IST to BST Converter
Convert time between India Standard Time (IST) and UK time (BST/GMT).
Convert a specific time
- IndiaIST, UTC+5:30
- Eastern Time – New YorkEDT, UTC-4
- Central Time – ChicagoCDT, UTC-5
- Mountain Time – DenverMDT, UTC-6
- Arizona – PhoenixMST, UTC-7
- Pacific Time – Los AngelesPDT, UTC-7
- Mexico CityCST, UTC-6
- Saskatchewan – ReginaCST, UTC-6
- UTC / GMTUTC, UTC+0
- United Kingdom – LondonBST, UTC+1
- Central Europe – Paris, BerlinCEST, UTC+2
- Gulf – DubaiGST, UTC+4
- SingaporeSGT, UTC+8
- Japan – TokyoJST, UTC+9
- Australia Eastern – SydneyAEST, UTC+10
- EST (always UTC-5)Fixed offset, no DST
- CST (always UTC-6)Fixed offset, no DST
- MST (always UTC-7)Fixed offset, no DST
- PST (always UTC-8)Fixed offset, no DST
- IndiaIST, UTC+5:30
- Eastern Time – New YorkEDT, UTC-4
- Central Time – ChicagoCDT, UTC-5
- Mountain Time – DenverMDT, UTC-6
- Arizona – PhoenixMST, UTC-7
- Pacific Time – Los AngelesPDT, UTC-7
- Mexico CityCST, UTC-6
- Saskatchewan – ReginaCST, UTC-6
- UTC / GMTUTC, UTC+0
- United Kingdom – LondonBST, UTC+1
- Central Europe – Paris, BerlinCEST, UTC+2
- Gulf – DubaiGST, UTC+4
- SingaporeSGT, UTC+8
- Japan – TokyoJST, UTC+9
- Australia Eastern – SydneyAEST, UTC+10
- EST (always UTC-5)Fixed offset, no DST
- CST (always UTC-6)Fixed offset, no DST
- MST (always UTC-7)Fixed offset, no DST
- PST (always UTC-8)Fixed offset, no DST
Time Difference
India Standard Time is 4 hours 30 minutes ahead of UK time right now.
- Now until Oct 25, 2026: India Standard Time is 4 hours 30 minutes ahead of UK time (IST → BST).
- Oct 25, 2026 – Mar 28, 2027: India Standard Time is 5 hours 30 minutes ahead of UK time (IST → GMT).
- From Mar 28, 2027: India Standard Time is 4 hours 30 minutes ahead of UK time (IST → BST).
UK time is on BST right now
Best time to call
Convenient overlapping hours on Saturday, September 19, 2026.
| IST (India Standard Time) | BST (UK time) |
|---|---|
| 1:30 PM | 9:00 AM |
| 2:30 PM | 10:00 AM |
| 3:30 PM | 11:00 AM |
These hours fall within 9 AM–5 PM in both places.
Convert another time zone Plan a meeting across IST and BSTIST to BST conversion table
For Sunday, September 20, 2026 in India Standard Time.
| IST | BST |
|---|---|
| 12:00 AM | 7:30 PM(previous day) |
| 1:00 AM | 8:30 PM(previous day) |
| 2:00 AM | 9:30 PM(previous day) |
| 3:00 AM | 10:30 PM(previous day) |
| 4:00 AM | 11:30 PM(previous day) |
| 5:00 AM | 12:30 AM |
| 6:00 AM | 1:30 AM |
| 7:00 AM | 2:30 AM |
| 8:00 AM | 3:30 AM |
| 9:00 AM | 4:30 AM |
| 10:00 AM | 5:30 AM |
| 11:00 AM | 6:30 AM |
| 12:00 PM | 7:30 AM |
| 1:00 PM | 8:30 AM |
| 2:00 PM | 9:30 AM |
| 3:00 PM | 10:30 AM |
| 4:00 PM | 11:30 AM |
| 5:00 PM | 12:30 PM |
| 6:00 PM | 1:30 PM |
| 7:00 PM | 2:30 PM |
| 8:00 PM | 3:30 PM |
| 9:00 PM | 4:30 PM |
| 10:00 PM | 5:30 PM |
| 11:00 PM | 6:30 PM |
About these time zones
India Standard Time (IST)
India Standard Time (IST) is UTC+5:30 and is used across all of India as a single time zone. India does not observe daylight saving time, so IST never changes — but its difference from places that do (like US Eastern Time) changes twice a year.
British Summer Time (BST)
British Summer Time (BST) is UTC+1, used in the United Kingdom from the last Sunday in March to the last Sunday in October. The rest of the year the UK is on Greenwich Mean Time (GMT, UTC+0). Ireland switches on the same dates to Irish Standard Time.
IST to BST FAQs
What time is it in BST when it is 9 AM IST?
On Sunday, September 20, 2026, 9:00 AM IST is 4:30 AM BST in UK time.
How many hours ahead is IST from BST?
It depends on the time of year because of daylight saving time. Now until Oct 25, 2026: India Standard Time is 4 hours 30 minutes ahead of UK time (IST → BST). Oct 25, 2026 – Mar 28, 2027: India Standard Time is 5 hours 30 minutes ahead of UK time (IST → GMT).
What is the best time for a call between IST and BST?
On Saturday, September 19, 2026, good options are 1:30 PM IST (9:00 AM BST), 2:30 PM IST (10:00 AM BST), 3:30 PM IST (11:00 AM BST). These fall within normal 9 AM–5 PM working hours in both places.
Does IST change for daylight saving time?
No. IST stays at UTC+5:30 all year.
Does BST change for daylight saving time?
The region changes: UK time switches between GMT and BST, so conversions depend on the date. BST itself always means UTC+1.