AWST to HST Converter
HST is 18 hours behind AWST. 9:00 AM AWST = 3:00 PM HST (previous day).
HST is 18 hours behind AWST. To convert AWST to HST, subtract 18 hours from the AWST time: 9:00 AM AWST = 3:00 PM HST (previous day).
AWST (Australian Western Time) is used in Western Australia (Perth). HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time).
AWST to HST time conversion table
AWST to HST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| AWST | HST | Day |
|---|---|---|
| 12:00 AM AWST | 6:00 AM HST | previous day |
| 1:00 AM AWST | 7:00 AM HST | previous day |
| 2:00 AM AWST | 8:00 AM HST | previous day |
| 3:00 AM AWST | 9:00 AM HST | previous day |
| 4:00 AM AWST | 10:00 AM HST | previous day |
| 5:00 AM AWST | 11:00 AM HST | previous day |
| 6:00 AM AWST | 12:00 PM HST | previous day |
| 7:00 AM AWST | 1:00 PM HST | previous day |
| 8:00 AM AWST | 2:00 PM HST | previous day |
| 9:00 AM AWST | 3:00 PM HST | work hours |
| 10:00 AM AWST | 4:00 PM HST | work hours |
| 11:00 AM AWST | 5:00 PM HST | previous day |
| 12:00 PM AWST | 6:00 PM HST | previous day |
| 1:00 PM AWST | 7:00 PM HST | previous day |
| 2:00 PM AWST | 8:00 PM HST | previous day |
| 3:00 PM AWST | 9:00 PM HST | previous day |
| 4:00 PM AWST | 10:00 PM HST | previous day |
| 5:00 PM AWST | 11:00 PM HST | previous day |
| 6:00 PM AWST | 12:00 AM HST | night |
| 7:00 PM AWST | 1:00 AM HST | night |
| 8:00 PM AWST | 2:00 AM HST | night |
| 9:00 PM AWST | 3:00 AM HST | night |
| 10:00 PM AWST | 4:00 AM HST | night |
| 11:00 PM AWST | 5:00 AM HST | night |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert AWST to HST
Subtract 18 hours from the AWST time to get HST.
Example: 9:00 AM AWST = 3:00 PM HST (previous day).
Across midnight: 1:00 AM AWST = 7:00 AM HST (previous day). The date changes, so always check the day as well as the hour.
Time difference between AWST and HST
The time difference between AWST and HST is 18 hours all year – HST is behind AWST.
AWST and HST during daylight saving time
- AWST 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 AWST and HST
AWST and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM AWST, which is 1:00 PM HST.
AWST to HST FAQ
What is the time difference between AWST and HST?
HST is 18 hours behind AWST all year. 9:00 AM AWST = 3:00 PM HST (previous day).
What is 9 AM AWST in HST?
9:00 AM AWST is 3:00 PM HST (previous day).
What is 12 PM (noon) AWST in HST?
12:00 PM AWST is 6:00 PM HST (previous day).
Is HST ahead of or behind AWST?
HST is 18 hours behind AWST, so it is earlier in HST than in AWST.
Does AWST change for daylight saving time?
No. AWST 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 AWST and HST?
AWST and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM AWST, which is 1:00 PM HST.
Related conversions
Convert HST to AWST
Convert AWST to other time zones
Convert other time zones to HST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.