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BST to IST Time Converter

This page converts British Time (BST) to India Standard Time (IST). India is 5 hours 30 minutes ahead of London when London is on GMT (around January), and 4 hours 30 minutes ahead of when it is on BST (around July). The difference changes because the two zones change their clocks at different times.

Pick a date and time above for an exact conversion that accounts for daylight saving, or use the table below for a quick look-up.

Current time around the world

ZoneLocal time nowUTC offset

The time difference

ConversionAdd to BST
GMT to IST+5:30
BST to IST+4:30

IST time = BST time + 5:30 hours

If the result passes midnight, the date moves forward (or back) by a day. The converter above shows the day change explicitly.

BST to IST conversion table

GMT to IST (valid in January and whenever British Time is on GMT)

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

BST to IST (valid in July and whenever British Time is on BST)

British Time (BST)India Standard Time (IST)
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 (next day)
9:00 PM1:30 AM (next day)
10:00 PM2:30 AM (next day)
11:00 PM3:30 AM (next day)

Best times for a meeting between London and India

These hours fall between 9 AM and 6 PM in both cities:

When London is on GMT:

When London is on BST:

Frequently asked questions

What is the time difference between BST and IST?

India is 5 hours 30 minutes ahead of London when London is on GMT (around January), and 4 hours 30 minutes ahead of when it is on BST (around July). The difference changes because the two zones change their clocks at different times.

Does IST observe daylight saving time?

No. India Standard Time stays on the same offset all year. British Time does change its clocks, which is why the difference varies by season.

What time is 9 AM BST in IST?

9:00 AM GMT is 2:30 PM IST, and 9:00 AM BST is 1:30 PM IST.

How do I convert a different date or time?

Enter the date and time at the top of this page. The converter uses your browser's time zone database, so it applies the correct offset for that specific date, including the weeks around clock changes.

Related calculators

Last updated . Formulas are shown on the page and checked against the worked example.

This calculator is for general information and education only. It is not professional advice. Confirm important decisions with a qualified adviser.