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