GMT to India
+5h 30mGMT
GMTSOURCEIndia
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
GMT and IST on the World Map
The map below highlights the GMT (Greenwich Mean Time) and IST (India 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.
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.
Everything You Need to Know About GMT and India Time
GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. India runs on India Standard Time (IST) at UTC+05:30. That puts GMT 5 hours 30 minutes ahead of India — a difference of +5h 30m at the current offsets.
In practice, when it is 9:00 AM in GMT it is 2:30 PM in India. Midnight in GMT is 5:30 AM in India. Neither zone observes daylight saving time, so the offset between them stays constant all year.
GMT to India time conversion table
| GMT (GMT) | India (IST) | Day |
|---|---|---|
| 12:00 AM | 5:30 AM | same day |
| 6:00 AM | 11:30 AM | same day |
| 7:00 AM | 12:30 PM | same day |
| 8:00 AM | 1:30 PM | same day |
| 9:00 AM | 2:30 PM | same day |
| 12:00 PM | 5:30 PM | same day |
| 3:00 PM | 8:30 PM | same day |
| 5:00 PM | 10:30 PM | same day |
| 6:00 PM | 11:30 PM | same day |
| 9:00 PM | 2:30 AM | next day |
Why people convert GMT to India time
- Scheduling a call from GMT to India: a 10:00 AM start in GMT lands at 3:30 PM in India, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both GMT and India are inside the 9-to-5 working day between 9:00 AM and 11:30 AM GMT time (2:30 PM–5:00 PM IST). That is roughly 2 hours 30 minutes of usable overlap.
- Coordinating a GMT-based team with India contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM GMT" is unambiguous; "3 PM" across a +5h 30m gap is not.
- Block 9:00 AM–11:30 AM GMT as the recurring meeting window if you work primarily from GMT and need India colleagues present.
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 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.
Best time to call between GMT and India
Both GMT and India sit inside the 9 AM – 5 PM working day between 9:00 AM–11:30 AM GMT, which is 2:30 PM–5:00 PM IST. That gives roughly 2 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
GMT and India overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
GMT is 5 hours 30 minutes ahead of India (GMT UTC+00:00 → IST UTC+05:30). The shared working window is 9:00 AM–11:30 AM GMT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
GMT
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
India
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 GMT and India?
GMT (GMT, UTC+00:00) is 5 hours 30 minutes ahead of India (IST, UTC+05:30). The gap is currently +5h 30m.
How do I convert GMT time to India time?
Add +5h 30m to GMT local time. For example, 9:00 AM in GMT is 2:30 PM in India.
What time is it in India right now?
India uses IST at UTC+05:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +5h 30m offset from GMT.
What is the best time to call India from GMT?
Call between 9:00 AM and 11:30 AM GMT — that maps to 2:30 PM–5:00 PM IST and keeps both parties inside the working day.
Which is ahead, GMT or India?
GMT is 5 hours 30 minutes ahead of India. When it is 12:00 PM in GMT it is 5:30 PM in India.
Do GMT and India use different time zones?
GMT uses GMT at UTC+00:00, while India (India) uses IST at UTC+05:30. The IANA identifiers are Europe/London and Asia/Kolkata.
Does daylight saving time affect the GMT–India difference?
Neither zone observes daylight saving time, so the +5h 30m offset between GMT and India is fixed all year.
Which other cities share GMT's time zone?
GMT also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use GMT, GMT's zone?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between GMT and India?
Not normally. The +5h 30m gap only pushes the date over for late-evening times.
What is the time difference between GMT and India?
India is +5h 30m from GMT.
What timezone is GMT in?
GMT operates on its local timezone.
What timezone is India in?
India operates on its local timezone.
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 IST timezone?
Major cities in the IST timezone include Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad.
What is the UTC offset for IST?
India Standard Time (IST) is at UTC+05:30.
What should I know about the IST timezone?
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.
When is it midnight in GMT, what time is it in India?
When it is 12:00 AM (midnight) in GMT (GMT), it is +5h 30m later in India (IST).
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