Toronto to London
+4hToronto
ESTSOURCELondon
GMTGreen rows indicate typical business hours (9 AM - 5 PM)
EST and GMT on the World Map
The map below highlights the EST (Eastern Standard Time) and GMT (Greenwich Mean Time) timezone regions across the globe.
EST – Eastern Standard Time
UTC-05:00Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.
- •EST is the most widely used time zone in the United States by population.
- •The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
- •23 US states are fully or partially in the Eastern Time Zone.
- •EST was established by the Standard Time Act of 1918.
- •Over 47% of the US population lives in the Eastern Time Zone.
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.
About Toronto
WikipediaToronto shares Eastern Time (EST/EDT) with New York. As Canada's largest city and financial center, Toronto's TSX is among North America's largest stock exchanges.
CN Tower was the world's tallest free-standing structure for 32 years.
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.
London was the first city to have an underground railway, opening in 1863.
Toronto to London Time Difference – Complete Guide
Toronto, Canada operates on the Eastern Standard Time (UTC-05:00). London, UK uses Greenwich Mean Time (UTC+00:00).
The time difference between Toronto and London is 240 minutes (+4h). When it's noon in Toronto, it's 04:00 PM in London.
Why Convert Toronto to London Time?
When planning a meeting or scheduling a call between Toronto and London, it's crucial to account for the 4-hour time difference. Whether you're coordinating with remote teams, calling family, or setting up an international conference, knowing the exact time in London helps avoid missed connections.
Pro Tip: If you frequently communicate with people in London from Toronto, consider adding a dual-clock widget to your phone or computer to keep track of the 4-hour difference at a glance.
About EST (Eastern Standard Time)
Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.
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.
Best Time to Call Between Toronto and London
If you want to reach someone in London during standard business hours (9 AM – 5 PM GMT), the best time to call from Toronto would be:
- London 9:00 AM = Toronto 05:00 AM
- London 12:00 PM = Toronto 08:00 AM
- London 5:00 PM = Toronto 01:00 PM
Business Hours Overlap
Toronto and London have a partial business hours overlap. The best window for meetings and calls is when both locations are in their working hours.
Ultimately, understanding the +4h difference between Toronto and London empowers you to coordinate better. Whether for business or personal reasons, this tool ensures you're always on time.
🕐 Daylight Saving Time Info
Toronto
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
London
❄ Currently in Standard Time
Standard: UTC+00:00 · DST: UTC+01:00
Clocks spring forward on Sun, Mar 29, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
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 Toronto and London?
London is +4h from Toronto.
What timezone is Toronto in?
Toronto shares Eastern Time (EST/EDT) with New York. As Canada's largest city and financial center, Toronto's TSX is among North America's largest stock exchanges.
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 are the business hours in Toronto?
Standard business hours in Toronto are 9:00 AM - 5:00 PM EST.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What is the best time to schedule a call between Toronto and London?
The best overlap for a call is when both cities are in business hours. Toronto works 9:00 AM - 5:00 PM EST and London works 9:00 AM - 5:00 PM GMT (+4h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Toronto and London?
Toronto uses CAD (C$) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Toronto and London compare in size?
Toronto has a population of approximately 2.9 million (metro: 6.3 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Toronto and London?
Toronto is known for CN Tower, Royal Ontario Museum, Ripley's Aquarium. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Toronto and London have stock exchanges?
Yes. Toronto has the TSX (Toronto Stock Exchange) and London has the LSE (London Stock Exchange). The +4h time difference affects trading hour overlaps between these exchanges.
Which countries use EST (Eastern Standard Time)?
EST is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, and 6 more countries.
Does EST observe daylight saving time?
Yes, EST switches to EDT during summer months.
What are some interesting facts about EST?
EST is the most widely used time zone in the United States by population. The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
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.
When is it midnight in Toronto, what time is it in London?
When it is 12:00 AM (midnight) in Toronto (EST), it is +4h later in London (GMT).
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