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HST to GMT converter
Hawaii Time
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Greenwich Mean Time
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Greenwich Mean Time is always 10 hours ahead of Hawaii Time.
When does the difference change?
The difference stays the same all year: GMT is 10 hours ahead of HST.
Questions
What time is 9 AM HST in GMT?
9 AM Hawaii Time is 7 PM Greenwich Mean Time.
How many hours ahead or behind is GMT from HST?
Greenwich Mean Time is always 10 hours ahead of Hawaii Time.
Does the HST to GMT difference change?
No, it stays the same all year.
About these time zones
HST to GMT, hour by hour
| Hawaii Time | Greenwich Mean Time |
|---|---|
| 12 AM | 10 AM |
| 1 AM | 11 AM |
| 2 AM | 12 PM |
| 3 AM | 1 PM |
| 4 AM | 2 PM |
| 5 AM | 3 PM |
| 6 AM | 4 PM |
| 7 AM | 5 PM |
| 8 AM | 6 PM |
| 9 AM | 7 PM |
| 10 AM | 8 PM |
| 11 AM | 9 PM |
| 12 PM | 10 PM |
| 1 PM | 11 PM |
| 2 PM | 12 AM (next day) |
| 3 PM | 1 AM (next day) |
| 4 PM | 2 AM (next day) |
| 5 PM | 3 AM (next day) |
| 6 PM | 4 AM (next day) |
| 7 PM | 5 AM (next day) |
| 8 PM | 6 AM (next day) |
| 9 PM | 7 AM (next day) |
| 10 PM | 8 AM (next day) |
| 11 PM | 9 AM (next day) |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.