HST to MST Converter

MST is 3h 0m ahead of HST. When it's 12:00 PM HST, it's 3:00 PM MST.

From

HST · UTC-10

6:09:47PM

Hawaii Standard Time

e.g. Honolulu

To

MST · UTC-7

9:09:47PM

Mountain Standard Time

e.g. Denver, Phoenix

Open in World ClockMST → HST
9:00 AM HST=12:00 PM MST
12:00 PM HST=3:00 PM MST
5:00 PM HST=8:00 PM MST

Hourly conversion (HST → MST)

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

MST (UTC−7) is the standard-time offset; most of the US Mountain region uses MDT (UTC−6) in summer.

More HST conversions

Frequently asked questions

What is the time difference between HST and MST?
MST is 3h 0m ahead of HST. HST is UTC-10 and MST is UTC-7.
What is 12:00 PM HST in MST?
12:00 PM HST is 3:00 PM MST.
Does HST change for daylight saving time?
Hawaii does not observe daylight saving time, so HST (UTC−10) applies year-round.