BST to IST Time Converter
Type a time in BST to see it in IST, with daylight saving handled for the date you pick. Every hour of the day is in the table below, and the meeting planner shows when both working days overlap.
In India
2:30 pmIST
9:00 am GMT on Wed 14 Jan 2026 is 2:30 pm IST the same day. India is 5 h 30 min ahead of London.
- Date there
- Wednesday 14 January 2026
- Offsets
- GMT UTC+0 · IST UTC+5:30
- Date used
- Example day: Wednesday 14 January 2026
How this works: Method, 3 sources, Checked against 1 worked example,
How this works
Method
Here BST means UK time, GMT (UTC+0) in its winter and BST (UTC+1) in its summer, as kept in London; IST means India Standard Time, UTC+5:30 all year. So IST is 5 h 30 min ahead of GMT and 4 h 30 min ahead of BST. Two 9-to-5 working days overlap by 2 h 30 min in January and 3 h 30 min in July. Full method
Sources
How it’s tested
One worked example for this page is checked by automated tests before every release: given the inputs, the tool must show the expected answer.
Changes
- 15 more conversion pages (IST to CST, BST to IST, SGT, GST, JST, MST and more); each conversion page shows all 24 hours with working hours shaded, and its best meeting times.
- The pickers find about a thousand more cities, states and countries (Seattle, Bangalore, Texas), and each conversion page names the next clock change on either side.
- The converter opens on the time now, live, with a Now choice beside the time, and the main converter starts from your own time zone.
- First published, with a world clock, pages for the time in 31 places and 15 common conversions such as PST to IST.
How to convert BST to IST
Here BST means UK time, GMT (UTC+0) in its winter and BST (UTC+1) in its summer, as kept in London; IST means India Standard Time, UTC+5:30 all year. So IST is 5 h 30 min ahead of GMT and 4 h 30 min ahead of BST. Two 9-to-5 working days overlap by 2 h 30 min in January and 3 h 30 min in July.
BST to IST, or UK time to India time, is one of the most common conversions for the large British Indian community, for UK companies with offices in Bengaluru, Chennai or Gurugram, and for students in British universities. The working days overlap well: a London morning from 9:00 am falls in the Indian afternoon, so the first half of the UK day is the natural slot for meetings.
BST, British Summer Time, is UTC+1 and runs from the last Sunday in March to the last Sunday in October; in winter the UK goes back to GMT, UTC+0. This page follows London’s clock, so it uses BST in summer and GMT in winter, whatever the label says. That makes India 4 h 30 min ahead in summer and 5 h 30 min ahead in winter. A meeting fixed at 9:30 am London time is at 2:00 pm in India in summer and 3:00 pm in winter, which matters for teams in India finishing their day.
Rule of thumb: Add 4½ hours to UK time in summer and 5½ hours in winter: 10:00 am in London is 2:30 pm (BST) or 3:30 pm (GMT) in India.
IST = GMT +5:30 · IST = BST +4:30
- Britain tried keeping its clocks one hour ahead of GMT all year from 27 October 1968 to 31 October 1971, an experiment called British Standard Time. Source: IANA tz database, file europe (EU rules).
Meeting planner: best times for BST and IST
The easiest meetings fall where both working days overlap, shaded dark on the bar for each season. The lighter shading is still between 7 am and 9 pm on both clocks, so one side starts early or stays late.
January: GMT and IST
- Both at work: 9:00 am to 11:30 am GMT is 2:30 pm to 5:00 pm IST (2 h 30 min).
- Early or late for one side: 7:00 am to 9:00 am GMT is 12:30 pm to 2:30 pm IST (2 h); 11:30 am to 3:30 pm GMT is 5:00 pm to 9:00 pm IST (4 h).
July: BST and IST
- Both at work: 9:00 am to 12:30 pm BST is 1:30 pm to 5:00 pm IST (3 h 30 min).
- Early or late for one side: 7:00 am to 9:00 am BST is 11:30 am to 1:30 pm IST (2 h); 12:30 pm to 4:30 pm BST is 5:00 pm to 9:00 pm IST (4 h).
Both between 9 am and 5 pmBoth between 7 am and 9 pm
BST to IST time conversion table
Every hour of the BST day and the time in IST: the January column holds while the clocks are on GMT and IST, the July column while they are on BST and IST. The dates they switch are under the table.
| GMT / BST time | IST in January | IST in July |
|---|---|---|
| 12:00 am | 5:30 am | 4:30 am |
| 1:00 am | 6:30 am | 5:30 am |
| 2:00 am | 7:30 am | 6:30 am |
| 3:00 am | 8:30 am | 7:30 am |
| 4:00 am | 9:30 am | 8:30 am |
| 5:00 am | 10:30 am | 9:30 am |
| 6:00 am | 11:30 am | 10:30 am |
| 7:00 am | 12:30 pm | 11:30 am |
| 8:00 am | 1:30 pm | 12:30 pm |
| 9:00 am | 2:30 pm | 1:30 pm |
| 10:00 am | 3:30 pm | 2:30 pm |
| 11:00 am | 4:30 pm | 3:30 pm |
| 12:00 pm | 5:30 pm | 4:30 pm |
| 1:00 pm | 6:30 pm | 5:30 pm |
| 2:00 pm | 7:30 pm | 6:30 pm |
| 3:00 pm | 8:30 pm | 7:30 pm |
| 4:00 pm | 9:30 pm | 8:30 pm |
| 5:00 pm | 10:30 pm | 9:30 pm |
| 6:00 pm | 11:30 pm | 10:30 pm |
| 7:00 pm | 12:30 am (next day) | 11:30 pm |
| 8:00 pm | 1:30 am (next day) | 12:30 am (next day) |
| 9:00 pm | 2:30 am (next day) | 1:30 am (next day) |
| 10:00 pm | 3:30 am (next day) | 2:30 am (next day) |
| 11:00 pm | 4:30 am (next day) | 3:30 am (next day) |
Shaded: 9 am to 5 pm on that clock. Where a row is shaded on both sides, both are at work.
When the BST–IST difference changes next
| Date | What happens | Then |
|---|---|---|
| Sun 25 Oct 2026 | London falls back (GMT) | IST is 5 h 30 min ahead of GMT |
| Sun 28 Mar 2027 | London springs forward (BST) | IST is 4 h 30 min ahead of BST |
Frequently Asked Questions
What is 9 am BST in IST?
In January, 9:00 am GMT is 2:30 pm IST. In July, 9:00 am BST is 1:30 pm IST.
What time is 9 am UK time in India?
9:00 am in the UK is 1:30 pm in India from late March to late October (BST) and 2:30 pm in winter (GMT).
Is BST the same as GMT?
No. BST is British Summer Time, GMT+1, used from the last Sunday in March to the last Sunday in October. GMT is the UK’s winter time. Here BST also stands for UK time in general, so the page switches to GMT for winter dates.