BST to IST time converter
IST is 4 hours 30 minutes ahead of BST.
BST time to IST time
For Sunday 11 October 2026. Green rows fall in both places' 9 to 5.
| BST time | IST time |
|---|---|
| 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 amnext day |
| 9:00 pm | 1:30 amnext day |
| 10:00 pm | 2:30 amnext day |
| 11:00 pm | 3:30 amnext day |
Best time to call IST from BST
Both 9 to 5 working days overlap for 4 hours, from 9:00 am–1:00 pm BST time, which is 1:30 pm–5:30 pm IST time.
Does the time difference change?
Yes. Clocks change in BST on Sunday 25 October 2026. After that, iST is 5 hours 30 minutes ahead of BST.
Compare BST · IST with your time
Your own time zone comes first, then BST · IST. Add teammates or more cities, then click an hour to plan a meeting.
More conversions from BST
Questions
What is the time difference between BST and IST?
IST is 4 hours 30 minutes ahead of BST.
When is the best time to call IST from BST?
Both 9 to 5 working days overlap for 4 hours, from 9:00 am–1:00 pm BST time, which is 1:30 pm–5:30 pm IST time.
Does the time difference change?
Yes. Clocks change in BST on Sunday 25 October 2026. After that, iST is 5 hours 30 minutes ahead of BST.
Updated Sunday 11 October 2026