Formula: IST = GMT + 5:30 • GMT = UTC for all practical purposes. India never observes DST.
⏰ GMT to IST – Full 24-Hour Reference Table
GMT Time
IST Time 🇮🇳
12-Hour
+1 Day?
GMT = UTC+0. IST = UTC+5:30. Difference = +5 hours 30 minutes. No DST in India.
⚡ Popular GMT to IST Conversions
GMT 00:00 = IST 05:30
GMT 06:00 = IST 11:30
GMT 09:00 = IST 14:30
GMT 12:00 = IST 17:30
GMT 15:00 = IST 20:30
GMT 18:00 = IST 23:30
GMT 20:00 = IST 01:30 +1d
❓ Frequently Asked Questions
How do I convert GMT to IST?
Add 5 hours and 30 minutes to any GMT time. GMT 9:00 AM + 5:30 = IST 2:30 PM. GMT 6:00 PM + 5:30 = IST 11:30 PM.
Is GMT the same as UTC?
For day-to-day scheduling, yes. GMT and UTC are both at the prime meridian (0° longitude). They differ by at most 0.9 seconds due to leap seconds, which is irrelevant for time zone conversions.
What is GMT 9 AM in IST?
GMT 9:00 AM = IST 2:30 PM (14:30). This is within normal business hours in India.
Does the UK's BST affect GMT to IST conversions?
The UK itself switches to BST (British Summer Time, UTC+1) from late March to late October — but GMT never changes. If you're working with UK time in summer, use BST (UTC+1), which makes BST to IST = +4:30.
What is the best time for UK–India meetings?
During GMT (winter): GMT 9 AM = IST 2:30 PM (good overlap). During BST (summer): BST 9 AM = IST 1:30 PM. Both are workable during standard business hours.