Colombo to Bangkok Time
IST to ICT Converter — 9 AM IST is 10:30 AM ICT
Colombo is 1 hours and 30 minutes behind Bangkok. Convert any time between Colombo (IST) and Bangkok (ICT) instantly.
Colombo
Sri Lanka
Bangkok
Thailand
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Time Zone Comparison
Colombo to Bangkok Time Conversion Table
| Colombo (IST) | Bangkok (ICT) |
|---|---|
| 12:00 AM | 1:30 AM |
| 2:00 AM | 3:30 AM |
| 4:00 AM | 5:30 AM |
| 6:00 AM | 7:30 AM |
| 8:00 AM | 9:30 AM |
| 10:00 AM | 11:30 AM |
| 12:00 PM | 1:30 PM |
| 2:00 PM | 3:30 PM |
| 4:00 PM | 5:30 PM |
| 6:00 PM | 7:30 PM |
| 8:00 PM | 9:30 PM |
| 10:00 PM | 11:30 PM |
Colombo & Bangkok — Business & Scheduling Guide
Colombo (Sri Lanka) is a South Asian island economy with strategic Indian Ocean positioning, with key industries in tourism, tea, apparel, and IT/BPO services. Bangkok (Thailand) is a major manufacturing and tourism hub in Southeast Asia, known for automotive assembly, electronics, tourism, and agriculture. With a 1.5-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Colombo and Bangkok
With only a 1.5-hour gap, Colombo and Bangkok have generous overlapping work hours. Morning calls in the later time zone align well with mid-day in the other. Sri Lankan business hours are typically 8:30 AM–5 PM, with a growing technology outsourcing sector. Thai business hours are typically 8:30 AM–5:30 PM, with a culture that values harmony and respect in professional settings. Most teams find that late morning to early afternoon offers the widest window for collaboration.
Daylight Saving Time Considerations
Neither Colombo nor Bangkok observes Daylight Saving Time — Colombo stays on IST and Bangkok stays on ICT year-round. This makes scheduling between these two cities simpler, as the 1.5-hour time difference remains constant throughout the year with no DST surprises.
Collaboration Tools & Workflow
Teams working between Colombo and Bangkok enjoy strong real-time collaboration potential. With just a 1.5-hour time difference, daily standups, pair programming, and spontaneous video calls are all practical. Popular tools for Colombo–Bangkok teams include Slack for real-time messaging, Google Meet or Zoom for video calls, and Notion or Linear for project management. The overlapping work window is wide enough that most teams can operate nearly synchronously.
Remote Work Between Colombo & Bangkok
Colombo, a key city in Sri Lanka, and Bangkok, a key city in Thailand, are well-connected for remote work. With a manageable 1.5-hour time difference, distributed teams can maintain a near-synchronous workflow. Both cities have strong internet infrastructure, coworking spaces, and established remote work cultures. For freelancers and remote workers, this time zone pairing is ideal — you can serve clients in Bangkok from Colombo (or vice versa) without disrupting your standard workday.
IST to ICT — Quick Reference
IST (IST) stands for the timezone used in Colombo, Sri Lanka (UTC+5:30). ICT (ICT) is the timezone used in Bangkok, Thailand (UTC+7). Colombo is 1 hours and 30 minutes behind Bangkok.
To convert IST to ICT, add 1.5 hours to IST time. For example, IST 9:00 AM = ICT 10:30 AM.
Key Facts
- •Time difference: Colombo (UTC+5:30) is 1 hours and 30 minutes behind Bangkok (UTC+7).
- •Daylight Saving Time: Colombo does not observe DST (IST). Bangkok does not observe DST (ICT).
- •Regions: Colombo is located in Sri Lanka and uses the IST time zone. Bangkok is located in Thailand and uses the ICT time zone.
- •Best time to call: The best time to call between Colombo and Bangkok is 9:00 AM to 3:00 PM in Colombo time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Colombo and Bangkok?
Colombo is 1 hours and 30 minutes behind Bangkok.
What time is it in Bangkok when it's 9 AM in Colombo?
When it's 9:00 AM in Colombo, it is 10:30 AM in Bangkok.
What time is 9 PM IST in ICT?
9 PM IST (Colombo time) is 10:30 PM ICT (Bangkok time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Colombo and Bangkok?
The best time to schedule a meeting is between 9:00 AM to 3:00 PM in Colombo time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert IST to ICT?
IST (IST) is the timezone for Colombo, Sri Lanka (UTC+5:30). ICT (ICT) is the timezone for Bangkok, Thailand (UTC+7). Colombo is 1 hours and 30 minutes behind Bangkok. Quick examples: 9 AM IST = 10:30 AM ICT, 12 PM IST = 1:30 PM ICT, 3 PM IST = 4:30 PM ICT, 6 PM IST = 7:30 PM ICT.
Is Colombo ahead of or behind Bangkok?
Colombo is 1 hour 30 minutes behind Bangkok. When it's noon in Colombo, it's 1:30 PM in Bangkok.
Does Colombo or Bangkok change clocks for Daylight Saving Time?
No, Colombo does not observe DST — it stays on IST year-round. Bangkok does not observe DST — it stays on ICT year-round.
What time is noon in Colombo in Bangkok time?
When it is 12:00 PM (noon) in Colombo (IST), it is 1:30 PM in Bangkok (ICT). This is often a popular time for scheduling lunch-hour calls across the Colombo–Bangkok corridor.
What are the overlapping work hours between Colombo and Bangkok?
The overlapping work hours between Colombo and Bangkok are approximately 9:00 AM to 3:00 PM in Colombo time, when both cities are within the standard 9 AM–5 PM workday. This is the ideal window for meetings, pair programming, and real-time collaboration.
What timezone is Colombo in?
Colombo is in the IST time zone (UTC+5:30). It is located in Sri Lanka. Colombo does not observe Daylight Saving Time.
What timezone is Bangkok in?
Bangkok is in the ICT time zone (UTC+7). It is located in Thailand. Bangkok does not observe Daylight Saving Time.
How do I schedule a call between Colombo and Bangkok?
To schedule a call between Colombo and Bangkok, aim for the overlapping window of 9:00 AM to 3:00 PM in Colombo time. Use Google Calendar or Calendly with both time zones visible, share the meeting invite with the ICT time clearly noted, and always double-check the time difference — especially during DST transitions. Pro tip: include both local times in the calendar invite title (e.g., "Sync — 10 AM IST / 11:30 AM ICT").
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