BST to IST Time Converter
Convert British Summer Time to India Standard Time instantly.
Scroll the timeline to check any hour of the day.
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How the BST to IST time difference works
IST is 4 hours 30 minutes ahead of BST. British Summer Time (BST) is the spring-to-autumn daylight time of the United Kingdom, fixed at one hour ahead of GMT.
India Standard Time (IST) is the time zone of India and Sri Lanka.
For example, 9:00 AM BST is 1:30 PM IST.
Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Time difference
4 hours 30 minutes
BST to IST conversion chart
| British Summer Time (BST) |
India Standard Time (IST) |
| 12:00 AM |
4:30 AM |
| 1:00 AM |
5:30 AM |
| 2:00 AM |
6:30 AM |
| 3:00 AM |
7:30 AM |
| 4:00 AM |
8:30 AM |
| 5:00 AM |
9:30 AM |
| 6:00 AM |
10:30 AM |
| 7:00 AM |
11:30 AM |
| 8:00 AM |
12:30 PM |
| 9:00 AM |
1:30 PM |
| 10:00 AM |
2:30 PM |
| 11:00 AM |
3:30 PM |
| 12:00 PM |
4:30 PM |
| 1:00 PM |
5:30 PM |
| 2:00 PM |
6:30 PM |
| 3:00 PM |
7:30 PM |
| 4:00 PM |
8:30 PM |
| 5:00 PM |
9:30 PM |
| 6:00 PM |
10:30 PM |
| 7:00 PM |
11:30 PM |
| 8:00 PM |
12:30 AM +1 day |
| 9:00 PM |
1:30 AM +1 day |
| 10:00 PM |
2:30 AM +1 day |
| 11:00 PM |
3:30 AM +1 day |
Best time to meet
A standard 9 to 5 workday overlaps from 9:00 AM to 12:30 PM BST (1:30 PM to 5:00 PM IST). Schedule inside that window to catch both coasts during business hours.
Cities in each time zone
British Summer Time (BST)
LondonManchesterBirminghamGlasgowLiverpoolEdinburgh
India Standard Time (IST)
MumbaiDelhiBengaluruKolkataChennaiHyderabad
BST to IST questions
Is IST ahead of or behind BST?
IST is 4 hours 30 minutes ahead of BST. So 9:00 AM BST is 1:30 PM IST, and 5:00 PM BST is 9:30 PM IST.
What time is it in IST when it is 12:00 PM BST?
When it is 12:00 PM (noon) BST in British Summer Time, it is 4:30 PM IST in India Standard Time.
How many hours difference is there between BST and IST?
There is a 4 hours 30 minutes difference. India Standard Time (IST) runs 4 hours 30 minutes ahead of British Summer Time (BST).
Do BST and IST observe daylight saving time?
Neither British Summer Time nor India Standard Time shifts its clocks for daylight saving time, so the 4 hours 30 minutes difference between them is the same all year. BST is itself the daylight-saving period of the United Kingdom: clocks there run on BST from late March to late October and return to GMT in winter.
What is the best time to schedule a meeting between BST and IST?
A standard 9-to-5 workday overlaps from 9:00 AM to 12:30 PM BST (1:30 PM to 5:00 PM IST). Scheduling inside that window keeps the call during business hours in both British Summer Time and India Standard Time.
Which cities use BST and IST?
British Summer Time (BST) covers cities such as London, Manchester, Birmingham, Glasgow, Liverpool, Edinburgh. India Standard Time (IST) covers cities such as Mumbai, Delhi, Bengaluru, Kolkata, Chennai, Hyderabad.
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