. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Bangkok in Kolkata?
- 3:00 PM in Bangkok is 1:30 PM in Kolkata.
- Is Bangkok currently observing daylight saving time?
- Bangkok does not observe daylight saving time — its UTC offset stays the same all year.
- Is Kolkata currently observing daylight saving time?
- Kolkata does not observe daylight saving time — its UTC offset stays the same all year.
- Do Bangkok and Kolkata observe daylight saving?
- The time difference between these two cities stays the same over the next twelve months — neither zone is changing for daylight saving in that window.
- When is the best time to call Kolkata from Bangkok?
- Aim for 10:30 AM–5 PM in Bangkok, which is 9 AM–3:30 PM in Kolkata.
- When is the best time to call Bangkok from Kolkata?
- Aim for 9 AM–3:30 PM in Kolkata, which is 10:30 AM–5 PM in Bangkok.
- Bangkok (ICT) to Kolkata (IST) — how do I convert quickly?
- Subtract 1 hour and 30 minutes from Bangkok local time to get Kolkata local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
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