BT to ICT Converter

Use our converter below to change times between British Time (BT) to Indochina Time (ICT). If you mixed up your time zones and would like to convert ICT to BT instead, you can find that converter here: Indochina Time to British Time Converter. And if you don't like either of our tools, then go back to see all of our time zone converters.

Convert Time

British Time

British Time (BT) is the time zone used in the United Kingdom, including cities like London and Manchester. It is the same as Greenwich Mean Time (GMT) during standard time and 1 hour ahead during daylight saving time, known as British Summer Time (BST).


  • London
  • Birmingham
  • Manchester
  • Glasgow

Indochina Time

Indochina Time (ICT) is the time zone used in some countries in Southeast Asia, including Thailand, Vietnam, and Cambodia, where cities like Bangkok and Ho Chi Minh City are located. It is 7 hours ahead of UTC and does not observe daylight saving time.


  • Bangkok
  • Ho Chi Minh City
  • Hanoi
  • Phnom Penh

How to convert time from British Time (BT) to Indochina Time (ICT)

Converting between British Time (BT) and Indochina Time (ICT) could be challenging. As companies become more global, we find ourselves in a mess of calendar invites. Time changes from BT cities like London, Birmingham, Manchester, Glasgow are 5 hour(s) apart to ICT cities like Bangkok, Ho Chi Minh City, Hanoi, Phnom Penh, holiday schedules, and the basic communication becomes a juggling act. To make it easier to understand, we'll break down the process of converting time between BT and ICT into step-by-step instructions.

Understanding British Time and Indochina Time

British Time is UTC1, which means that the local time in the British Time zone is 1 hours apart from UTC. Indochina Time is UTC7, which means that the local time in the Indochina Time zone is 7 hours apart from UTC.

Calculate the Time Difference

To convert time from British Time to Indochina Time, we first need to find the time difference between both time zones. Since British Time is UTC1 and Indochina Time is UTC7, the time difference is: 5 hour(s)

  • 5 hours = British Time's difference from UTC 7 + (Indochina Time's difference from UTC 1
  • Indochina Time has 5 hour(s) difference British Time.

Step 3: Add the Time Difference to the British Time Time

To convert a specific time from British Time to Indochina Time, we simply add the time difference (5 hours) to the British Time time. Make sure to also adjust the day if the converted time goes past midnight. Or if you are using 24-hour time or Military Time, ensure you’re using the correct attributes.

Step 4: Practice Converting Times

Now that you know the process, try converting different times from British Time to Indochina Time for practice before going to the answer page. Remember to always add the Indochina Time time difference to the British Time time.

Scheduling a meeting between British Time and Indochina Time

When scheduling a meeting between employees in the British Time and Indochina Time zones, there are several factors to consider to ensure that the meeting is convenient and productive for all participants. Here's a detailed breakdown of what you should consider before scheduling across time zones:

  • Convert Time Difference: As we've discussed earlier, Indochina Time is 5 ahead of British Time. It's crucial to take this time difference into account when scheduling a meeting to avoid scheduling conflicts or creating meetings at odd or inappropriate hours. In my experience, accidentally scheduling a meeting a 4am is awkward.
  • Overlapping Working Hours: To find a suitable time for the meeting, you’ll need to identify the overlapping working hours between the two time zones. For example, if employees in both zones work from 9:00 AM to 5:00 PM local time, the overlapping hours could be between 9:00 AM and 11:00 AM British Time but 5 hours different to Indochina Time. Be upfront with Indochina Time employees to find the right time.
  • Consideration of Local Holidays: Be mindful of local British Time and Indochina Time holidays, festivals, or observances in both time zones. These events might affect employee availability or working hours. Check local calendars for both the British Time and Indochina Time zones to avoid scheduling conflicts.
  • Communicate Time Zone Differences: Clearly communicate the meeting time in both British Time and Indochina Time to avoid confusion. Using a tool like an online meeting planner or time zone converter can help simplify the process and ensure accuracy.

Converting time zones across other countries

The process of converting time between two time zones is similar regardless of the countries involved. You'll need to determine the time difference between the two zones and add it to the time in the first zone. Keep in mind that some countries may observe daylight saving time or have different time zones within the country. It's important to double-check the time difference before scheduling any meetings or events.