iformat.io
Convert Hawaii Standard Time (HST) to Greenwich Mean Time (GMT, UTC+0) for regional business calls. Free converter with real-time conversion, meeting time planner, and business hours comparison for HST to GMT 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.
Greenwich Mean Time is 10 hours ahead of Hawaii Standard Time
Complete hourly conversion for Hawaii Standard Time to Greenwich Mean Time
| Hawaii Standard Time | Greenwich Mean Time | 24-Hour HST | 24-Hour GMT |
|---|---|---|---|
| 12:00 AM | 10:00 AM | 00:00 | 10:00 |
| 1:00 AM | 11:00 AM | 01:00 | 11:00 |
| 2:00 AM | 12:00 PM | 02:00 | 12:00 |
| 3:00 AM | 1:00 PM | 03:00 | 13:00 |
| 4:00 AM | 2:00 PM | 04:00 | 14:00 |
| 5:00 AM | 3:00 PM | 05:00 | 15:00 |
| 6:00 AM | 4:00 PM | 06:00 | 16:00 |
| 7:00 AM | 5:00 PM | 07:00 | 17:00 |
| 8:00 AM | 6:00 PM | 08:00 | 18:00 |
| 9:00 AM | 7:00 PM | 09:00 | 19:00 |
| 10:00 AM | 8:00 PM | 10:00 | 20:00 |
| 11:00 AM | 9:00 PM | 11:00 | 21:00 |
| 12:00 PM | 10:00 PM | 12:00 | 22:00 |
| 1:00 PM | 11:00 PM | 13:00 | 23:00 |
| 2:00 PM | 12:00 AM (next day) | 14:00 | 00:00 |
| 3:00 PM | 1:00 AM (next day) | 15:00 | 01:00 |
| 4:00 PM | 2:00 AM (next day) | 16:00 | 02:00 |
| 5:00 PM | 3:00 AM (next day) | 17:00 | 03:00 |
| 6:00 PM | 4:00 AM (next day) | 18:00 | 04:00 |
| 7:00 PM | 5:00 AM (next day) | 19:00 | 05:00 |
| 8:00 PM | 6:00 AM (next day) | 20:00 | 06:00 |
| 9:00 PM | 7:00 AM (next day) | 21:00 | 07:00 |
| 10:00 PM | 8:00 AM (next day) | 22:00 | 08:00 |
| 11:00 PM | 9:00 AM (next day) | 23:00 | 09:00 |
Optimal hours for calls between HST and GMT
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
