Delhi to London
-5h 30mDelhi
ISTSOURCELondon
GMTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and GMT on the World Map
The map below highlights the IST (India Standard Time) and GMT (Greenwich Mean Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
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 Delhi
WikipediaDelhi operates on India Standard Time (IST), UTC+5:30. As India's capital, Delhi time is synchronized with Mumbai and India's National Stock Exchange.
The city has been continuously inhabited for over 5,000 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.
Everything You Need to Know About Delhi and London Time
Delhi, India operates on the India Standard Time (UTC+05:30). London, UK uses Greenwich Mean Time (UTC+00:00).
The time difference between Delhi and London is 330 minutes (+5h 30m). When it's noon in Delhi, it's 05:30 AM in London.
Why Convert Delhi to London Time?
Navigating the time gap between Delhi and London requires careful planning. With a difference of 5.5 hours, finding a suitable time for both locations is essential for effective collaboration. This tool simplifies the process, allowing you to instantly see the corresponding time in London.
Pro Tip: If you frequently communicate with people in London from Delhi, consider adding a dual-clock widget to your phone or computer to keep track of the 5.5-hour difference at a glance.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
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 Delhi 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 Delhi would be:
- London 9:00 AM = Delhi 03:30 PM
- London 12:00 PM = Delhi 06:30 PM
- London 5:00 PM = Delhi 11:30 PM
Business Hours Overlap
Delhi and London have a partial business hours overlap. The best window for meetings and calls is when both locations are in their working hours.
As a final note, managing the -5h 30m difference between Delhi and London is simple with the right tools. Keep this page handy for all your future time conversion needs.
🕐 Daylight Saving Time Info
Delhi
Does not observe DST
London
❄ Currently in Standard Time
Standard: UTC+00:00 · DST: UTC+01:00
Clocks spring forward on Sun, Mar 29, 2026
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 Delhi and London?
London is -5h 30m from Delhi.
What timezone is Delhi in?
Delhi operates on India Standard Time (IST), UTC+5:30. As India's capital, Delhi time is synchronized with Mumbai and India's National Stock Exchange.
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 Delhi?
Standard business hours in Delhi are 9:30 AM - 5:30 PM IST.
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 Delhi and London?
The best overlap for a call is when both cities are in business hours. Delhi works 9:30 AM - 5:30 PM IST and London works 9:00 AM - 5:00 PM GMT (-5h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Delhi and London?
Delhi uses INR (₹) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Delhi and London compare in size?
Delhi has a population of approximately 11 million (metro: 32.9 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Delhi and London?
Delhi is known for India Gate, Red Fort, Qutub Minar. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Delhi and London have stock exchanges?
Yes. Delhi has the NSE (National Stock Exchange) and London has the LSE (London Stock Exchange). The -5h 30m time difference affects trading hour overlaps between these exchanges.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
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 Delhi, what time is it in London?
When it is 12:00 AM (midnight) in Delhi (IST), it is -5h 30m later in London (GMT).
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