BST ISTTime Converter
BST (UTC+1) is currently 4 hours 30 minutes behind IST (UTC+5:30). Compare live clocks, convert any hour, and find times to meet.
Best time to meet between BST and IST
Best meeting times:
BST: 9:00 AM – 2:00 PM
IST: 1:30 PM – 6:30 PM
Quick answer
When it's in BST, it's the same day in IST.
BST runs 4 hours 30 minutes behind IST. Both sides keep standard office hours with a real 9–6 overlap: the highlighted window above works for everyone.
- Time difference
- +4h 30m
- BST
- UTC+1
- IST
- UTC+5:30
- Best call window
- 9:00 AM BST
BST to IST conversion table
The next 12 hours in BST and the matching local time in IST. The current hour is highlighted; drag the converter's slider and the table follows.
| BST | IST |
|---|---|
| NOW Thu, Aug 6 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Daylight saving shifts this gap by up to 1 hour
The difference between BST and IST swings between 4.5 and 5.5 hours across the year as each side starts or ends daylight saving. BST is the daylight-saving counterpart of GMT (UTC±0). This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair: every combination is a live tool, not an article.
From BST
To IST
One source of truth, for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am BST time in IST?", it can cite the exact, DST-aware result, not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with time zone identifiers and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "BST → IST",
"url": "https://worldclock.pro/en/convert/bst-to-ist",
"from": {
"name": "BST",
"type": "timezone",
"abbreviation": "GMT",
"daylightAbbreviation": "BST",
"iana": "Europe/London",
"standardUtcOffset": "+00:00",
"daylightUtcOffset": "+01:00",
"referenceCity": "London"
},
"to": {
"name": "IST",
"type": "timezone",
"abbreviation": "IST",
"daylightAbbreviation": null,
"iana": "Asia/Kolkata",
"standardUtcOffset": "+05:30",
"daylightUtcOffset": null,
"referenceCity": "Mumbai"
},
"currentDifferenceMinutes": 270,
"possibleDifferencesMinutes": [
270,
330
],
"note": "Between the regions that use these zones the difference is 4.5 and 5.5 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between BST and IST?
BST is currently 4 hours 30 minutes behind IST. BST is on BST (UTC+1) and IST is on IST (UTC+5:30). The difference can change when either side starts or ends daylight saving time.
Is IST ahead of or behind BST?
IST is currently 4 hours 30 minutes ahead of BST.
When it is 9:00 AM in BST, what time is it in IST?
When it is 9:00 AM on a Thursday in BST, it is 1:30 PM in IST.
Do BST and IST observe daylight saving time?
BST is the daylight-saving counterpart of GMT (UTC±0). IST does not observe daylight saving time.
How do I convert BST time to IST time?
Add 4 hours 30 minutes to any time in BST to get the time in IST. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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