BST to IST Converter

IST is 4h 30m ahead of BST. When it's 12:00 PM BST, it's 4:30 PM IST.

From

BST · UTC+1

5:09:49AM

British Summer Time

e.g. London, Dublin

To

IST · UTC+5:30

9:39:49AM

India Standard Time

e.g. Kolkata

Open in World ClockIST → BST
9:00 AM BST=1:30 PM IST
12:00 PM BST=4:30 PM IST
5:00 PM BST=9:30 PM IST

Hourly conversion (BST → IST)

BSTIST
12:00 AM4:30 AM
1:00 AM5:30 AM
2:00 AM6:30 AM
3:00 AM7:30 AM
4:00 AM8:30 AM
5:00 AM9:30 AM
6:00 AM10:30 AM
7:00 AM11:30 AM
8:00 AM12:30 PM
9:00 AM1:30 PM
10:00 AM2:30 PM
11:00 AM3:30 PM
12:00 PM4:30 PM
1:00 PM5:30 PM
2:00 PM6:30 PM
3:00 PM7:30 PM
4:00 PM8:30 PM
5:00 PM9:30 PM
6:00 PM10:30 PM
7:00 PM11:30 PM
8:00 PM12:30 AM(+1 day)
9:00 PM1:30 AM(+1 day)
10:00 PM2:30 AM(+1 day)
11:00 PM3:30 AM(+1 day)

Shaded rows are within standard working hours (8am–6pm) on both sides.

BST here is British Summer Time (UTC+1); in winter the UK uses GMT (UTC+0). BST can also mean Bangladesh Standard Time (UTC+6).

IST here is India Standard Time (UTC+5:30). It can also mean Irish Standard Time or Israel Standard Time.

More BST conversions

Frequently asked questions

What is the time difference between BST and IST?
IST is 4h 30m ahead of BST. BST is UTC+1 and IST is UTC+5:30.
What is 12:00 PM BST in IST?
12:00 PM BST is 4:30 PM IST.
Does BST change for daylight saving time?
BST here is British Summer Time (UTC+1); in winter the UK uses GMT (UTC+0). BST can also mean Bangladesh Standard Time (UTC+6).