GMT to IST Converter
Convert Greenwich Mean Time (GMT) to India Standard Time (IST). Pick any date — daylight saving is applied from the IANA time zone database, so the answer is right in March and in November.
GMT to IST
GMT is 5 hours and 30 minutes behind IST.
Quick answer. IST is 5 hours and 30 minutes ahead of GMT, and that gap never changes. Neither GMT nor IST observes daylight saving time, so the same conversion is correct on every date of the year.
Time difference
Greenwich Mean Time (GMT)
GMT UTC+0:00 No DST
Winter time in the UK, Ireland, Portugal and Iceland.
GMT itself is a fixed UTC+0:00. The UK only keeps GMT in winter — from late March to late October London moves to BST (UTC+1:00), so check the BST page if you are scheduling with someone in Britain during the summer.
India Standard Time (IST)
IST UTC+5:30 No DST
Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad.
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
GMT to IST conversion table
Every hour of the day for 2026. Neither side observes daylight saving, so this table is correct on every date of the year.
| GMT | IST | 24-hour |
|---|---|---|
| 12 AM | 5:30 AM | 05:30 |
| 1 AM | 6:30 AM | 06:30 |
| 2 AM | 7:30 AM | 07:30 |
| 3 AM | 8:30 AM | 08:30 |
| 4 AM | 9:30 AM | 09:30 |
| 5 AM | 10:30 AM | 10:30 |
| 6 AM | 11:30 AM | 11:30 |
| 7 AM | 12:30 PM | 12:30 |
| 8 AM | 1:30 PM | 13:30 |
| 9 AM | 2:30 PM | 14:30 |
| 10 AM | 3:30 PM | 15:30 |
| 11 AM | 4:30 PM | 16:30 |
| 12 PM | 5:30 PM | 17:30 |
| 1 PM | 6:30 PM | 18:30 |
| 2 PM | 7:30 PM | 19:30 |
| 3 PM | 8:30 PM | 20:30 |
| 4 PM | 9:30 PM | 21:30 |
| 5 PM | 10:30 PM | 22:30 |
| 6 PM | 11:30 PM | 23:30 |
| 7 PM | 12:30 AM +1 day | 00:30 |
| 8 PM | 1:30 AM +1 day | 01:30 |
| 9 PM | 2:30 AM +1 day | 02:30 |
| 10 PM | 3:30 AM +1 day | 03:30 |
| 11 PM | 4:30 AM +1 day | 04:30 |
Highlighted rows are the 3 hours where a 9–6 working day in GMT overlaps a 9–5 working day in IST.
Popular conversion times
| GMT | IST |
|---|---|
| 9 AM GMT | 2:30 PM |
| 10 AM GMT | 3:30 PM |
| 11 AM GMT | 4:30 PM |
| 12 PM GMT | 5:30 PM |
| 3 PM GMT | 8:30 PM |
| 5 PM GMT | 10:30 PM |
| 6 PM GMT | 11:30 PM |
| 8 PM GMT | 1:30 AM+1 day |
Business hours and meeting times
Comparing a 9:00–18:00 working day in GMT against 9:00–17:00 in IST, across the whole week — a slot only counts if it lands on a working day at both ends.
Both sides work Monday to Friday, so the working weeks line up and you share 5 days.
Rows are days in GMT. Columns are hours of the GMT day.
Best recurring slot
10 AM GMT = 3:30 PM IST , every shared working day
Across the week that is 10 overlapping working hours . The widest day is Monday, with 2 hours.
| Day | Overlap (GMT) | Local (IST) | Hours |
|---|---|---|---|
| Monday | 9 AM – 11 AM | 2:30 PM – 4:30 PM | 2 |
| Tuesday | 9 AM – 11 AM | 2:30 PM – 4:30 PM | 2 |
| Wednesday | 9 AM – 11 AM | 2:30 PM – 4:30 PM | 2 |
| Thursday | 9 AM – 11 AM | 2:30 PM – 4:30 PM | 2 |
| Friday | 9 AM – 11 AM | 2:30 PM – 4:30 PM | 2 |
| Saturday | GMT weekend | — | — |
| Sunday | GMT weekend | — | — |
About this conversion
GMT itself is a fixed UTC+0:00. The UK only keeps GMT in winter — from late March to late October London moves to BST (UTC+1:00), so check the BST page if you are scheduling with someone in Britain during the summer.
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
Frequently asked questions
What is the time difference between GMT and IST?
IST is 5 hours and 30 minutes ahead of GMT, on every date of the year. Neither side observes daylight saving time.
What time is 9 AM GMT in IST?
9:00 AM GMT is 2:30 PM in IST, all year round.
What is the best time for a meeting between GMT and IST?
Working days overlap for about 2 hours on a typical Monday: 9 AM to 11 AM GMT, which is 2:30 PM to 4:30 PM in IST. For a recurring invite, 10 AM GMT / 3:30 PM IST is the slot that works on the most days.
Does GMT observe daylight saving time?
No. GMT stays on GMT (UTC+0:00) for the whole year, with no daylight saving changeover.
How many hours a week do GMT and IST actually overlap?
10 hours across the week, spread over 5 working days. 10 AM GMT (3:30 PM IST) is the slot that works on the most days, so it is the one to put in a recurring invite.
Is GMT ahead of IST?
No, it is the other way around: IST is ahead of GMT by 5 hours and 30 minutes.
Converting the other way
Looking up times starting from IST? Use the IST to GMT converter, which leads with IST as the starting point and is written for that reader.
Related converters
- IST to EST · Eastern Time
- IST to CST · Central Time
- IST to PST · Pacific Time
- IST to UTC · Coordinated Universal Time
- IST to CET · Central European Time
- IST to GST · Gulf Standard Time
- IST to MST · Mountain Time