HST to SGT Converter
SGT is 18 hours ahead of HST
HST to SGT Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in SGT
| HST | SGT |
|---|---|
| 12:00 AM | 6:00 PM |
| 1:00 AM | 7:00 PM |
| 2:00 AM | 8:00 PM |
| 3:00 AM | 9:00 PM |
| 4:00 AM | 10:00 PM |
| 5:00 AM | 11:00 PM |
| 6:00 AM | 12:00 AM +1d |
| 7:00 AM | 1:00 AM +1d |
| 8:00 AM | 2:00 AM +1d |
| 9:00 AM | 3:00 AM +1d |
| 10:00 AM | 4:00 AM +1d |
| 11:00 AM | 5:00 AM +1d |
| 12:00 PM | 6:00 AM +1d |
| 1:00 PM | 7:00 AM +1d |
| 2:00 PM | 8:00 AM +1d |
| 3:00 PM | 9:00 AM +1d |
| 4:00 PM | 10:00 AM +1d |
| 5:00 PM | 11:00 AM +1d |
| 6:00 PM | 12:00 PM +1d |
| 7:00 PM | 1:00 PM +1d |
| 8:00 PM | 2:00 PM +1d |
| 9:00 PM | 3:00 PM +1d |
| 10:00 PM | 4:00 PM +1d |
| 11:00 PM | 5:00 PM +1d |
Converting Hawaii Standard Time to Singapore Time
Hawaii Standard Time (HST) and Singapore Time (SGT) are separated by a 18 hours time difference. SGT is 18 hours ahead of HST. HST is UTC-10, used in United States, while SGT is UTC+8, used in Singapore.
When converting from HST to SGT, the key reference points to remember are: 9:00 AM HST equals 3:00 AM SGT, 12:00 PM noon HST equals 6:00 AM SGT, and 5:00 PM HST equals 11:00 AM SGT. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across HST and SGT
For professionals scheduling meetings between HST and SGT, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 18 hours difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
HST does not observe Daylight Saving Time, maintaining UTC-10 year-round. SGT does not observe DST, staying at UTC+8 year-round.