Convert India time to GMT / London — daylight saving is handled automatically.
IST to GMT time difference
IST is always UTC/GMT +5:30. London is on GMT in winter and BST (GMT+1) from late March to late October, so India is 5.5 hours ahead in winter and 4.5 hours ahead in summer.
Best time for calls
Use the full-day table above: pick an IST hour that lands in the other side's 9 am – 6 pm. Daylight-saving dates shift every year, so the converter uses the actual rules for the date you choose.
Other zones: EST · PST · GMT.
Frequently asked questions
What time is 9 am IST in GMT?
Enter 09:00 above — the answer depends on daylight saving on that date.
Does India have daylight saving time?
No. IST is UTC+5:30 all year; only the other side changes.
Is the converter accurate for DST?
Yes, it uses your browser's built-in time-zone database for the exact date.