HST to KST time converter

KST is 19 hours ahead of HST. When it is 9:00 AM in HST, it is 4:00 AM (Sat, Oct 17) in KST.

HST UTC-10

Friday, October 16, 2026

KST UTC+9

Saturday, October 17, 2026

HST
Hawaii-Aleutian Standard Time
Fri, Oct 16
UTC-10
KST
Korea Standard Time
Sat, Oct 17
UTC+9+19h
Finding your time zone…
Shared working hours (9:00–18:00)

HST to KST conversion table

Every hour of today in HST and the matching time in KST. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Both sides are at work from 2:00 PM – 6:00 PM in HST (9:00 AM – 1:00 PM in KST).

Daylight saving time and the difference

The difference stays 19 hours all year.

More conversions

KST to HSTHST to UTCHST to GMTHST to ESTHST to CSTHST to MSTHST to PSTHST to CETHST to MSKHST to GSTHST to PKTHST to ISTHST to SGT
UTC to KSTGMT to KSTEST to KSTCST to KSTMST to KSTPST to KSTCET to KSTMSK to KSTGST to KSTPKT to KSTIST to KSTSGT to KST

Questions and answers

What is the time difference between HST and KST?

KST is 19 hours ahead of HST.

What time is it in KST when it is 9 AM in HST?

When it is 9:00 AM in HST, it is 4:00 AM (Sat, Oct 17) in KST.

When is the best time to call KST from HST?

Both sides are at work from 2:00 PM – 6:00 PM in HST (9:00 AM – 1:00 PM in KST).

Does the time difference between HST and KST change?

No. The difference stays 19 hours all year.