SGT to HST Converter
HST is 18 hours behind SGT. 9:00 AM SGT = 3:00 PM HST (previous day).
HST is 18 hours behind SGT. To convert SGT to HST, subtract 18 hours from the SGT time: 9:00 AM SGT = 3:00 PM HST (previous day).
SGT (Singapore Time) is used in Singapore. HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time).
SGT to HST time conversion table
SGT to HST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| SGT | HST |
|---|---|
| 12:00 AM | 6:00 AM−1 |
| 1:00 AM | 7:00 AM−1 |
| 2:00 AM | 8:00 AM−1 |
| 3:00 AM | 9:00 AM−1 |
| 4:00 AM | 10:00 AM−1 |
| 5:00 AM | 11:00 AM−1 |
| 6:00 AM | 12:00 PM−1 |
| 7:00 AM | 1:00 PM−1 |
| SGT | HST |
|---|---|
| 8:00 AM | 2:00 PM−1 |
| 9:00 AM | 3:00 PM−1 |
| 10:00 AM | 4:00 PM−1 |
| 11:00 AM | 5:00 PM−1 |
| 12:00 PM | 6:00 PM−1 |
| 1:00 PM | 7:00 PM−1 |
| 2:00 PM | 8:00 PM−1 |
| 3:00 PM | 9:00 PM−1 |
| SGT | HST |
|---|---|
| 4:00 PM | 10:00 PM−1 |
| 5:00 PM | 11:00 PM−1 |
| 6:00 PM | 12:00 AM |
| 7:00 PM | 1:00 AM |
| 8:00 PM | 2:00 AM |
| 9:00 PM | 3:00 AM |
| 10:00 PM | 4:00 AM |
| 11:00 PM | 5:00 AM |
Conversion table from SGT to HST for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in HST, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert SGT to HST
Subtract 18 hours from the SGT time to get HST.
Example: 9:00 AM SGT = 3:00 PM HST (previous day).
Across midnight: 1:00 AM SGT = 7:00 AM HST (previous day). The date changes, so always check the day as well as the hour.
Time difference between SGT and HST
The time difference between SGT and HST is 18 hours all year – HST is behind SGT.
SGT and HST during daylight saving time
- SGT does not observe daylight saving time; it stays on UTC+8 all year.
- HST does not observe daylight saving time; it stays on UTC−10 all year.
Best time for a meeting between SGT and HST
SGT and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM SGT, which is 1:00 PM HST.
SGT to HST FAQ
What is the time difference between SGT and HST?
HST is 18 hours behind SGT all year. 9:00 AM SGT = 3:00 PM HST (previous day).
What is 9 AM SGT in HST?
9:00 AM SGT is 3:00 PM HST (previous day).
What is 12 PM (noon) SGT in HST?
12:00 PM SGT is 6:00 PM HST (previous day).
Is HST ahead of or behind SGT?
HST is 18 hours behind SGT, so it is earlier in HST than in SGT.
Does SGT change for daylight saving time?
No. SGT stays on the same offset all year, so conversions never shift for daylight saving time.
Does HST change for daylight saving time?
No. HST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between SGT and HST?
SGT and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM SGT, which is 1:00 PM HST.
Related conversions
Convert HST to SGT
Convert SGT to other time zones
Convert other time zones to HST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.