BST: British Time
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BST to IST: convert British Time to India Standard Time
On January 15, 2026, IST is 5:30 hours ahead of BST. On July 15 it is 4:30 hours ahead of BST.
These are dated examples. Select your actual date below: regions can change clocks on different dates, so the gap between the examples may differ.
The United Kingdom uses GMT in winter and BST (British Summer Time) in summer. BST also abbreviates Bangladesh Standard Time (UTC+6).
IST also abbreviates Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). These pages use the Indian meaning.
One instant, two local clocks
Drag one day across both zones
Shared instant12:00 UTC
Difference nowIST is 5:30 hours ahead
BSTBritish Time
12:00Thu, Jan 15
ISTIndia Standard Time
17:30Thu, Jan 15
Approximate daylight 09:00 to 17:00 Selected local time
Both lanes show the same instant. Local dates, daylight, and offsets come from each IANA zone on the selected date, so daylight saving changes are included.
Right now
IST: India Standard Time
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Local times come from your browser's IANA time zone data.
BST to IST hour by hour
This table uses January 15 and July 15, 2026, at noon UTC. These are sample dates, not season-wide rules. Northern and southern regions follow different schedules, and transition weeks can have another gap. Use the date control above for the day you are planning.
| BST | IST (Jan 15) | IST (Jul 15) |
|---|---|---|
| 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) |
Scheduling a call between BST and IST
The examples assume 9 AM to 5 PM on a working day in both places. They do not check weekends, local holidays, or individual schedules.
Standard business hours (9:00 AM to 5:00 PM) overlap on January 15 from 9:00 AM to 11:30 AM in BST, which is 2:30 PM to 5:00 PM in IST.
On July 15 the overlap runs 9:00 AM to 12:30 PM in BST (1:30 PM to 5:00 PM in IST).
More BST conversions
Offsets are computed from the IANA time zone database for January 15 and July 15, 2026. BST here means British Time (United Kingdom); IST means India Standard Time (India).