GMT to IST Converter
Convert Greenwich Mean Time (GMT) to Indian Standard Time (IST) instantly. Live clocks, bidirectional conversion, 12/24-hour format. IST is always GMT + 5 hours 30 minutes.
Current time
Current time
IST = GMT + 5 hours 30 minutes
GMT to IST Quick Reference
| GMT | IST |
|---|---|
| 00:00 | 05:30 |
| 02:00 | 07:30 |
| 04:00 | 09:30 |
| 06:00 | 11:30 |
| 08:00 | 13:30 |
| 10:00 | 15:30 |
| 12:00 | 17:30 |
| 14:00 | 19:30 |
| 16:00 | 21:30 |
| 18:00 | 23:30 |
| 20:00 | 01:30 (+1 day) |
| 22:00 | 03:30 (+1 day) |
GMT vs IST — Key Facts
GMT (Greenwich Mean Time)
UTC+0. The prime meridian time at the Royal Observatory in Greenwich, London. Used as the global reference for time zones. Also known as UTC (Coordinated Universal Time) for practical purposes.
IST (Indian Standard Time)
UTC+5:30. The time zone for all of India, calculated from 82.5°E longitude passing through Mirzapur, Uttar Pradesh. 5 hours 30 minutes ahead of GMT, all year round (no DST).
The 5:30 Offset
India's +5:30 offset is one of the few half-hour offsets in the world. It was chosen as a compromise between the far east and west of India to keep one national time zone.
No Daylight Saving
India does not use daylight saving time. The GMT-IST difference is always exactly 5:30, making conversions simple year-round without seasonal adjustments.
Common GMT to IST Conversions
12:00 AM (midnight)
5:30 AM
6:00 AM
11:30 AM
9:00 AM (UK office)
2:30 PM
12:00 PM (noon)
5:30 PM
3:00 PM
8:30 PM
6:00 PM
11:30 PM
9:00 PM
2:30 AM (+1)
11:59 PM
5:29 AM (+1)
Frequently Asked Questions
What is the difference between GMT and IST?▼
IST is 5 hours and 30 minutes ahead of GMT. IST = GMT + 5:30. This offset is constant throughout the year since India does not observe daylight saving time.
When is 9 AM GMT in IST?▼
9:00 AM GMT = 2:30 PM IST. Simply add 5 hours 30 minutes.
Is GMT the same as UTC?▼
For everyday use, yes. Technically, UTC is an atomic time standard while GMT is a time zone, but they always show the same time.
When UK switches to BST, does this affect the conversion?▼
UK switches to BST (British Summer Time, GMT+1) in summer. But GMT itself stays at UTC+0. IST is always GMT+5:30, not UK time + something. So during BST, UK is only 4:30 ahead of IST offset from UK local time.
What cities are in IST?▼
All cities in India use IST: Mumbai, Delhi, Bangalore, Chennai, Kolkata, Hyderabad, Pune, Ahmedabad, and all others. Sri Lanka also uses +5:30 (SLST).
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