London to Bangkok
+6hLondon
BSTSOURCEBangkok
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and ICT on the World Map
The map below highlights the BST (Greenwich Mean Time) and ICT (Indochina Time) timezone regions across the globe.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •Bangkok is one of the most visited cities in the world.
- •ICT is 12 hours ahead of EST.
- •Thailand, Vietnam, and Cambodia all share ICT.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
Big Ben is actually the name of the bell inside the Elizabeth Tower, not the tower itself.
About Bangkok
WikipediaBangkok operates on Indochina Time (ICT), UTC+7. As Southeast Asia's largest economy hub, Bangkok bridges East Asian and South Asian business hours.
Bangkok is one of the world's most visited cities, with over 22 million visitors annually.
Comparing Time Zones: London and Bangkok
London runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. Bangkok runs on Indochina Time (ICT) at UTC+07:00. That puts London 6 hours ahead of Bangkok — a difference of +6h at the current offsets.
In practice, when it is 9:00 AM in London it is 3:00 PM in Bangkok. Midnight in London is 6:00 AM in Bangkok.London observes daylight saving time while Bangkok does not, so the gap narrows or widens by an hour part of the year.
London to Bangkok time conversion table
| London (BST) | Bangkok (ICT) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | same day |
| 6:00 AM | 12:00 PM | same day |
| 7:00 AM | 1:00 PM | same day |
| 8:00 AM | 2:00 PM | same day |
| 9:00 AM | 3:00 PM | same day |
| 12:00 PM | 6:00 PM | same day |
| 3:00 PM | 9:00 PM | same day |
| 5:00 PM | 11:00 PM | same day |
| 6:00 PM | 12:00 AM | next day |
| 9:00 PM | 3:00 AM | next day |
Why people convert London to Bangkok time
- Scheduling a call from London to Bangkok: a 10:00 AM start in London lands at 4:00 PM in Bangkok, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both London and Bangkok are inside the 9-to-5 working day between 9:00 AM and 11:00 AM BST time (3:00 PM–5:00 PM ICT). That is roughly 2 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in London is 2:00 AM in Bangkok makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a +6h gap is not.
- Block 9:00 AM–11:00 AM BST as the recurring meeting window if you work primarily from London and need Bangkok colleagues present.
- London: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +6h gap.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
About ICT (Indochina Time)
Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.
Best time to call between London and Bangkok
Both London and Bangkok sit inside the 9 AM – 5 PM working day between 9:00 AM–11:00 AM BST, which is 3:00 PM–5:00 PM ICT. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
London and Bangkok overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
London is 6 hours ahead of Bangkok (BST UTC+01:00 → ICT UTC+07:00). The shared working window is 9:00 AM–11:00 AM BST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Bangkok
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between London and Bangkok?
London (BST, UTC+01:00) is 6 hours ahead of Bangkok (ICT, UTC+07:00). The gap is currently +6h.
How do I convert London time to Bangkok time?
Add +6h to London local time. For example, 9:00 AM in London is 3:00 PM in Bangkok.
What time is it in Bangkok right now?
Bangkok uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h offset from London.
What is the best time to call Bangkok from London?
Call between 9:00 AM and 11:00 AM BST — that maps to 3:00 PM–5:00 PM ICT and keeps both parties inside the working day.
Which is ahead, London or Bangkok?
London is 6 hours ahead of Bangkok. When it is 12:00 PM in London it is 6:00 PM in Bangkok.
Do London and Bangkok use different time zones?
London (UK) uses BST at UTC+01:00, while Bangkok (Thailand) uses ICT at UTC+07:00. The IANA identifiers are Europe/London and Asia/Bangkok.
Does daylight saving time affect the London–Bangkok difference?
Yes at the moment: London is on daylight saving time and Bangkok is not, so the +6h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share London's time zone?
BST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use BST, London's zone?
BST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between London and Bangkok?
Not normally. The +6h gap only pushes the date over for late-evening times.
What is the time difference between London and Bangkok?
Bangkok is +6h from London.
What timezone is London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
What timezone is Bangkok in?
Bangkok operates on Indochina Time (ICT), UTC+7. As Southeast Asia's largest economy hub, Bangkok bridges East Asian and South Asian business hours.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What are the business hours in Bangkok?
Standard business hours in Bangkok are 8:30 AM - 5:30 PM ICT.
What is the best time to schedule a call between London and Bangkok?
The best overlap for a call is when both cities are in business hours. London works 9:00 AM - 5:00 PM GMT and Bangkok works 8:30 AM - 5:30 PM ICT (+6h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in London and Bangkok?
London uses GBP (£) while Bangkok uses THB (฿). Check current exchange rates when planning travel or business between these cities.
How do London and Bangkok compare in size?
London has a population of approximately 8.8 million (metro: 14.8 million), while Bangkok has approximately 8.3 million (metro: 14.6 million).
What are the major landmarks in London and Bangkok?
London is known for Big Ben, Tower Bridge, Buckingham Palace. Bangkok is famous for Grand Palace, Wat Arun, Wat Pho.
Do London and Bangkok have stock exchanges?
Yes. London has the LSE (London Stock Exchange) and Bangkok has the SET (Stock Exchange of Thailand). The +6h time difference affects trading hour overlaps between these exchanges.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
Which cities are in the ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in London, what time is it in Bangkok?
When it is 12:00 AM (midnight) in London (GMT), it is +6h later in Bangkok (ICT).
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