10:00AM IST is 04:30 AM GMT
Reference Date: January 21, 2026
🕐 Live Current Time
IST (Indian Standard Time)
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GMT (Greenwich Mean Time)
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⏱ Times update every second. Automatically handles DST changes.
📍 Timezone Information
IST (Indian Standard Time)
UTC Offset: +05:30
Used throughout India and Sri Lanka.
GMT (Greenwich Mean Time)
UTC Offset: +00:00
The mean solar time at the Royal Observatory in Greenwich, London.
⏰ Time Difference: 5.5 hours
📊 Quick Reference Conversion Table
Complete IST to GMT time conversion chart (every 2 hours):
| IST Time | GMT Time | Period | Notes |
|---|---|---|---|
| 12:00 AM | 06:30 PM (Jan 20) | night → evening | 📅 Date changes |
| 02:00 AM | 08:30 PM (Jan 20) | night → evening | 📅 Date changes |
| 04:00 AM | 10:30 PM (Jan 20) | night → night | 📅 Date changes |
| 06:00 AM | 12:30 AM | morning → night | Same date |
| 08:00 AM | 02:30 AM | morning → night | Same date |
| 10:00 AM | 04:30 AM | morning → night | Same date |
| 12:00 PM | 06:30 AM | afternoon → morning | Same date |
| 02:00 PM | 08:30 AM | afternoon → morning | Same date |
| 04:00 PM | 10:30 AM | afternoon → morning | Same date |
| 06:00 PM | 12:30 PM | evening → afternoon | Same date |
| 08:00 PM | 02:30 PM | evening → afternoon | Same date |
| 10:00 PM | 04:30 PM | night → afternoon | Same date |
💡 Practical Tips for IST to GMT Conversions
✗ Not ideal for meetings: 10:00AM IST falls outside business hours in GMT (4:00 - late night/early morning).
✈ Travel tip: Expect 2-3 days of jet lag adjustment when flying between IST and GMT. Arrive well-rested and stay hydrated during your flight.
📞 Popular time for India-UK business calls. Many UK companies schedule India liaisons during this window.
🌍 Interesting Facts About These Timezones
Ireland also uses GMT, referred to as Irish Standard Time during winter months.
IST is 5 hours and 30 minutes ahead of GMT, one of the few half-hour offset timezones.
GMT is based on the Prime Meridian at 0° longitude, passing through Greenwich, London.
The UK switches to BST (British Summer Time, UTC+1) during Daylight Saving Time.
Over 1.4 billion people live in the IST timezone, making it one of the most populous.
🔄 Custom Time Converter
Convert any time between timezones instantly:
Your local time (Hyderabad, IST): --:-- --