Convert GMT to IST
Greenwich Mean Time (GMT) to India Standard Time (IST)
Strong business ties between the UK and India -- from legacy Commonwealth corporate relationships to modern tech outsourcing in Bangalore and Pune -- drive this search. The 5.5-hour gap is manageable, though the UK's shift to BST in summer changes the offset to 4.5 hours.
When it's 12:00 PM GMT, it's 5:30 PM IST
Interactive Converter
Pick any time and date to convert between GMT and IST.
GMT to IST Conversion Table
Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.
| GMT | IST |
|---|---|
| 12:00 AM | 5:30 AM |
| 1:00 AM | 6:30 AM |
| 2:00 AM | 7:30 AM |
| 3:00 AM | 8:30 AM |
| 4:00 AM | 9:30 AM |
| 5:00 AM | 10:30 AM |
| 6:00 AM | 11:30 AM |
| 7:00 AM | 12:30 PM |
| 8:00 AM | 1:30 PM |
| 9:00 AM | 2:30 PM |
| 10:00 AM | 3:30 PM |
| 11:00 AM | 4:30 PM |
| 12:00 PM | 5:30 PM |
| 1:00 PM | 6:30 PM |
| 2:00 PM | 7:30 PM |
| 3:00 PM | 8:30 PM |
| 4:00 PM | 9:30 PM |
| 5:00 PM | 10:30 PM |
| 6:00 PM | 11:30 PM |
| 7:00 PM | 12:30 AM +1 day |
| 8:00 PM | 1:30 AM +1 day |
| 9:00 PM | 2:30 AM +1 day |
| 10:00 PM | 3:30 AM +1 day |
| 11:00 PM | 4:30 AM +1 day |
Best Meeting Window
Top meeting times for teams in GMT and IST (9 AM -- 6 PM work hours, 1-hour meeting).
All members within working hours. Everyone in mid-day range. Note: 1 timezone(s) have a DST transition within 14 days.
All members within working hours. Everyone in mid-day range. Note: 1 timezone(s) have a DST transition within 14 days.
All members within working hours. Everyone in mid-day range. Note: 1 timezone(s) have a DST transition within 14 days.
Scheduling Tips
- Schedule between 11:00 AM-2:00 PM GMT / 4:30-7:30 PM IST for the most productive overlap.
- During BST (summer), you get an extra hour -- use 10:00 AM-2:00 PM BST / 2:30-6:30 PM IST.
- Avoid late afternoon UK calls (after 3:00 PM GMT) as that pushes past 8:30 PM IST.
- Friday afternoon syncs at 12:00 PM GMT / 5:30 PM IST work well as a weekly wrap-up before the Indian weekend starts.
Time Difference & DST
IST is 5 hours 30 minutes ahead of GMT. GMT is at UTC±0 and IST is at UTC+5:30.
Upcoming DST Transitions:
The conversion table above reflects the current DST state at build time. Use the interactive converter for live, date-specific conversions.
Major Cities
Greenwich Mean Time (GMT)
- London
- Manchester
- Birmingham
India Standard Time (IST)
- Mumbai
- Delhi
- Bangalore
Frequently Asked Questions
What is the time difference between GMT and IST?
Does the GMT-IST offset change during the year?
What time is 9 AM GMT in India?
What is the best meeting time for London and India teams?
Related Guides
Find the ideal overlap window for US–India calls. Covers EST, CST, MST, and PST to IST with work-hour recommendations.
Time Zone Basics: UTC, IANA Names & How Offsets WorkA clear guide to UTC offsets, IANA time zone identifiers, and why abbreviations like EST can be ambiguous.
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