HST to MST Converter

MST is 3 hours ahead of HST right now.

Hawaii Time—HST
Mountain Time—MST

HST to MST conversion table

Based on today's offsets (HST UTC−10, MST UTC−7). Business hours are highlighted.

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 (next day)
10:00 PM1:00 AM (next day)
11:00 PM2:00 AM (next day)

Questions

What is the time difference between HST and MST?

Right now MST is 3 hours ahead of HST. The gap can change by an hour when daylight saving time starts or ends, because not every zone switches on the same date (or at all).

How do I convert HST to MST?

Add 3 hours to the HST time. For example, 12:00 PM HST is 3:00 PM MST.

Is it MST or MDT right now?

People often say “MST” all year, but during daylight saving time (mid-March to early November in the US) the zone is on MDT. It's MST right now. The converter above uses the correct one automatically.