HST to ACST Converter

ACST is 19h 30m ahead of HST. When it's 12:00 PM HST, it's 7:30 AM (+1 day) ACST.

From

HST · UTC-10

6:09:47PM

Hawaii Standard Time

e.g. Honolulu

To

ACST · UTC+9:30

1:39:47PM

Australian Central Standard Time

e.g. Adelaide, Darwin

Open in World ClockACST → HST
9:00 AM HST=4:30 AM(+1 day) ACST
12:00 PM HST=7:30 AM(+1 day) ACST
5:00 PM HST=12:30 PM(+1 day) ACST

Hourly conversion (HST → ACST)

HSTACST
12:00 AM7:30 PM
1:00 AM8:30 PM
2:00 AM9:30 PM
3:00 AM10:30 PM
4:00 AM11:30 PM
5:00 AM12:30 AM(+1 day)
6:00 AM1:30 AM(+1 day)
7:00 AM2:30 AM(+1 day)
8:00 AM3:30 AM(+1 day)
9:00 AM4:30 AM(+1 day)
10:00 AM5:30 AM(+1 day)
11:00 AM6:30 AM(+1 day)
12:00 PM7:30 AM(+1 day)
1:00 PM8:30 AM(+1 day)
2:00 PM9:30 AM(+1 day)
3:00 PM10:30 AM(+1 day)
4:00 PM11:30 AM(+1 day)
5:00 PM12:30 PM(+1 day)
6:00 PM1:30 PM(+1 day)
7:00 PM2:30 PM(+1 day)
8:00 PM3:30 PM(+1 day)
9:00 PM4:30 PM(+1 day)
10:00 PM5:30 PM(+1 day)
11:00 PM6:30 PM(+1 day)

Shaded rows are within standard working hours (8am–6pm) on both sides.

Hawaii does not observe daylight saving time, so HST (UTC−10) applies year-round.

More HST conversions

Frequently asked questions

What is the time difference between HST and ACST?
ACST is 19h 30m ahead of HST. HST is UTC-10 and ACST is UTC+9:30.
What is 12:00 PM HST in ACST?
12:00 PM HST is 7:30 AM (+1 day) ACST.
Does HST change for daylight saving time?
Hawaii does not observe daylight saving time, so HST (UTC−10) applies year-round.