London to SGT
+7hLondon
BSTSOURCESGT
SGTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and SGT on the World Map
The map below highlights the BST (Greenwich Mean Time) and SGT (Singapore Standard 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.
SGT – Singapore Standard Time
UTC+08:00Singapore Standard Time (SGT) is the time zone for Singapore, 8 hours ahead of UTC.
- •Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00).
- •Singapore does not observe daylight saving time.
- •The Singapore Exchange (SGX) operates on SGT.
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.
Understanding the +7h Gap: London vs SGT
London runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. SGT runs on Singapore Standard Time (SGT) at UTC+08:00. That puts London 7 hours ahead of SGT — a difference of +7h at the current offsets.
In practice, when it is 9:00 AM in London it is 4:00 PM in SGT. Midnight in London is 7:00 AM in SGT.London observes daylight saving time while SGT does not, so the gap narrows or widens by an hour part of the year.
London to SGT time conversion table
| London (BST) | SGT (SGT) | Day |
|---|---|---|
| 12:00 AM | 7:00 AM | same day |
| 6:00 AM | 1:00 PM | same day |
| 7:00 AM | 2:00 PM | same day |
| 8:00 AM | 3:00 PM | same day |
| 9:00 AM | 4:00 PM | same day |
| 12:00 PM | 7:00 PM | same day |
| 3:00 PM | 10:00 PM | same day |
| 5:00 PM | 12:00 AM | next day |
| 6:00 PM | 1:00 AM | next day |
| 9:00 PM | 4:00 AM | next day |
Why people convert London to SGT time
- Scheduling a call from London to SGT: a 10:00 AM start in London lands at 5:00 PM in SGT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both London and SGT are inside the 9-to-5 working day between 9:00 AM and 10:00 AM BST time (4:00 PM–5:00 PM SGT). That is roughly 1 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in London is 3:00 AM in SGT 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 +7h gap is not.
- Block 9:00 AM–10:00 AM BST as the recurring meeting window if you work primarily from London and need SGT 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 +7h 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 SGT (Singapore Standard Time)
Singapore Standard Time (SGT) is used in Singapore year-round. Singapore does not observe daylight saving time. Despite being geographically close to the UTC+07:00 zone, Singapore uses UTC+08:00 to align with major trading partners like China, Hong Kong, and Malaysia. Singapore is a major global financial hub.
Best time to call between London and SGT
Both London and SGT sit inside the 9 AM – 5 PM working day between 9:00 AM–10:00 AM BST, which is 4:00 PM–5:00 PM SGT. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
London and SGT overlap for only 60 minutes (9:00 AM–10:00 AM BST), so meetings have to be booked precisely.
London is 7 hours ahead of SGT (BST UTC+01:00 → SGT UTC+08:00). The shared working window is 9:00 AM–10:00 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
SGT
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 SGT?
London (BST, UTC+01:00) is 7 hours ahead of SGT (SGT, UTC+08:00). The gap is currently +7h.
How do I convert London time to SGT time?
Add +7h to London local time. For example, 9:00 AM in London is 4:00 PM in SGT.
What time is it in SGT right now?
SGT uses SGT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +7h offset from London.
What is the best time to call SGT from London?
Call between 9:00 AM and 10:00 AM BST — that maps to 4:00 PM–5:00 PM SGT and keeps both parties inside the working day.
Which is ahead, London or SGT?
London is 7 hours ahead of SGT. When it is 12:00 PM in London it is 7:00 PM in SGT.
Do London and SGT use different time zones?
London (UK) uses BST at UTC+01:00, while SGT uses SGT at UTC+08:00. The IANA identifiers are Europe/London and Asia/Singapore.
Does daylight saving time affect the London–SGT difference?
Yes at the moment: London is on daylight saving time and SGT is not, so the +7h 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 SGT?
Not normally. The +7h gap only pushes the date over for late-evening times.
What is the time difference between London and SGT?
SGT is +7h 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 SGT in?
SGT operates on its local timezone.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
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 SGT timezone?
Major cities in the SGT timezone include Singapore.
What is the UTC offset for SGT?
Singapore Standard Time (SGT) is at UTC+08:00.
What should I know about the SGT timezone?
Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00). Singapore does not observe daylight saving time.
When is it midnight in London, what time is it in SGT?
When it is 12:00 AM (midnight) in London (GMT), it is +7h later in SGT (SGT).
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