iformat.io
Convert Greenwich Mean Time (GMT) to Chatham Island Standard Time (CHAST, UTC+12.75) for regional business calls. Free converter with real-time conversion, meeting time planner, and business hours comparison for GMT to CHAST coordination. Includes 24-hour conversion table and live time displays. Perfect for international scheduling and global team collaboration. Works on all devices with accurate, reliable results.
Chatham Island Standard Time is 12 hours and 45 minutes ahead of Greenwich Mean Time
Complete hourly conversion for Greenwich Mean Time to Chatham Island Standard Time
| Greenwich Mean Time | Chatham Island Standard Time | 24-Hour GMT | 24-Hour CHAST |
|---|---|---|---|
| 12:00 AM | 12:45 PM | 00:00 | 12:45 |
| 1:00 AM | 1:45 PM | 01:00 | 13:45 |
| 2:00 AM | 2:45 PM | 02:00 | 14:45 |
| 3:00 AM | 3:45 PM | 03:00 | 15:45 |
| 4:00 AM | 4:45 PM | 04:00 | 16:45 |
| 5:00 AM | 5:45 PM | 05:00 | 17:45 |
| 6:00 AM | 6:45 PM | 06:00 | 18:45 |
| 7:00 AM | 7:45 PM | 07:00 | 19:45 |
| 8:00 AM | 8:45 PM | 08:00 | 20:45 |
| 9:00 AM | 9:45 PM | 09:00 | 21:45 |
| 10:00 AM | 10:45 PM | 10:00 | 22:45 |
| 11:00 AM | 11:45 PM | 11:00 | 23:45 |
| 12:00 PM | 12:45 AM (next day) | 12:00 | 00:45 |
| 1:00 PM | 1:45 AM (next day) | 13:00 | 01:45 |
| 2:00 PM | 2:45 AM (next day) | 14:00 | 02:45 |
| 3:00 PM | 3:45 AM (next day) | 15:00 | 03:45 |
| 4:00 PM | 4:45 AM (next day) | 16:00 | 04:45 |
| 5:00 PM | 5:45 AM (next day) | 17:00 | 05:45 |
| 6:00 PM | 6:45 AM (next day) | 18:00 | 06:45 |
| 7:00 PM | 7:45 AM (next day) | 19:00 | 07:45 |
| 8:00 PM | 8:45 AM (next day) | 20:00 | 08:45 |
| 9:00 PM | 9:45 AM (next day) | 21:00 | 09:45 |
| 10:00 PM | 10:45 AM (next day) | 22:00 | 10:45 |
| 11:00 PM | 11:45 AM (next day) | 23:00 | 11:45 |
Optimal hours for calls between GMT and CHAST
Based on standard business hours (9:00 AM - 6:00 PM) in each time zone
Technical information for both time zones
Source timezone
Target timezone
